HD6412340 HITACHI [Hitachi Semiconductor], HD6412340 Datasheet - Page 254

• Manufacturer Part Number: HD6412340
• Description: H8S/2345 F-ZTAT Hardware Manual
• Manufacturer: HITACHI [Hitachi Semiconductor]

8.6
8.6.1
Port A is an 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
Overview
Pin functions in modes 4 and 5
A
A
A
A
Note: * Modes 1 to 3 are not available on the F-ZTAT version.
1 9
1 8
1 7
1 6
Port A
(output)
(output)
(output)
(output)
Modes 2, 3, 6, and 7 are not available on the ROMless version.
Port A pins
PA
PA
PA
PA
3
2
1
0
Figure 8.5 Port A Pin Functions
/ A
/ A
/ A
/ A
19
18
17
16
Pin functions in modes 1, 2, 3, and 7 *
PA
PA
PA
PA
Pin functions in mode 6 *
PA
PA
PA
PA
3
2
1
0
3
2
1
0
(input)/
(input)/
(input)/
(input)/
(I/O)
(I/O)
(I/O)
(I/O)
A
A
A
A
19
18
17
16
(output)
(output)
(output)
(output)
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