Pin Functions; Port A; Overview - Renesas H8S/2319 series Hardware Manual

8.5.3

Pin Functions

Port 4 pins also function as A/D converter analog input pins (AN0 to AN7) and D/A converter
analog output pins (DA0 and DA1).
8.6

Port A

8.6.1

Overview

Port A is a 4-bit I/O port. Port A pins also function as address bus outputs. 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 8-5 shows the port A pin configuration.
Port A
Pin functions in mode 6 *
PA3 (input)/A19 (output)
PA2 (input)/A18 (output)
PA1 (input)/A17 (output)
PA0 (input)/A16 (output)
Note: * Modes 6 and 7 are not available in the ROMless versions.
Rev. 5.00, 12/03, page 248 of 1088
Port A pins
PA3/ A19
PA2/ A18
PA1/ A17
PA0/ A16
Figure 8-5 Port A Pin Functions
Pin functions in modes 4 and 5
A19 (output)
A18 (output)
A17 (output)
A16 (output)
Pin functions in mode 7 *
PA3 (I/O)
PA2 (I/O)
PA1 (I/O)
PA0 (I/O)