
10
μ
PD78052Y, 78053Y, 78054Y, 78055Y, 78056Y, 78058Y
3.
PIN FUNCTIONS
3.1
Port Pins (1/2)
Notes 1.
When using the P07/XT1 pins as an input port, set 1 in bit 6 (FRC) of the processor clock control register
(PCC). On-chip feedback resistor of the subsystem clock oscillator should not be used.
2.
When using the P10/ANI0 to P17/ANI7 pins as the A/D converter analog input pins, set port 1 to the input
mode. The pull-up resistor is disabled automatically.
Pin Name
I/O
Function
After
Reset
Alternate
Function
P00
Input
Port 0
8-bit I/O port
Input only
Input
INTP0/TI00
P01
Input/
output
Input/output can be specified bit-wise.
When used as an input port, on-chip pull-up resistor
can be used by software.
Input
INTP1/TI01
P02
INTP2
P03
INTP3
P04
INTP4
P05
INTP5
P06
INTP6
P07
Note 1
Input
Input only
Input
XT1
P10 to P17
Input/
output
Port 1
8-bit input/output port.
Input/output can be specified bit-wise.
When used as an input port, on-chip pull-up resistor can be used by
software.
Note 2
Input
ANI0 to ANI7
P20
Input/
output
Port 2
8-bit input/output port.
Input/output can be specified bit-wise.
When used as an input port, on-chip pull-up resistor can be used by
software.
Input
SI1
P21
SO1
P22
SCK1
P23
STB
P24
BUSY
P25
SI0/SB0/SDA0
P26
SO0/SB1/SDA1
P27
SCK0/SCL
P30
Input/
output
Port 3
8-bit input/output port.
Input/output can be specified bit-wise.
When used as an input port, on-chip pull-up resistor can be used by
software.
Input
TO0
P31
TO1
P32
TO2
P33
TI1
P34
TI2
P35
PCL
P36
BUZ
P37
—
P40 to P47
Input/
output
Port 4
8-bit input/output port.
Input/output can be specified in 8-bit unit.
When used as an input port, on-chip pull-up resistor can be used by
software. Test input flag (KRIF) is set to 1 by falling edge detection.
Input
AD0 to AD7