S6B1713
65 COM / 132 SEG DRIVER & CONTROLLER FOR STN LCD
MICROPROCESSOR INTERFACE
Table 6. Microprocessor Interface Pin Description
Name
RESETB
I/O
I
Description
Reset input pin
When RESETB is 鈥淟鈥? initialization is executed.
Parallel / Serial data input select input
PS
H
L
Interface
mode
Parallel
Serial
Chip
select
CS1B,
CS2
CS1B,
CS2
Data /
instruction
RS
RS
Data
DB0 to DB7
SID(DB7)
Read / Write
E_RD
RW_WR
Write only
Serial clock
-
SCLK(DB6)
PS
I
*NOTE: In serial mode, it is impossible to read data from the on-chip RAM. And DB0 to DB5
are high impedance and E_RD and RW_WR must be fixed to either 鈥淗鈥?or 鈥淟鈥?
MI
CS1B
CS2
RS
I
Microprocessor interface selects input pin
鈭?/div>
MI = "H": 6800-series MPU interface
鈭?/div>
MI = "L": 8080-series MPU interface
Chip select input pins
Data / instruction I/O is enabled only when CS1B is 鈥淟鈥?and CS2 is 鈥淗鈥?
When chip select is non-active, DB0 to DB7 may be high impedance.
Register select input pin
鈭?/div>
RS = "H": DB0 to DB7 are display data
鈭?/div>
RS = "L": DB0 to DB7 are control data
Read / Write execution control pin
MI
H
RW_WR
I
L
8080-series
/WR
MPU type
6800-series
RW_WR
RW
Description
Read / Write control input pin
鈭?/div>
RW = 鈥淗鈥? read
鈭?/div>
RW = 鈥淟鈥? write
Write enable clock input pin
The data ON DB0 to DB7 are latched at the rising
edge of the /WR signal.
I
I
11
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