NEC PD78F9488 - Manual (Page 39)

CHAPTER 2 PIN FUNCTIONS
User’s Manual U15331EJ4V1UD
39
(2) Non-port pins (2/2)
Pin Name I/O Function After Reset Alternate Function
S0 to S15 LCD controller/driver segment signal outputs Low-level
output –
S16 to S19 Note 1 Only when segment output is selected by
mask option –
S20 to S27 Note 2
Output
Only when segment output is selected by
mask option –
COM0 to COM3 Output LCD controller/driver common signal outputs Low-level
output –
V
LC0
to V
LC2
– LCD drive voltage – –
CAPH, CAPL − LCD drive voltage booster capacitor connection pin – –
ANI0 to ANI7 – A/D converter analog input – P60 to P67 Note 3
P60/KR10 to
P67/KR17
Note 4
AV
SS
– A/D converter ground potential – –
AV
DD
– A/D converter analog power supply – –
X1 Input – –
X2 –
Connecting crystal resonator for main system clock oscillation
– –
XT1 Input – –
XT2 –
Connecting crystal resonator for subsystem clock oscillation
– –
RESET Input System reset input Input –
V
DD
– Positive power supply – –
V
SS
– Ground potential – –
IC0 – Internally connected. Connect directly to V
SS
. – –
V
PP
– Sets flash memory programming mode. Used to apply high
voltage when a program is written or verified. – –
Notes 1. Whether to use these pins as input ports pins (P70 to P73) or segment outputs (S16 to S19) can be
selected in 1-bit units by means of a mask option in the µPD789488, 789489 or a port mode register in
the µPD78F9488, 78F9489 (refer to 4.3(3) Port function registers and CHAPTER 20 MASK
OPTIONS).
2. Whether to use these pins as I/O port pins (P80 to P87) or segment outputs (S20 to S27) can be
selected in 1-bit units by means of a mask option in the µPD789488, 789489 or a port mode register in
the µPD78F9488, 78F9489 (refer to 4.3(3) Port function registers and CHAPTER 20 MASK
OPTIONS).
3. µPD789488 and 78F9488 only
4. µPD789489 and 78F9489 only