NEC PD78052 User Manual page 60

(1) Port pins (2/3)
Pin Name
Input/Output
P30
P31
P32 Port 3.
P33 Input/ 8-bit input/output port.
P34 output Input/output mode can be specified in 1-bit units.
P35 When used as an input port, an on-chip pull-up resistor can be used by
P36 software.
P37
Port 4.
8-bit input/output port.
Input/ Input/output mode can be specified in 8-bit units.
P40 to P47
output When used as an input port, an on-chip pull-up resistor can be used by
software.
Test input flag (KRIF) is set to 1 by falling edge detection.
Port 5.
8-bit input/output port.
Input/ LED can be driven directly.
P50 to P57
output Input/output mode can be specified in 1-bit units.
When used as an input port, an on-chip pull-up resistor can be used by
software.
P60
P61
P62 Port 6.
P63 Input/ 8-bit input/output port.
P64 output Input/output mode can be
P65 specified in 1-bit units.
P66
P67
Port 7.
P70
3-bit input/output port.
Input/
P71 Input/output mode can be specified in 1-bit units.
output
When used as an input port, an on-chip pull-up resistor can be used by
P72
software.
60
CHAPTER 3 PIN FUNCTION ( PD78054 Subseries)
Function
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.
When used as an input port, an
on-chip pull-up resistor can be used
by software.
After Reset Alternate Function
TO0
TO1
TO2
TI1
Input
TI2
PCL
BUZ
—
Input AD0 to AD7
Input A8 to A15
—
Input RD
WR
WAIT
ASTB
SI2/RxD
Input SO2/TxD
SCK2/ASCK