Advertisement
10.5
Port 7
10.5.1
Overview
Port 7 is an 8-bit I/O port. Port 7 is a multipurpose port for the 8-bit timer I/O pins (TMRI01,
TMCI01, TMRI23, TMCI23, TMO0, TMO1, TMO2, TMO3), DMAC I/O pins (DREQ0, TEND0,
DREQ1, TEND1), bus control output pins (CS4 to CS7), IIC input pin (SYNCI), SCI I/O pins
(SCK3, RxD3, TxD3) and manual reset input pin (MRES). The pin functions for P77 to P74 are
the same in all operating modes. P73 to P70 pin functions are switched according to operating
mode.
Figure 10-4 shows the configuration for port 7 pins.
Port 6 pins
P77 /
TxD3
P76 /
RxD3
P75 /
TMO3 SCK3
TMO2 / MRES
Port 7
P74 /
TMO1 / TEND1 / CS7
P73 /
TMO0 / TEND0 / CS6 / SYNCI
P72 /
TMRI23 / TMCI23 / DREQ1 / CS5
P71 /
TMRI01 / TMCI01 / DREQ0 / CS4
P70 /
Pins Functions for Modes 4 to 6
P77 /
(input / output) /
P76 /
(input / output) /
P75 /
(input / output) /
P74 /
(input / output) /
P73 /
(input / output) /
P72 /
(input / output) /
P71 /
(input / output) /
P70 /
(input / output) /
Modes 7 Pin Functions
P77 /
(input / output) /
P76 /
(input / output) /
P75 /
(input / output) /
P74 /
(input / output) /
P73 /
(input / output) /
P72 /
(input / output) /
P71 /
(input / output) /
P70 /
(input / output) /
Figure 10-4 Port 6 Pin Functions
TxD3 (output)
RxD3 (input)
TMO3 (output) / SCK3 (input / output)
TMO2 (output) / MRES (input)
TMO1 (output) / TEND1 (output) / CS7 (output)
TMO0 (output) / TEND0 (output) / CS6 (output) / SYNCI (input)
TMRI23 (input) / TMCI23 (input) / DREQ1 (input) / CS5 (output)
TMRI01 (input) / TMCI01 (input) / DREQ0 (input) / CS4 (output)
TxD3 (output)
RxD3 (input)
TMO3 (output) / SCK3 (input / output)
TMO2 (output) / MRES (input)
TMO1 (output) / TEND1 (output)
TMO0 (output) / TEND0 (output) / SYNCI (input)
TMRI23 (input) / TMCI23 (input) / DREQ1 (input)
TMRI01 (input) / TMCI01 (input) / DREQ0 (input)
355
Advertisement
