PEDL66577-01
Semiconductor
1
MSM66577 Family
PIN DESCRIPTIONS
In the Type column, “I” indicates an input pin, “O” indicates an output pin, and “I/O” indicates an I/O pin.
Description
Function
Port
Symbol
Type
P0_0/D0 (AD0)
to
P0_7/D7 (AD7)
P1_0/A8
to
P1_7/A15
P2_0/A16
to
P2_3/A19
P3_0/ALE
I/O
Primary function
8-bit I/O port
10 mA sink capability
Pull-up resistors can be
specified for each individual bit
8-bit I/O port
Pull-up resistors can be
specified for each individual bit
Type
Secondary function
External memory access
Data I/O port
(Address output/data I/O port when
selecting a multiplexed bus)
I/O
I/O
External memory access
O
Address output port
I/O
4-bit I/O port
Pull-up resistors can be
specified for each individual bit
4-bit I/O port
10 mA sink capability
Pull-up resistors can be
specified for each individual bit
O
External memory access
Address output port
External memory access
Address latch enable signal
output pin
External program memory
access
Read strobe output pin
External memory access
Read strobe output pin
External memory access
Write strobe output pin
External memory access
Address output port
(When selecting a separate bus
type)
Capture 0 input / Compare
0 output pin
Capture 1 input / Compare
1 output pin
Timer 0 timer output pin
Timer 0 external event input pin
External interrupt 0 input pin
External interrupt 1 input pin
External interrupt 2 input pin
External interrupt 3 input pin
Timer1 external event input pin
Timer 1 timer output pin
Timer 2 external event pin
Timer 2 timer output pin
O
P3_1/PSEN
I/O
P3_2/RD
P3_3/WR
P4_0/A0
to
P4_7/A7
P5_4/CPCM0
P5_5/CPCM1
P5_6/TM0OUT
P5_7/TM0EVT
O
O
O
8-bit I/O port
Pull-up resistors can be
specified for each individual bit
4-bit I/O port
Pull-up resistors can be
specified for each individual bit
I/O
O
I/O
I/O
O
I
I/O
P6_0/EXINT0
P6_1/EXINT1
P6_2/EXINT2
P6_3/EXINT3
P6_4/TM1EVT
P6_5/TM1OUT
P6_6/TM2EVT
P6_7/TM2OUT
I/O
8-bit I/O port
Pull-up resistors can be
specified for each individual bit
I
I
I
I
I
O
I
O
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OKI [ OKI ELECTRONIC COMPONETS ]
