HD6432633 Datasheet, PDF (446/1453 Pages) Renesas Technology Corp – Series of Microcomputers (MCUs: microcomputer units)

10A.5.3 Pin Functions
The pins of port 7 are multipurpose pins which function as 8-bit timer I/O pins, (TMRI01,
TMCI01, TMRI23, TMCI23, TMO0, TMO1, TMO2, and TMO3), DMAC I/O pins (DREQ0,
TEND0, DREQ1, and TEND1), bus control output pins (CS4 to CS7), IIC input pin (SYNCI), SCI
I/O pins (SCK3, RxD3, and TxD3) and manual reset input pin (MRES). Table 10A-8 shows the
functions of port 7 pins.
Table 10A-8 Port 7 Pin Functions
Pin
P77/TxD3
Selection Method and Pin Functions
Switches as follows according to combinations of SCR TE bit of SCI3, and the
P77DDR bit.
TE
0
1
P77DDR
0
1
—
Pin function P77 input pin P77 output pin
TxD3 output pin
P76/RxD3
Switches as follows according to combinations of SCR RE bit of SCI3 and the
P76DDR bit.
RE
0
1
P76DDR
0
1
—
Pin function P76 input pin P76 output pin
RxD3 I/O pin
P75/TMO3/
SCK3
Switches as follows according to combinations of SMR C/A bit of SCI3, SCR CKE0
and CKE1 bits, TCSR3 OS3 to OS0 bits of the 8-bit timer, and the P75DDR bit.
OS3 to OS0
All 0
Any is 1
CKE1
0
1
—
C/A
0
1
—
—
CKE0
0
1
—
—
—
P75DDR
0
1
—
—
—
—
Pin function
P75
P75
SCK3 SCK3 SCK3 TMO3
input pin output pin output pin output pin input pin output
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