5-2
MSM66573 Family User's Manual
Chapter 5 Port Functions
Table 5-1 Port Function Summary
Port name
Pin
Type Number
I/O
Secondary function
Port 0*
P0_0 to P0_7
A
8
I/O
External memory access D0 to D7 (I/O)
Port 1
P1_0 to P1_7
B
8
I/O
External memory access A8 to A15 (output)
Port 2
P2_0 to P2_3
B
4
I/O
External memory access A16 to A19 (output)
Port 3*
P3_1
B
1
I/O
External program memory access PSEN (output)
P3_2
C
1
I/O
External data memory access RD (output)
P3_3
C
1
I/O
External data memory access WR (output)
Port 4
P4_0 to P4_7
B
8
I/O
External memory access A0 to A7 (output)
Port 5
P5_4, P5_5
D
2
I/O
Capture/compare CPCM0, CPCM1 (I/O)
P5_6
D
1
I/O
Timer 0 timer output TM0OUT (output)
P5_7
D
1
I/O
Timer 0 external event input TM0EVT (input)
Port 6
P6_0 to P6_3
D
4
I/O
External interrupt EXINT0 to EXINT3 (input)
P6_4 to P6_7
E
4
I/O
None
Port 7
P7_0
D
1
I/O
SIO0 receive data input RXD0 (input)
P7_1
D
1
I/O
SIO0 transmit data output TXD0 (output)
P7_2
D
1
I/O
SIO0 external clock RXC0 (input)
P7_4
D
1
I/O
Timer 3 timer output TM3OUT (output)
P7_5
D
1
I/O
Timer 3 external event input TM3EVT (input)
P7_6, P7_7
D
2
I/O
PWM output PWM0OUT, PWM1OUT (output)
Port 8
P8_0
D
1
I/O
SIO1 receive data input RXD1 (input)
P8_1
D
1
I/O
SIO1 transmit data output TXD1 (output)
P8_2
D
1
I/O
SIO1 receive clock RXC1 (I/O)
P8_3
D
1
I/O
SIO1 transmit clock TXC1 (I/O)
P8_4
D
1
I/O
Timer 4 timer output TM4OUT (output)
P8_6, P8_7
D
2
I/O
PWM output PWM2OUT, PWM3OUT (output)
Port 9
P9_0, P9_1
D
2
I/O
External interrupt EXINT4, EXINT5 (input)
P9_2, P9_3
E
2
I/O
None
P9_7
D
1
I/O
HOLD mode transfer output HLDACK (output)
Port 10
P10_0
D
1
I/O
SIO3 transmit-receive clock SIOCK3 (I/O)
P10_1
D
1
I/O
SIO3 receive data input SIOI3 (input)
P10_2
D
1
I/O
SIO3 transmit data output SIOO3 (output)
P10_3 to P10_5
E
3
I/O
None
P10_7
D
1
I/O
Timer 5 external event input TM5EVT (input)
Port 11*
P11_0
D
1
I/O
External data memory access WAIT (input)
P11_1
D
1
I/O
HOLD mode request input HOLD (input)
P11_2
D
1
I/O
Main clock pulse output CLKOUT (output)
P11_3
D
1
I/O
Subclock pulse output XTOUT (output)
P11_6
D
1
I/O
Timer 9 timer output TM9OUT (output)
P11_7
D
1
I/O
Timer 9 external event input TM9EVT (input)
Port 12
P12_0 to P12_7
F
8
I
A/D converter analog input AI0 to AI7 (input)
*Ports marked with an asterisk are capable of driving LEDs.