HD6432621 Hitachi, HD6432621 Datasheet - Page 297

• Manufacturer Part Number: HD6432621
• Description: (HD64F262x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

9.7
9.7.1
Port C is an 8-bit I/O port. Port C has an address bus output function, SCI I/O pins (TxD0, RxD0,
SCK0, TxD1, RxD1 and SCK1), and external interrupt input pins (IRQ4 and IRQ5), and the pin
functions change according to the operating mode.
Port C has a built-in MOS input pull-up function that can be controlled by software.
Figure 9-6 shows the port C pin configuration.
Pin functions in mode 6
PC7
PC6
PC5
PC4
PC3
PC2
PC1
PC0
Port C
Overview
Port C
(input) /
(input) /
(input) /
(input) /
(input) /
(input) /
(input) /
(input) /
A7
A6
A5
A4
A3
A2
A1
A0
(output)
(output)
(output) / SCK1 (I/O) / IRQ5 (input)
(output) / RxD1 (input)
(output) / TxD1 (output)
(output) / SCK0 (I/O) / IRQ4 (input)
(output) / RxD0 (input)
(output) / TxD0 (output)
Port C pins
PC7/A7
PC6/A6
PC5/A5/SCK1/IRQ5
PC4/A4/RxD1
PC3/A3/TxD1
PC2/A2/SCK0/IRQ4
PC1/A1/RxD0
PC0/A0/TxD0
Figure 9-6 Port C Pin Functions
Pin functions in modes 4 and 5
A7
A6
A5
A4
A3
A2
A1
A0
Pin functions in mode 7
PC7
PC6
PC5
PC4
PC3
PC2
PC1
PC0
(output)
(output)
(output)
(output)
(output)
(output)
(output)
(output)
(I/O)
(I/O)
(I/O) / SCK1 (I/O) / IRQ5 (input)
(I/O) / RxD1 (input)
(I/O) / TxD1 (output)
(I/O) / SCK0 (I/O) / IRQ4 (input)
(I/O) / RxD0 (input)
(I/O) / TxD0 (output)
253