VER2.1 SPECIFICATION SC802B AKIHABARA INC. Page SC
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SC802B
VER2.1
SPECIFICATION SC802B
AKIHABARA INC.
Page
SC802B
CONTENT
VER2.1
General description Maximum absolute limit-3 Mechanical characteristics-3 Physical data External dimensions Electrical characteristics-4 characteristics characteristics backlight backlight Operating Principles-6 description Block diagram Instruction description Operating Methods-13 Interface with Power supply Operating example
AKIHABARA INC.
Page
SC802B
General description
VER2.1
SC802B, dot-matrix character module, design displaying line characters. Character font dots with cursor. SC802B provides types interfaces MPU: 4-bit SC802B includes backlight custom design. custom design color backlight, viewing angle type.
Maximum absolute limit
Characteristics Operating Voltage Driver Supply Voltage Input Voltage Range Operating Temperature Symbol VLCD Ratings -0.3V +7.0V 0.3V -0.3V 0.3V -10°C to+60°C -20°C to+60°C Normal temperature Wide temperature Remark
Storage Temperature TSTO -25°C to+70°C Note: Stresses beyond those given Absolute Maximum Rating table cause operational errors damage device.
Mechanical characteristics
Physical data ITEM Number characters Module size Viewing area Active area Character size Character pith Approx. weight Drive method External dimensions 1/5bias 1/16 duty Standard value Unit Remark
58.00±0.5 53.00±0.3 44.20±0.3 38.00±0.3 26.93 12-R0.50
0.43 0.43
13.60 1.50 10.00
PITCH 2.54*5=12.70
5.00 12.00 16.00±0.3 27.00±0.3 32.00±0.5 1.60
0.65 0.06
0.06 0.55
1.70 2.54
4-R1.25
UNIT:
AKIHABARA INC.
Page
SC802B
Electrical characteristics
characteristics a.1) CHARACTERISTICS 4.5V) Limit Characteristics Symbol Min. Input High Voltage Input Voltage Input High Current Input Current Output High Voltage Output Voltage Voltage Operating Current Vlcd 0.7VDD -0.3 -1.0 -5.0 Typ. Max. 0.55
VER2.1
Unit
Test Condition
3.0V
0.75VDD 4.5v
0.1mA Pins: DB7-0
0.2VDD
|OL= 0.1mA Pins: DB7-0
Note: a.2) CHARACTERISTICS 25°C, 5.5V) Characteristics Symbol Limit Min. Input High Voltage Input Voltage Input High Current Input Current Output High Voltage Output Voltage Voltage Operating Current Vlcd -0.3 -2.0 Typ. Max. -100
Unit
Test Condition
5.0V 0.1mA Pins: DB7-0 IOL= 0.1mA Pins: DB7-0
Note: characteristics b.1) CHARACTERISTICS 25°C, 4.5V) Write Mode (Writing data from module) Characteristics Symbol Limit Min. Cycle Time Pulse Width Rise/Fall Time Address Setup Time Address Hold Time Data Setup Time Data Hold Time tR,tF tsp-i tHD1 tsP2 tHD2 1000 Typ. Max.
Unit
Test Condition PinE PinE PinE Pins: R/W, Pins: R/W, Pins: DB7-0 Pins: DB7-0
AKIHABARA INC.
Page
SC802B
Read Mode (Reading data from module MPU) Limit Characteristics Symbol Max. Min. Typ. Cycle Time 1000 Pulse Width Rise/Fall Time tR,tF Address Setup Time tsp-i Address Hold Time tHD1 Data Output Delay Time Data hold time tHD2 b.2) CHARACTERISTICS 25°C, 5.5V) Write Mode (Writing Data from module) Limit Characteristics Symbol Min. Typ. Max. Cycle Time Pulse Width Rise/Fall Time tR,tF Address Setup Time tsp-i tHD1 Address Hold Time tsP2 Data Setup Time Data Hold Time tHD2 Read Mode (Reading Data from module MPU) Limit Characteristics Symbol Typ. Min. Cycle Time Pulse Width Rise/Fall Time tR,tF tsp-i Address Setup Time Address Hold Time tHD1 Data Output Delay Time Data hold time tHD2 Unit
VER2.1
Test Condition PinE PinE PinE Pins: R/W,E Pins: R/W,E Pins: DB7-0 DB7-
Unit Unit
Test Condition PinE PinE PinE Pins: R/W, Pins: R/W, Pins: DB7-0 Pins: DB7-0 Test Condition Pins: R/W,E Pins: R/W,E Pins: DB7-0 DB7-0
Max.
AKIHABARA INC.
Page
SC802B
TIMING CHARACTERISICS
VER2.1
Write Timing
Read Timing
Operating Principles
description Symbol Level 2.7V~5.5V 4.2V Function Data bits Read signal Write signal enable signal Variable voltage Instruction code Data Ground Supply voltage logic Supply voltage LED-Backlight Supply voltage LED-Backlight
AKIHABARA INC.
Page
SC802B
Block Diagram
D0-D3 D4-D7
VER2.1
Timing Control Circuit
Cursor blink CKT. Driving Circuit
Driving Circuit
BUSY FLAG
registor
Data Register (DR): Dris register used temporary Storage data read/write form/into RAM. Instruction Register (IR): register available storing instruction codes address information display data (DD) character generator (CG) RAM. BUSY FLAG (BF): When Busy Flag "1",it shows that internal operation accept next instruction. Character Generator (CG) ROM: This Generates character pattern from 8-bit character code provides character patterns. Character Generator (CG)RAM: This allows user rewrite character patterns freely according program. Address Counter (AC): This address counter used give address information RAM. Display Data (DD) RAM: This display data used store display data expressed 8-bit character code capacity 8bits data characters storage. Cursor Blink Control Circuit: This circuit generates cursor blink.
AKIHABARA INC.
Page
SC802B
RAM's address LCD's position shown bellows. Display Character address code: Display position DDRAM Address
VER2.1
Relationship between Character Code (DDRAM) character Pattern (CGRAM)
Character code Data Address Character Pattern Data
means that bit0~2 character code correspond bit3~5 address.
these areas used display, used general data RAM. When bit4-7 character code character patterns selected. Selected," selected," care example (1), character code b7-b4 display" That means character code (00)16, (08)16 display" character. bits character code character pattern line position. line cursor position display formed logical with cursor
AKIHABARA INC.
Page
SC802B
CGROM Character Code Table:
Upper 4bit Lower 4bit
VER2.1
LLLL LLLH LLHL LLHH LHLL LHLH LHHL LHHH HLLL HLLH HLHL HLHH HHLL HHLH HHHL HHHH
LLLL
LLLH
LLHL
LLHH
LHLL
LHLH
LHHL
LHHH
HLLL
HLLH
HLHL
HLHH
HHLL
HHLH
HHHL
HHHH
AKIHABARA INC.
Page
SC802B
Instruction description
VER2.1
Control display instructions will show details following: c.1) Clear Display clears whole display sets display data RAM's address address counter. c.2) Return Home care sets display data RAM's address address counter display returns original position. cursor blink goes left edge display line lines displayed). contents Display Data change. c.3) Entry Mode During writing reading data, sets cursor move direction shifts display. Increment, Decrement. display shift, display does shift I/D= shifts display left I/D=0 shifts display right c.4) Display On/Off Control
Display Display Cursor Cursor Blinks Blinks c.5) Cursor Display Shift Without changing RAM's daters, move cursor shift display Description Address Counter Shift cursor left Shift cursor right Shift display left. Cursor follows display shift AC=AC Shift display right. Cursor follows display shift AC=AC c.6) Function care sets interface data length. Datas transferred with 8-bit lengths (DB7 0).DL Datas transferred with 4-bit lengths (DB7 needs times transfer datas) sets number display line. One-line display. Two-line display. sets character font. dots character font. dots character font. Display Lines Character Font Duty Factor dots dots dots
AKIHABARA INC.
Page
SC802B
VER2.1
c.7) Character Generator Address sets character generator address (aaaaaa)2 address counter. Character generator data read write after this setting. c.8) Display Data Address sets display data address (aaaaaaa)2 address counter. Display data read write after this setting. one-line display (aaaaaaa)2; (OO)16 (4F)16 two-line display (aaaaaaa)2: (00)16 (27)16,gfor first line, (aaaaaaa)2: (40)16 (67)16,gfor second line. c.9) Read Busy Flag Address When indicates that system busy now, will accept instruction until busy same time, address counter content's (aaaaaaa)2; read out. c.10) Write Data Character Generator Display Data writes data (dddddddd)2 character generator display data RAM. c.11) Read Data from Character Generator Display Data reads data (dddddddd)2 from character generator display data RAM. correct data readout shown below: ()Set address character generator display data shift cursor instruction. (ii) Send "Read "instruction.
AKIHABARA INC.
Page
SC802B
Instruction table Instruction Code Instruction Clear Display Return Home Description Write "20H" DDRAM 1.52ms DDRAM address "OOH" from DDRAM address 1.52ms "OOH" from return cursor original position shifted. contents DDRAM changed. Assign cursor moving direction enable shift entire display display(D), cursor(C), blinking cursor(B) on/off control bit. cursor moving display shift control bit, direction, without changing DDRAM data. interface data length (DL: 8-bit/4-bit), numbers display line 2-line/1line) and, display font type (F:5x10dots/5x8dots) 38us
VER2.1
Execution time (fosc=270KHz)
Entry Mode Display Cursor Display Shift Function
38us
38us
38us
CGRAM Address DDRAM Address Read Busy Flag Address Counter
CGRAM address address counter.
38us
DDRAM address counter
38us
Whether during internal operation known reading contents address counter also read. Write data into internal (DDRAM/CGRAM). Read data from internal (DDRAM/CGRAM).
38us
Write Data Read Data from
38us
38us
AKIHABARA INC.
Page
SC802B
Operating Methods
Interface with
VER2.1
6800
AKIHABARA INC.
Page
SC802B
Power supply
VER2.1
Single Supply Voltage Types
Dual Supply Voltage Types
VDD-VO 10k~20k
VDD-V0
10k~20k
VDD-VO:LCD driving voltage
VDD-VO:LCD driving voltage
Operating example 4-Bit operation 8-digit 1-line display (using internal reset) Instruction Display Power SPLC780A1 starts initializing Function Function
Operation Power reset. display. 4-bit operation
4-bit operation select 1-line display line character font.
Display control
Display Cursor appears.
Entry mode
Increase address one. will shift cursor right when writing RAM. display shift. Write cursor incremented shifted right.
Write data
Reset function power starts internal auto-reset circuit executes initial instructions There initial procedures shown bellows:
AKIHABARA INC.
Page
SC802B
Power
VER2.1
4bits interface
Waite time 15ms after VDD>4.5V
cannot checked before this instruction Function (interface bits length).
Wait time 4.1ms
cannot checked before this instruction Function (interface bits length).
Wait time 100us
cannot checked before this instruction Function (interface bits length).
cannot checked after following Instructions Function (set interface bits length) Interface bits length Function (interface bits length. specify number display lines character Font.) number display lines character cannot changed afterwards. Display Display clear Entry mode
Initialization
AKIHABARA INC.
Page
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