327
13.1.3
Pin Configuration
Table 13=1 shows the LCD controller/driver pin configuration.
Table 13-1
Pin Configuration
Name
Abbrev.
I/O
Function
Segment output pins
SEG
32
to SEG
1
Output
LCD segment drive pins
All pins are multiplexed as port pins
(setting programmable)
Common output pins
COM
4
to COM
1
Output
LCD common drive pins
Pins can be used in parallel with static
or 1/2 duty
Segment external expansion
CL
1
Output
Display data latch clock, multiplexed
signal pins
as SEG
32
CL
2
Output
Display data shift clock, multiplexed
as SEG
31
M
Output
LCD alternation signal, multiplexed
as SEG
29
DO
Output
Serial display data, multiplexed
as SEG
30
LCD power supply pins
V
0
, V
1
, V
2
, V
3
—
Used when a bypass capacitor is
connected externally, and when an
external power supply circuit is used
13.1.4
Register Configuration
Table 13-2 shows the register configuration of the LCD controller/driver.
Table 13-2
LCD Controller/Driver Registers
Name
Abbrev.
R/W
Initial Value
Address
LCD port control register
LPCR
R/W
H'00
H'FFC0
LCD control register
LCR
R/W
H'80
H'FFC1
LCD control register 2
LCR2
R/W
H'60
H'FFC2
LCD RAM
—
R/W
Undefined
H'F740, H'F75F
Clock stop register 2
CKSTPR2
R/W
H'FF
H'FFFB