HD6432621 Hitachi, HD6432621 Datasheet - Page 276

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

9.5
9.5.1
Port A is a 6-bit I/O port. Port A pins also function as address bus outputs and SCI2 I/O pins
(SCK2, RxD2, and TxD2). The pin functions change according to the operating mode.
Port A has a built-in MOS input pull-up function that can be controlled by software.
Figure 9-4 shows the port A pin configuration.
232
Note: * In the H8S/2626 Series, PA5 and PA4 are OSC2 and OSC1, respectively.
Port A
Overview
Port A
Port A pins
PA5 *
PA4 *
PA3/A19/SCK2
PA2/A18/RxD2
PA1/A17/TxD2
PA0/A16
Figure 9-4 Port A Pin Functions
Pin functions in modes 4 to 6
PA5 (I/O)
PA4 (I/O)
PA3 (I/O) / A19 (output) / SCK2 (I/O)
PA2 (I/O) / A18 (output) / RxD2 (input)
PA1 (I/O) / A17 (output) / TxD2 (output)
PA0 (I/O) / A16 (output)
Pin functions in mode 7
PA5 (I/O)
PA4 (I/O)
PA3 (I/O) / SCK2 (output)
PA2 (I/O) / RxD2 (input)
PA1 (I/O) / TxD2 (output)
PA0 (I/O)