NEC uPD75P3116 User Manual
Page 10
µ
PD75P3116
10
Data Sheet U11369EJ3V0DS
3.2 Non-Port Pins (2/2)
Pin Name
I/O
Alternate
Function
Status
I/O Circuit
Function
After Reset
Type
S0 to S15
Output
—
Segment signal output
Note 1
G-A
S16 to S19
Output
P93 to P90
Segment signal output
Input
H
S20 to S23
Output
P83 to P80
Segment signal output
Input
H
COM0 to COM3 Output
—
Common signal output
Note 1
G-B
V
LC0
to
V
LC2
—
—
Power supply for driving LCD
—
—
BIAS
Output
—
Output for external split resistor cut
Note 2
—
LCDCL
Note 3
Output
P30/MD0
Clock output for driving external expansion driver
Input
E-B
SYNC
Note 3
Output
P31/MD1
Clock output for synchronization of external expansion driver
Input
E-B
Notes 1. V
LCX
(X = 0, 1, 2) is selected as the input source for the display outputs as shown below.
S0 to S23: V
LC1
, COM0 to COM2: V
LC2
, COM3: V
LC0
2. When the split resistor is incorporated:
Low level
When the split resistor is not incorporated: High impedance
3. These pins are provided for future system expansion. Currently, only P30 and P31 are used.