LC7982A Datasheet, PDF (8/18 Pages) Sanyo Semicon Device – LCD Dot Matrix Graphics Display Controller

LC7982A
Pin Functions
Pin No.
21 to 28
15
17
18
16
6, 7, 8
14
1 to 4
49 to 60
30 to 37
38 to 45
13
46
11
10
19
5
47, 48
9
12
Pin
DB0 to DB7
CS
R/W
RS
E
CR, R, C
RES
MA0 to MA15
MD0 to MD7
RD0 to RD7
WE
CL2
CL1
FLM
MA
MB
D1, D2
CPO
SYNC
Function
Data bus. These are 3-state shared I/O pins and are used for data transfers to and from the microcontroller.
Chip select: The IC is set to the selected state when CS = 0.
Read/write: R/W = 1..........Microcontroller ← LC7982A
R/W = 0..........Microcontroller → LC7982A
Register select: RS = 1 ^{....Instruction} register
RS = 0 ^....Data register
Enable: Data writes are performed when E falls from high to low.
Data can be read when E = 1.
RC oscillator connections
Reset: When this pin is set 0, the display is turned off and slave mode and HP = 6 are selected.
Display RAM address outputs
In character display mode, MA12 to MA15 are output as the external CG raster address.
Display data bus: Three-state shared input and output signals
ROM data inputs: Dot data from an external character generator is input using these pins.
Write enable: The RAM write signal
Display data shift clock
Display data latch signal
Frame signal
LCD drive signal: Alternation signal ^.....Method A
LCD drive signal: Alternation signal ^.....Method B
Display data serial output: D1..............Upper screen
D2..............Lower screen
Slave mode clock
Parallel operation synchronizing signal: Three-state shared input and output signal.
Master mode: Outputs a synchronizing signal.
Slave mode: Inputs a synchronizing signal.
No. 5946-8/18