Operating voltage: 2.7V~5.2V Built-in 32kHz oscillator External 32.768

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Operating voltage: 2.7V~5.2V Built-in 32kHz oscillator External 32.768

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HT1670 Controller
Operating voltage: 2.7V~5.2V Built-in 32kHz oscillator External 32.768kHz crystal oscillator 32kHz Six-wire interface (four data wires) Eight kinds time base/WDT selection Time base overflow output address auto increment Built-in buzzer driver (2kHz/4kHz) Power down command reduces power consumption Software configuration feature Data mode Command mode instructions Three data accessing modes Provides VLCD adjust operating voltage
quency source input
Standby current: <1mA <2mA Internal resistor type: bias bias, 1/32 duty,
1/16 duty
Three selectable frame frequencies: 64Hz,
89Hz 170Hz
Max. patterns, segments com-
mons
segments commons selectable com-
max. VLCD voltage
Provides three kinds bias current programming Control TN-type STN-type LCDs 208-pin package
mand method
Built-in bit-map display RAM: 4096 bits bits) Built-in internal resistor type bias generator
Applications
Leisure products Games Personal digital assistant Cellular phone Global positioning system Consumer electronics
General Description
HT1670 peripheral device specially designed type used expand display capability. max. display segment device 4096 patterns (128 segments commons). also supports four data bits interface, buzzer sound, Watchdog Timer time base timer functions. HT1670 memory mapping multi-function controller. Since HT1670 control TN-type (Twisted Nematic) STN-type (Super Twisted Nematic) LCDs. software configuration feature HT1670 make suitable multiple applications including modules display subsystems. Only lines (CS, DB0~DB3) required interface between host controller HT1670.
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HT1670
Block Diagram
Assignment
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HT1670
Assignment
Coordinates
-2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 2715.30 2581.20 2461.20 2341.20 2221.20 2101.20 1990.25 1890.25 1790.25 -848.60 -713.20 -567.90 -432.30 -290.20 -156.70 -18.50 119.80 209.15 -2594.80 -2594.80 -2594.80 -2594.80 -2594.90 -2599.30 -2599.30 -2666.95 -2531.95 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05
substrate should connected layout artwork. Unit: 1090.25 1190.25 1290.25 1390.25 1490.25 1590.25 1690.25 1790.25 1890.25
Chip size: (mm)2
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HT1670
-2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -2343.20 -1850.15 -1750.15 -1650.15 -1550.15 -1450.15 -1273.50 -1130.90 -995.50 1690.25 1590.25 1490.25 1390.25 1290.25 1190.25 1090.25 990.25 890.25 790.25 690.25 590.25 490.25 390.25 290.25 190.25 90.25 -9.75 -109.75 -209.75 -309.75 -409.75 -509.75 -609.75 -709.75 -809.75 -909.75 -1009.75 -1109.75 -1209.75 -1309.75 -1409.75 -1509.75 -1609.75 -1709.75 -1809.75 -1909.75 -2009.75 -2109.75 -2209.75 -2309.75 -2409.75 -2509.75 -2609.75 -2702.70 -2702.70 -2702.70 -2702.70 -2702.70 -2594.80 -2594.80 -2594.80 378.85 525.35 660.75 820.45 968.65 1115.65 1263.85 1410.85 1581.55 1707.05 1807.05 1907.05 2013.05 2123.05 2233.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 -2553.20 -2594.90 -2594.90 -2594.90 -2594.90 -2594.90 -2594.90 -2594.90 -2531.90 -2702.70 -2702.70 -2702.70 -2702.70 -2702.70 -2702.70 -2702.70 -2571.70 -2451.70 -2331.70 -2215.05 -2115.05 -2015.05 -1915.05 -1815.05 -1715.05 -1609.75 -1509.75 -1409.75 -1309.75 -1209.75 -1109.75 -1009.75 -909.75 -809.75 -709.75 -609.75 -509.75 -409.75 -309.75 -209.75 -109.75 -9.75 90.25 190.25 290.25 390.25 490.25 590.25 690.25 790.25 890.25 990.25 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2343.05 2095.70 1959.25 1859.25 1759.25 1659.25 1559.25 1459.25 1359.25 1259.25 1159.25 1059.25 959.25 859.25 759.25 659.25 559.25 459.25 359.25 259.25 159.25 59.25 -40.75 -140.75 -240.75 -340.75 -440.75 -540.75 -640.75 -740.75 -840.75 -940.75 -1040.75 -1140.75 -1240.75 -1340.75 -1440.75 -1540.75 -1640.75 -1740.75 -1840.75 -1940.75 -2040.75 -2173.20 1990.25 2101.20 2221.20 2341.20 2461.20 2581.20 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30 2715.30
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HT1670
Description
1~42 96~181 43~58 80~95 Name SEG86~SEG127 SEG0~SEG85 COM31~COM16 COM0~COM15 segment outputs common outputs, under command mode, COM16~COM31 will share SEG128~SEG143. COM31/SEG128, COM30/SEG129, COM29/ SEG130., COM18/SEG141, COM17/SEG142, COM16/SEG143 Chip selection input with pull-high resistor. When logic high, data command read from write HT1670 disabled. serial interface circuit also reset. logic level input pad, data command transmission between host controller HT1670 enabled. READ clock input with pull-high resistor. Data HT1670 clocked falling edge signal. clocked data will appear data line. host controller next rising edge latch clocked data. WRITE clock input with pull-high resistor. Data DATA line latched into HT1670 rising edge signal. Parallel data input/output with pull-high resistor Negative power supply logic circuit, ground OSCI OSCO pads connected 32.768kHz crystal order generate system clock. system clock comes from external clock source, external clock source should connected OSCI pad. on-chip oscillator selected, OSCI OSCO pads left open. Positive power supply logic circuit Power supply driver circuit Time base Watchdog Timer overflow flag, NMOS open drain output. 2kHz 4kHz frequency output pair (tristate output buffer) connected Description
62~65
DB0~DB3
OSCI OSCO
74~78
VLCD T1~T4, T000
Absolute Maximum Ratings
Supply Voltage .VSS-0.3V VSS+5.5V Input Voltage.VSS-0.3V VDD+0.3V Storage Temperature .-50°C 125°C Operating Temperature.-25°C 75°C
Note: These stress ratings only. Stresses exceeding range specified under Maximum cause substantial damage device. Functional operation this device other conditions beyond those listed specification implied prolonged exposure extreme conditions affect device reliability.
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September 2003
HT1670
D.C. Characteristics
Symbol IDD1 IDD2 IDD11 IDD22 ISTB IOL1 IOH1 IOL2 IOH2 IOL3 IOH3 IOL4 IOH4 Parameter Operating Voltage Operating Current Test Conditions Conditions load/LCD On-chip oscillator load/LCD Crystal oscillator load/LCD On-chip oscillator load/LCD Crystal oscillator load, Power down mode Min. -1.8 -1.8 -180 -140 Typ. -0.9 -0.9 Max. Ta=25°C Unit
Operating Current
Operating Current
Operating Current
Standby Current
Input Voltage
DB0~DB3,
Input High Voltage
DB0~DB3, VOL=0.3V VOL=0.5V VOH=2.7V VOH=4.5V VOL=0.3V VOL=0.5V VOH=2.7V VOH=4.5V VOL=0.3V VOL=0.5V VOH=2.7V VOH=4.5V VOL=0.3V VOL=0.5V VOH=2.7V VOH=4.5V DB0~DB3,
Sink Current
Source Current
DB0~DB3 Sink Current
DB0~DB3 Source Current
Common Sink Current
Common Source Current
Segment Sink Current
Segment Source Current
Pull-high Resistor
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September 2003
HT1670
A.C. Characteristics
Symbol Parameter Test Conditions System Clock fSYS2 System Clock fSYS3 System Clock fLCD1 Frame Frequency fLCD2 Frame Frequency fLCD3 tCOM fCLK1 Frame Frequency Common Period 4-Bit Data Clock Pin) fCLK2 4-Bit Data Clock Pin) 4-Bit Interface Reset Pulse Width (Figure tCLK Read mode Input Pulse Width (Figure Write mode Read mode Rise/Fall Time Serial Data Clock Width (Figure Setup Time Clock Width (Figure Hold Time Clock Width (Figure Setup Time Clock Width (Figure Hold Time Clock Width (Figure 3.34 1.67 6.67 Write mode Duty cycle Duty cycle Number External clock source Crystal oscillator On-chip oscillator 61/117 3.34 89/170 111/213 n/fLCD External clock source Crystal oscillator On-chip oscillator 61/117 32.768 32.768 Conditions Min. Typ. Max. Ta=25°C Unit
fSYS1
89/170 111/213
tsu1
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HT1670
Figure
Figure
Figure
Functional Description
System Oscillator HT1670 system clock used generate time base/Watchdog Timer (WDT) clock frequency, driving clock, tone frequency. clock source from on-chip oscillator (32kHz), crystal oscillator (32.768kHz), external 32kHz clock setting. configuration system oscillator shown. After command executed, system clock will stop bias generator will turn off. That command available only on-chip oscillator crystal oscillator. Once system clock stops, display will become blank, time base/WDT loses function well.
illa illa
command used turn bias generator off. After bias generator switches issuing command, using command reduces power consumption, thus serving system power down command. external clock source chosen system clock, using command neither turn oscillator carry power down mode. crystal oscillator option applied connect external frequency source 32kHz OSCI pin. this case, system fails enter power down mode, similar case external 32kHz clock source operation. initial system power HT1670 state.
System Oscillator Configuration
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HT1670
Display Memory Structure static display organized into bits stores display data. contents directly mapped contents driver. Data accessed READ, WRITE READ-MODIFY-WRITE commands. following mapping from patterns. COM0 COM1 COM2 COM3 COM4 COM5 COM6 COM7 COM8 COM9 COM10 COM11 COM12 COM13 COM14 COM15 COM16 COM17 COM18 COM19 COM20 COM21 COM22 COM23 COM24 COM25 COM26 COM27 COM28 COM29 COM30 COM31 Bit0 Bit1 Bit2 Bit3 Bit0 Bit1 Bit2 Bit3 Bit0 Bit1 Bit2 Bit3 Bit0 Bit1 Bit2 Bit3 Bit0 Bit1 Bit2 Bit3 Bit0 Bit1 Bit2 Bit3 Bit0 Bit1 Bit2 Bit3 Bit0 Bit1 Bit2 Bit3 SEG0 Bit0 Bit1 Bit2 Bit3 Bit0 Bit1 Bit2 Bit3 Bit0 Bit1 Bit2 Bit3 Bit0 Bit1 Bit2 Bit3 Bit0 Bit1 Bit2 Bit3 Bit0 Bit1 Bit2 Bit3 Bit0 Bit1 Bit2 Bit3 Bit0 Bit1 Bit2 Bit3 SEG1 Bit0 Bit1 Bit2 Bit3 Bit0 Bit1 Bit2 Bit3 Bit0 Bit1 Bit2 Bit3 Bit0 Bit1 Bit2 Bit3 Bit0 Bit1 Bit2 Bit3 Bit0 Bit1 Bit2 Bit3 Bit0 Bit1 Bit2 Bit3 Bit0 Bit1 Bit2 Bit3 SEG2 SEG3 3DFH 3E7H 26H- 3DEH 3E6H 25H- 3DDH 3E5H 24H- 3DCH 3E4H 23H- 3DBH 3E3H 22H- 3DAH 3E2H 3D9H 3E1H 3D8H 3E0H 3E8H Bit0 Bit1 Bit2 Bit3 3E9H Bit0 Bit1 Bit2 Bit3 3EAH Bit0 Bit1 Bit2 Bit3 3EBH Bit0 Bit1 Bit2 Bit3 3ECH Bit0 Bit1 Bit2 Bit3 3EDH Bit0 Bit1 Bit2 Bit3 3EEH Bit0 Bit1 Bit2 Bit3 3EFH Bit0 Bit1 Bit2 Bit3 3F0H Bit0 Bit1 Bit2 Bit3 3F1H Bit0 Bit1 Bit2 Bit3 3F2H Bit0 Bit1 Bit2 Bit3 3F3H Bit0 Bit1 Bit2 Bit3 3F4H Bit0 Bit1 Bit2 Bit3 3F5H Bit0 Bit1 Bit2 Bit3 3F6H Bit0 Bit1 Bit2 Bit3 3F7H Bit0 Bit1 Bit2 Bit3 3F8H Bit0 Bit1 Bit2 Bit3 3F9H Bit0 Bit1 Bit2 Bit3 3FAH Bit0 Bit1 Bit2 Bit3 3FBH Bit0 Bit1 Bit2 Bit3 3FCH Bit0 Bit1 Bit2 Bit3 3FDH Bit0 Bit1 Bit2 Bit3 3FEH Bit0 Bit1 Bit2 Bit3 3FFH Bit0 Bit1 Bit2 Bit3
SEG124 SEG125 SEG126 SEG127
Selection Mode Mapping Table
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HT1670
COM0 COM1 COM2 COM3 Bit0 Bit1 Bit2 Bit3 COM4 COM5 COM6 COM7 Bit0 Bit1 Bit2 Bit3 COM8 COM9 COM10 COM11 Bit0 Bit1 Bit2 Bit3 COM12 COM13 COM14 COM15 Bit0 Bit1 Bit2 Bit3 SEG0 Bit0 Bit1 Bit2 Bit3 Bit0 Bit1 Bit2 Bit3 Bit0 Bit1 Bit2 Bit3 Bit0 Bit1 Bit2 Bit3 SEG1 Bit0 Bit1 Bit2 Bit3 Bit0 Bit1 Bit2 Bit3 Bit0 Bit1 Bit2 Bit3 Bit0 Bit1 Bit2 Bit3 SEG2 SEG3 22FH 233H 22EH 232H 22DH 231H 22CH 230H 234H Bit0 Bit1 Bit2 Bit3 235H Bit0 Bit1 Bit2 Bit3 236H Bit0 Bit1 Bit2 Bit3 237H Bit0 Bit1 Bit2 Bit3 238H Bit0 Bit1 Bit2 Bit3 239H Bit0 Bit1 Bit2 Bit3 23AH Bit0 Bit1 Bit2 Bit3 23BH Bit0 Bit1 Bit2 Bit3 23CH Bit0 Bit1 Bit2 Bit3 23DH Bit0 Bit1 Bit2 Bit3 23EH Bit0 Bit1 Bit2 Bit3 23FH Bit0 Bit1 Bit2 Bit3
SEG140 SEG141 SEG142 SEG143
Selection Mode Mapping Table Name Mode Command Code X100-0001-1111-XXXX Function Change segment from common from
default value after power reset mode, command will change mode mode. Frame Frequency HT1670 provides three kinds frame frequency option command code; 64Hz, 89Hz 170Hz respectively. FRAME 64Hz provides 64Hz frame frequency. FRAME 89Hz provides 89Hz frame frequency. FRAME 170Hz provides 170Hz frame frequency. Name FRAME 170Hz FRAME 89Hz FRAME 64Hz Command Code X100-0001-1000-XXXX X100-0001-1101-XXXX X100-0001-1110-XXXX Function Select 170Hz frame frequency Select 89Hz frame frequency Select 64Hz frame frequency
Frame Frequency Selection Command Code Time Base Watchdog Timer time base generator share same counter which divided 256. clock programmed 1Hz, 2Hz, 128Hz output. TIMER DIS/EN/CLR, DIS/EN/CLR EN/DIS independent from each other. Once time-out occurs, will remain logic level until command issued. external clock selected system frequency source, command turns invalid power down mode fails carried until external clock source removed.
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HT1670
Buzzer Tone Output simple tone generator implemented HT1670. tone generator output pair differential driving signals which used generate single tone. executing TONE TONE commands there tone frequency outputs selectable that turn tone output. TONE TONE commands tone frequency 4kHz 2kHz, respectively. tone output turned invoking TONE command. tone outputs, namely pair differential driving outputs used drive piezo buzzer. Once system disabled tone output inhibited, outputs will remain level. Command Format HT1670 configured software setting. There mode commands configure HT1670 resource transfer display data. configuration mode HT1670 called command mode, command mode 100. command mode consists system configuration
command, system frequency selection command, configuration command, tone frequency selection command, bias current selection command, timer/WDT setting command, operating command. data mode, other hand, includes READ, WRITE, READ-MODIFY-WRITE operations. following data mode command mode Operation READ WRITE READ-MODIFY-WRITE COMMAND Mode Data Data Data Command
successive commands have been issued, command mode omitted. While system operating non-successive command non-successive address data mode, should previous operation mode will also reset. returns operation mode should issued first.
Time Base Configurations
Name TONE TONE TONE
Command Code X100-0000-1000-XXXX X100-0001-0000-XXXX X100-0001-0001-XXXX Turn-off tone output
Function
Turn-on tone output, tone frequency 4kHz Turn-on tone output, tone frequency 2kHz
Buzzer Tone Output Command Code following data mode command Operation READ WRITE READ-MODIFY-WRITE COMMAND Mode Data Data Data Command
successive commands have been issued, command mode omitted. While system operating non-successive address data mode, should previous operation mode will also reset. returns operation mode should issued first.
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HT1670
Bias Generator HT1670 bias voltage belongs internal resistor type. provides kinds bias option named bias bias respectively. also provides three kinds bias current option programming suitably drive panel. three kinds bias current large, middle, small, respectively. Usually, large panel excellently displayed large bias current. Relatively, consumes large current when command used. Small bias current provides power consumption during condition when normally displayed. following reference value table. Interfacing Only lines required interface with HT1670. line used initialize serial interface circuit terminate communication between host controller HT1670. data command issued between host controller HT1670 first disabled then initialized. Bias 225mA 90mA 40mA 270mA 140mA 110mA 55mA 50mA 25mA VLCD Large Bias Current 165mA Before issuing mode command mode switching, high level pulse required initialize serial interface HT1670. DB0~DB3 4-bit parallel data input/output lines. Data read written commands written have pass through DB0~DB3 lines. line READ clock input. Data clocked falling edge signal, clocked data will then appear DB0~DB3 lines. recommended that host controller read correct data during interval between rising edge next falling edge signal. line WRITE clock input. data, address, command DB0~DB3 lines clocked into HT1670 rising edge signal. There optional line used interface between host controller HT1670. selected timer output overflow flag output setting. host controller perform time base function connecting with HT1670.
Middle Bias Current 70mA
Small Bias Current 30mA
Internal Resistor Type Bias Generator Configurations
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HT1670
Timing Diagrams
READ Mode (Command Code:
WRITE Mode (Command Code:
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HT1670
READ-MODIFY-WRITE Mode (Command Code:
Command Mode (Command Code:
Note: stands care
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HT1670
Application Circuits
Host Controller With HT1670 Display System
Note:
connection selected depending MCU. Adjust display Adjust (external pull-high resistance) time base clock.
Instruction Summary
Name READ WRITE Command Code Function Read data from Write data Read Write data Turn both system oscillator bias generator Turn system oscillator Turn display Turn display Disable time base output Disable time-out flag output Enable time base output Enable time-out flag output Turn tone outputs Clear contents time base generator Clear contents stage Turn tone output, tone frequency output: 4kHz Def.
READ-MODIFY- D3D2D1D0 TIMER TIMER TONE TIMER TONE X100-0000-0000-XXXX-XXXX X100-0000-0001-XXXX-XXXX X100-0000-0010-XXXX-XXXX X100-0000-0011-XXXX-XXXX X100-0000-0100-XXXX-XXXX X100-0000-0101-XXXX-XXXX X100-0000-0110-XXXX-XXXX X100-0000-0111-XXXX-XXXX X100-0000-1000-XXXX-XXXX X100-0000-1101-XXXX-XXXX X100-0000-1111-XXXX-XXXX X100-0001-0000-XXXX-XXXX
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HT1670
Name TONE LARGE BIAS MIDDLE BIAS SMALL BIAS BIAS BIAS FRAME 170Hz FRAME 89Hz FRAME 64Hz Select F128 TEST NORMAL Note: Command Code X100-0001-0001-XXXX-XXXX X100-0001-0010-XXXX-XXXX X100-0001-0011-XXXX-XXXX X100-0001-0100-XXXX-XXXX X100-0001-0101-XXXX-XXXX X100-0001-0110-XXXX-XXXX X100-0001-0111-XXXX-XXXX X100-0001-1000-XXXX-XXXX X100-0001-1010-XXXX-XXXX X100-0001-1001-XXXX-XXXX X100-0001-1100-XXXX-XXXX X100-0001-1101-XXXX-XXXX X100-0001-1110-XXXX-XXXX X100-0001-1111-XXXX-XXXX X100-1010-0000-XXXX-XXXX X100-1010-0001-XXXX-XXXX X100-1010-0010-XXXX-XXXX X100-1010-0011-XXXX-XXXX X100-1010-0100-XXXX-XXXX X100-1010-0101-XXXX-XXXX X100-1010-0110-XXXX-XXXX X100-1010-0111-XXXX-XXXX X100-1111-1111-XXXX-XXXX X100-1111-1110-XXXX-XXXX Function Turn tone output, tone frequency output: 2kHz Disable output Enable output System clock source, on-chip oscillator System clock source, external 32kHz clock source crystal oscillator 32.768kHz Large bias current option Middle bias current option Small bias current option bias option bias option Selects 170Hz frame frequency Selects 89Hz frame frequency Selects 64Hz frame frequency This command will change segment from command from Time base clock output: time-out flag after: Time base clock output: time-out flag after: Time base clock output: time-out flag after: Time base clock output: time-out flag after: 1/2s Time base clock output: 16Hz time-out flag after: 1/4s Time base clock output: 32Hz time-out flag after: 1/8s Time base clock output: 96Hz time-out flag after: 1/16s Time base clock output: 128Hz time-out flag after: 1/32s Test mode, user use. Normal mode, mode will Def.
stands care A9~A0: address D3~D0: data D/C: Data/Command mode Def.: Power-on reset default bold forms, namely mode commands. these, indicates command mode successive commands have been issued, command mode except first command will omitted. tone frequency source time base/WDT clock frequency source derived from on-chip 32kHz oscillator, 32.768kHz crystal oscillator, external 32kHz clock. Calculation frequency based system frequency sources stated above. recommended that host controller should initialize HT1670 after power-on reset, otherwise, power reset fail, which turn leads malfunctioning HT1670.
Rev. 1.00
September 2003
HT1670
Package Information
208-pin Outline Dimensions
Symbol
Dimensions Min. 27.90 27.90 3.10 0.35 0.10 Nom. 0.50 0.20 0.10 Max. 31.40 28.10 31.40 28.10 3.40 3.70 0.65 0.20
Rev. 1.00
September 2003
HT1670
Holtek Semiconductor Inc. (Headquarters) No.3, Creation Science Park, Hsinchu, Taiwan Tel: 886-3-563-1999 Fax: 886-3-563-1189 http://www.holtek.com.tw Holtek Semiconductor Inc. (Sales Office) 4F-2, 3-2, YuanQu St., Nankang Software Park, Taipei 115, Taiwan Tel: 886-2-2655-7070 Fax: 886-2-2655-7373 Fax: 886-2-2655-7383 (International sales hotline) Holtek Semiconductor (Shanghai) Inc. Floor, Building No.889, Shan Rd., Shanghai, China Tel: 021-6485-5560 Fax: 021-6485-0313 http://www.holtek.com.cn Holtek Semiconductor (Hong Kong) Ltd. Block 3/F, Industrial Building, 777-779 Cheung Rd., Kowloon, Hong Kong Tel: 852-2-745-8288 Fax: 852-2-742-8657 Holmate Semiconductor, Inc. 46712 Fremont Blvd., Fremont, 94538 Tel: 510-252-9880 Fax: 510-252-9885 http://www.holmate.com Copyright 2003 HOLTEK SEMICONDUCTOR INC. information appearing this Data Sheet believed accurate time publication. However, Holtek assumes responsibility arising from specifications described. applications mentioned herein used solely purpose illustration Holtek makes warranty representation that such applications will suitable without further modification, recommends products application that present risk human life malfunction otherwise. products authorized critical components life support devices systems. Holtek reserves right alter products without prior notification. most up-to-date information, please visit site http://www.holtek.com.tw.
Rev. 1.00
September 2003

Operating voltage: 2.7V~5.2V Built-in 32kHz oscillator External 32.768

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