4-Level Gray Scale Controller Operating voltage: 2.7V~5.2V Built-
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HT1647
4-Level Gray Scale Controller
Operating voltage: 2.7V~5.2V Built-in 32kHz oscillator External 32.768kHz crystal oscillator 32kHz frequency source input Standby current Internal resistor type: bias bias, 1/16 duty selectable frame frequencies: 89Hz 170Hz Max. patterns, segments commons Built-in bit-map display RAM: 2048 bits bits) Built-in internal resistor type bias generator 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 Provides three kinds bias current programming Control TN-type, STN-type LCDs ECB-type LCDs Four-level gray scale output TN-type, STN-type LCDs panel Four-color output ECB-type LCDs panel Available 100-pin chip form
Applications
Toys Games Personal digital assistant
Cellular phone Global positioning system Consumer electronics
General Description
HT1647 peripheral device specially designed type used expand display capability. max. display segment device 1024 patterns segments commons). also supports four data bits interface, buzzer sound, watchdog timer time base timer functions. HT1647 memory mapping multi-function controller. Since HT1647 control ECB-type (Electrically Controlled Birefringence) LCDs addition current TN-type (Twisted Nematic) STN-type (Super Twisted Nematic) LCDs, support 4-color display well 4-level gray scale display. displays 4-level gray scale output when HT1647 drives TN-type, STN-type LCDs. displays four color output when HT1647 drives ECB-type. HT1647 uses (Pulse Width Modulation) technique. software configuration feature HT1647 make suitable multiple applications including modules display subsystems. Only lines (CS, DB0~DB3) required interface between host controller HT1647. HT164X series have many kinds products that match various applications.
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HT1647
4-Level Gray Scale Controller Product Line Selection Table
HT164X
Under development
*HT1642
*HT1645
HT1647
Assignment
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HT1647
Block Diagram
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HT1647
Assignment
Chip size: 3865 3770 (µm)2 substrate should connected layout artwork.
Coordinates
-1774.50 -1779.30 -1779.30 -1779.30 -1779.30 1708.30 1409.80 1281.80 1150.00 1022.00 1775.70 1775.70 1775.70 1775.70 1775.70
Unit:
-1283.10 -1151.30 -1023.30 -891.50 -763.50
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HT1647
-1779.30 -1779.30 -1779.30 -1779.30 -1779.30 -1779.30 -1779.30 -1779.30 -1779.30 -1779.30 -1779.30 -1779.30 -1779.30 -1779.30 -1779.30 -1779.30 -1779.30 -1690.00 -1690.00 -1690.00 -1430.20 -1294.80 -1149.50 -1013.90 -872.80 -738.30 -600.10 -465.60 -331.40 -194.50 -48.00 87.40 235.20 383.40 530.40 678.60 875.00 1003.00 1134.80 1262.80 1394.60 1522.60 1654.40 1782.40 1775.70 890.20 762.20 630.40 502.40 370.60 242.60 110.80 -17.20 -149.00 -277.00 -408.80 -536.80 -668.60 -796.60 -928.80 -1056.80 -1189.00 -1375.40 -1515.40 -1651.00 -1599.90 -1599.90 -1599.90 -1599.90 -1600.00 -1600.00 -1600.00 -1600.00 -1600.00 -1558.30 -1600.00 -1600.00 -1600.00 -1600.00 -1600.00 -1600.00 -1712.30 -1712.30 -1712.30 -1712.30 -1712.30 -1712.30 -1712.30 -1712.30 -1411.10 1775.70 1775.70 1775.70 1775.70 1775.70 1775.70 1775.70 1775.70 1775.70 1775.70 1775.70 1775.70 1775.70 1775.70 1775.70 1775.70 1775.70 1775.70 1775.70 1471.10 1343.10 1211.30 1083.30 951.50 823.50 691.70 563.70 431.90 303.90 172.10 44.10 -87.70 -215.70 -347.50 -475.50 -607.30 -735.30 -867.10 -995.10 -1126.90 -1254.90 -1386.70 -1514.70 -1646.50 -631.70 -503.70 -371.90 -243.90 -112.10 15.90 147.70 275.70 407.50 535.50 667.30 795.30 927.10 1055.10 1186.90 1314.90 1446.70 1574.70 1706.50 1708.30 1708.30 1708.30 1708.30 1708.30 1708.30 1708.30 1708.30 1708.30 1708.30 1708.30 1708.30 1708.30 1708.30 1708.30 1708.30 1708.30 1708.30 1708.30 1708.30 1708.30 1708.30 1708.30 1708.30 1708.30
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HT1647
Description
Name Description
Chip selection input with pull-high resistor. When logic high, data command read from write HT1647 disabled. serial interface circuit also reset. logic level input pad, data command transmission between host controller HT1647 enabled. READ clock input with pull-high resistor. Data HT1647 clocked rising edge signal. clocked data will appear data line. host controller next falling edge latch clocked data. WRITE clock input with pull-high resistor. Data DATA line latched into HT1647 rising edge signal.
26~29 38~41 42~57 58~99, 1~22
DB0~DB3 OSCI OSCO VLCD T1~T4 COM0~COM15 SEG0~SEG63
Parallel data input/output with pull-high resistor Negative power supply logic circuit, 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 instead, 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 common outputs segment outputs
Absolute Maximum Ratings*
Supply Voltage -0.3V 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 "Absolute Maximum Ratings" 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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D.C. Characteristics
Symbol
IDD1 IDD2 IDD11 IDD22 ISTB IOL1 IOH1 IOL2 IOH2 IOL3 IOH3 IOL4 IOH4 Ta=25°C
Parameter
Operating Voltage Operating Current Operating Current Operating Current Operating Current Standby Current Input Voltage Input High Voltage 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
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 DB0~DB3, 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,
Min. Typ. Max. Unit
-0.9 -0.9 -1.8 -1.8 -100
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A.C. Characteristics
Symbol
fSYS1 fSYS2 fSYS3 fLCD1 fLCD2 fLCD3 tCOM fCLK1 fCLK2 Ta=25°C
Parameter
System Clock System Clock System Clock Frame Frequency Frame Frequency Frame Frequency Common Period 4-Bit Data Clock Pin) 4-Bit Data Clock Pin) 4-Bit Interface Reset Pulse Width (Figure
Test Conditions
Conditions
On-chip oscillator Crystal oscillator External clock source On-chip oscillator Crystal oscillator External clock source Number Duty cycle Duty cycle Write mode Read mode Write mode Read mode
Min.
3.34 6.67 1.67 3.34
Typ.
32.768 32.768 n/fLCD
Max. Unit
tCLK
Input Pulse Width (Figure
tsu1
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
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HT1647
Figure
Figure
Figure
Functional Description
System oscillator
HT1647 system clock used generate time base/watchdog timer (WDT) clock frequency, driving clock, tone frequency. source clock 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 however, available only on-chip oscillator crystal oscillator. Once system clock stops, display will become blank, time base/WDT loses function well.
command used turn bias generator off. After bias generator switches issuing command, using command reduces power consumption, 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 HT1647 state.
System oscillator configuration
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Display memory structure
static display organized into bits stores display data. bits Lad's pixel decide whether 4-level gray scale 4-color display concurrently. contents directly
mapped contents driver. Data accessed READ, WRITE READ-MODIFY-WRITE commands. following mapping from patterns.
Display memory structure
Gray scale level decision
Frame frequency
HT1647 uses technique provide 4-level gray scale display. bits data code ((D3, (D1, D0)) decide pixel level LCDs, level 1~level dividedly. Every level must defined kind gray scale data (namely B4~B0) previously.
data code Choice Gray Scale (D3, (D1, Level
Level Level Level Level
HT1647 provides kinds frame frequency option command code, 89Hz 170Hz respectively. FRAME 89Hz provides 89Hz frame frequency active segment signal width divided into sections concurrently. FRAME 170Hz provides 170Hz frame frequency active segment signal width divided into sections concurrently. sections display particularly gray scale more than sections data. default FRAME 89Hz.
Gray scale display
data defined gray scale level
user choose 89Hz frame frequency, max. sections programmed suit satisfactory gray scale every level. Similarly, user choose 170Hz frame frequency, max. sections programmed suit
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HT1647
Name
FRAME 170Hz FRAME 89Hz
Command Code
X100-0001-1000-XXXX X100-0001-1101-XXXX
Function
Select 170Hz frame frequency active segment signal width divided into sections Select 89Hz frame frequency active segment signal width divided into sections
Frame frequency selection command code satisfactory gray scale every level. HT1647 provides 5-bit data control length section. other words, max. gray scales generated 5-bit binary data. FRAME 89Hz mode, HT1647 only provides max. adjustable gray scales although expressed max. value bits binary code. When bits binary code value more than control circuit uniformly regards increase data indicates increase length active segment signal. varied length active segment signal displays varied gray scale TNtype, STN-type LCDs (refer table Similarly, displays varied color ECB-type LCDs. color display derived from ECB-type specification. FRAME 170Hz mode, HT1647 only provides max. adjustable gray scales although expressed max. value bits binary code. When bits binary code value more than control circuit uniformly regards user must appoint four kinds data four kinds different gray scale level commanding data (refer table
Name
LEVEL LEVEL LEVEL LEVEL
Command Code
Function
X100-001 B4-B3 B0-XXXX data gray scale level X100-010 B4-B3 B0-XXXX data gray scale level X100-011 B4-B3 B0-XXXX data gray scale level X100-100 B4-B3 B0-XXXX data gray scale level Four kinds gray scale level command code
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Example waveform type) bias, 1/16 duty cycle drive
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HT1647
Time base watchdog timer (WDT)
time base generator share same divided (/256) counter. 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.
Time base configurations
Buzzer tone output
simple tone generator implemented HT1647. tone generator output pair differential driving signals which used generate single tone. executing TONE TONE commands there tone frequency outputs selectable 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.
Name
TONE TONE TONE
Command Code
X000-1000-XXXX X001-0000-XXXX X001-0001-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
Command format
HT1647 configured software setting. There mode commands configure HT1647 resource transfer display data. configuration mode HT1647 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, gray scale level selection command, timer/WDT setting command, operating command. data mode, other hand, includes READ, WRITE, READ-MODIFY-WRITE operations.
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HT1647
following data mode command mode
Bias generator
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 "0", operation mode should issued first.
HT1647 bias voltage belong internal resistor type. provides kinds bias option named bias bias respectively. recommeaded select bias TN-type, STN-type LCDs select bias ECBtype LCDs. 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.
VLCD
Bias
Large bias current
300µA 375µA
Middle bias current
100µA 125µA
Small bias current
40µA 50µA
Internal resistor type bias generator configurations
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HT1647
Interfacing
Only lines required interface with HT1647. line used initialize serial interface circuit terminate communication between host controller HT1647. data command issued between host controller HT1647 first disabled then initialized. Before issuing mode command mode switching, high level pulse required initialize serial interface HT1647. 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,
Relationship table between data gray scale
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 HT1647 rising edge signal. There optional line used interface between host controller HT1647. selected timer output overflow flag output setting. host controller perform time base function connecting with HT1647.
Frame 89Hz mode (table
Frame 170Hz mode (table
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HT1647
Timing Diagrams
READ mode (command code
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HT1647
WRITE mode (command code
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HT1647
READ-MODIFY-WRITE mode (command code
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Command mode (command code
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HT1647
Application Circuits
Host controller with HT1647 display system
Notes: connection selected depending voltage applied VLCD must lower than Adjust display, VDD=5V, VLCD=4V, VR=15k 20%. recommended select bias TN-type, STN-type LCDs select bias fitm ECB-type LCDs. Adjust (external pull high resistance) user's time base clock.
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HT1647
Command Summary
Name
READ WRITE READMODIFYWRITE
Command Code
A8110-A7A6A5A4A3A2A1A0D3D2D1D0 A8101-A7A6A5A4A3A2A1A0D3D2D1D0 A8101-A7A6A5A4A3A2A1A0D3D2D1D0
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
Def.
X100-0000-0000-XXXX X100-0000-0001-XXXX X100-0000-0010-XXXX X100-0000-0011-XXXX
TIMER X100-0000-0100-XXXX X100-0000-0101-XXXX
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 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
TIMER X100-0000-0110-XXXX X100-0000-0111-XXXX
TONE X100-0000-1000-XXXX TIMER TONE TONE (XTAL) LARGE BIAS MIDDLE BIAS X100-0000-1101-XXXX X100-0000-1111-XXXX X100-0001-0000-XXXX X100-0001-0001-XXXX X100-0001-0010-XXXX X100-0001-0011-XXXX X100-0001-0100-XXXX
X100-0001-0101-XXXX
X100-0001-0110-XXXX X100-0001-0111-XXXX
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HT1647
Name
SMALL BIAS BIAS BIAS FRAME 170Hz FRAME 89Hz LEVEL1 LEVEL2 LEVEL3 LEVEL4 F128 TOPT NORMAL
Command Code
X100-0001-1000-XXXX X100-0001-1001-XXXX X100-0001-1010-XXXX X100-0001-1100-XXXX
Function
Small bias current option bias option bias option Select 170Hz frame frequency active segment signal width divided sections Select 89Hz frame frequency active segment signal width divided sections data gray scale level data gray scale level data gray scale level data gray scale level 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: Time base clock output: 16Hz time-out flag after: Time base clock output: 32Hz time-out flag after: Time base clock output: 64Hz time-out flag after: 1/16
Def.
X100-0001-1101-XXXX
X100-001 B4-B3 B0-XXXX X100-010 B4-B3 B0-XXXX X100-011 B4-B3 B0-XXXX X100-100 B4-B3 B0-XXXX X100-1010-0000-XXXX X100-1010-0001-XXXX X100-1010-0010-XXXX X100-1010-0011-XXXX X100-1010-0100-XXXX X100-1010-0101-XXXX X100-1010-0110-XXXX X100-1010-0111-XXXX X100-1111-1111-XXXX X100-1111-1110-XXXX
Time base clock output: 128Hz time-out flag after: 1/32 Test mode Normal mode
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Notes: Don't care A8~A0 address D3~D0 data B4~B0 data 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. source tone frequency time base/WDT clock frequency 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 HT1647 after power-on reset, power reset fail, which turn leads malfunctioning HT1647.
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