HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 274

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 8 I/O Ports
8.4.3
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
Pin
P3
P3
Rev.3.00 Mar. 26, 2007 Page 232 of 772
REJ09B0355-0300
5
4
/SCK1/IRQ5
/SCK0/IRQ4
Pin Functions
Port 3 Pin Functions
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.
Notes: 1. When P35ODR = 1, the pin becomes on NMOS open-drain output.
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.
Notes: 1. When P34ODR = 1, the pin becomes an NMOS open-drain output.
CKE1
C/A
CKE0
P35DDR
Pin function
CKE1
C/A
CKE0
P34DDR
Pin function
2. When this pin is used as an external interrupt input, it should not be
2. When this pin is used as an external interrupt input, it should not be
used as an input/output pin with other functions.
used as an input/output pin with other functions.
input pin
input pin
P3
P3
0
0
5
4
0
0
output pin*
output pin*
P3
P3
0
1
0
1
IRQ5 interrupt input pin*
IRQ4 interrupt input pin*
5
4
1
1
0
0
output pin*
output pin*
SCK1
SCK0
—
—
1
1
1
1
output pin*
output pin*
SCK1
SCK0
—
—
—
—
2
1
2
1
1
1
input pin
input pin
SCK1
SCK0
—
—
—
—
—
—
1
1