NEC PD78F9488 - Manual (Page 42)

CHAPTER 2 PIN FUNCTIONS
User’s Manual U15331EJ4V1UD
42
2.2.6 P60 to P67 (Port 6)
This is an 8-bit input-only port. In addition to a general-purpose input port function, it has A/D converter input and
key return signal detection Note functions.
(1) Port
mode
In this mode, P60 to P67 function as an 8-bit input-only port.
(2) Control
mode
In this mode, P60 to P67 function as the analog inputs of the A/D converter and key return signal detection
pins
Note .
(a) ANI0 to ANI7
These are the analog input pins of the A/D converter.
(b) KR10 to KR17 Note
These are the key return signal detection pins.
Note
µPD789489 and 78F9489 only
2.2.7 P70 to P73 (Port 7)
These pins constitute a 4-bit input-only port. This port can be used only when the port function is selected by a
mask option in the µPD789488, 789489 or by a port function register in the µPD78F9488, 78F9489.
2.2.8 P80 to P87 (Port 8)
These pins constitute an 8-bit I/O port. Port 8 can be set in the input or output mode in 1-bit units by port mode
register 8 (PM8). This port can be used only when the port function is selected by a mask option in the µPD789488,
789489 or by a port function register in the µPD78F9488, 78F9489.
2.2.9 S0 to S27 Note
These pins are the segment signal output pins for the LCD controller/driver.
Note Pins S16 through S27 can be used only when segment output is selected by a mask option in the
µPD789488, 789489 or by a port function register in the µPD78F9488, 78F9489.
2.2.10 COM0 to COM3
These pins are the common signal output pins for the LCD controller/driver.
2.2.11 V
LC0
to V
LC2
These pins are the power supply voltage pins for driving the LCD.
2.2.12 CAPH, CAPL
These pins are the capacitor connection pins for driving the LCD.