D12320VF25V Datasheet, PDF (283/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 8 I/O Ports
8.4.3 Pin Functions
Port 3 pins also function as SCI I/O pins (TxD0, RxD0, SCK0, TxD1, RxD1, and SCK1) and
interrupt input pins (IRQ4, IRQ5). Port 3 pin functions are shown in table 8.7.
Table 8.7 Port 3 Pin Functions
Pin
P35/SCK1/IRQ5
Selection Method and Pin Functions
The pin function is switched as shown below according to the combination of
bit C/A in the SCI1 SMR, bits CKE0 and CKE1 in SCR, and bit P35DDR.
CKE1
C/A
0
0
1
1
—
CKE0
0
1
—
—
P35DDR
0
1
—
—
—
Pin function
P35
P35
SCK1
SCK1
SCK1
input pin output pin^*1 output pin^*1 output pin^*1 input pin
IRQ5 interrupt input pin^*2
Notes: 1. When P35ODR = 1, the pin becomes an NMOS open-drain output.
2. When this pin is used as an external interrupt input, it should not be
used as an input/output pin with other functions.
P34/SCK0/IRQ4
The pin function is switched as shown below according to the combination of
bit C/A in the SCI0 SMR, bits CKE0 and CKE1 in SCR, and bit P34DDR.
CKE1
0
1
C/A
0
1
—
CKE0
0
1
—
—
P34DDR
0
1
—
—
—
Pin function
P34
P34
SCK0
SCK0
SCK0
input pin output pin^*1 output pin^*1 output pin^*1 input pin
IRQ4 interrupt input pin^*2
Notes: 1. When P34ODR = 1, the pin becomes an NMOS open-drain output.
2. When this pin is used as an external interrupt input, it should not be
used as an input/output pin with other functions.
Rev.7.00 Feb. 14, 2007 page 249 of 1108
REJ09B0089-0700