
CHAPTER 4 PORT FUNCTIONS
63
Table 4-1. Port Functions (2/2)
Alternate
Function
Pin
Pin Name
Function
P80, P81
Port 8.
P-ch open-drain 2 bits high breakdown voltage output ports.
LEDs can be driven directly.
Mask ROM version can specify pull-down resistors bit-wise with the mask option
(can be specified to V
LOAD
or V
SS
in 2-bit units).
μ
PD78P048A contains a pull-down resistor (connected to V
LOAD
).
FIP0, FIP1
P90 to P97
Port 9.
P-ch open-drain 8-bit high breakdown voltage output ports.
LEDs can be driven directly.
Mask ROM version can specify pull-down resistors bit-wise with the mask option
(can be specified to V
LOAD
or V
SS
in 4-bit units).
μ
PD78P048A contains a pull-down resistor (connected to V
LOAD
).
FIP2 to FIP9
P100 to P107
Port 10.
P-ch open-drain 8-bit high breakdown voltage output ports.
P100 to P105 can drive LEDs directly.
Mask ROM version can specify pull-down resistors bit-wise with the mask option
(can be specified to V
LOAD
or V
SS
in 4-bit units).
μ
PD78P048A contains pull-down resistors in P100 to P105 (connected to V
LOAD
).
FIP10 to FIP17
P110 to P117
Port 11.
P-ch open-drain 8-bit high breakdown voltage input/output ports.
Can specify input/output bit-wise.
P110 to P117 can drive LEDs directly.
Only mask ROM version can specify pull-down resistors bit-wise with the mask option
(can be specified to V
LOAD
or V
SS
in 4-bit units).
FIP18 to FIP25
P120 to P127
Port 12.
P-ch open-drain 8-bit high breakdown voltage input/output ports.
Can specify input/output bit-wise.
P120 to P127 can drive LEDs directly.
Mask ROM version can specify pull-down resistors bit-wise with the mask option
(can be specified to V
LOAD
or V
SS
in 4-bit units).
FIP26 to FIP33