NEC uPD78P078 - Manual (Page 84)

84
CHAPTER 4 PIN FUNCTION (
µ
PD78078Y SUBSERIES)
Input
P40 to P47 Input AD0 to AD7
(1) Port pins (2/3)
Pin Name Input/Output Function After Reset Alternate Function
P30 TO0
P31 TO1
P32 Port 3. TO2
P33 Input/ 8-bit input/output port. TI1
P34 output Input/output mode can be specified bit-wise. TI2
P35 If used as an input port, an on-chip pull-up resistor can be connected by PCL
P36 software. BUZ
P37 —
Port 4.
8-bit input/output port.
Input/ Input/output mode can be specified in 8-bit units.
output If used as an input port, an on-chip pull-up resistor can be connected by
software.
Test input flag (KRIF) is set to 1 by falling edge detection.
Port 5.
8-bit input/output port.
P50 to P57
LEDs can be driven directly.
Input A8 to A15
Input/output mode can be specified bit-wise.
If used as an input port, an on-chip pull-up resistor can be connected
by software.
P61
P62 Port 6. —
P63 Input/ 8-bit input/output port.
P64 output Input/output mode can be If used as an input port, an on-chip Input RD
P65 specified bit-wise. pull-up resistor can be connected WR
P66 by software. WAIT
P67 ASTB
Port 7.
Input/
3-bit input/output port.
output
Input/output mode can be specified bit-wise.
If used as an input port, an on-chip pull-up resistor can be connected
by software.
Port 8.
Input/
8-bit input/output port.
output
Input/output mode can be specified bit-wise.
If used as an input port, an on-chip pull-up resistor can be connected
by software.
N-ch open drain input/output port.
On-chip pull-up resistor can be
specified by mask option.
(Mask ROM version only).
LEDs can be driven directly.
Input/
output
P70 SI2/RxD
P71 Input SO2/TxD
P72 SCK2/ASCK
P80 to P87 Input A0 to A7