HD6412350 Hitachi, HD6412350 Datasheet - Page 381

• Manufacturer Part Number: HD6412350
• Description: (HD6412350 / HD6432351) 16-BIT MICROCONTROLLER
• Manufacturer: Hitachi

Modes 4 and 5: In modes 4 and 5, the lower 5 bits of port A are designated as address outputs
automatically, while the upper 3 bits function as address outputs or input ports and interrupt input
pins. Input or output can be specified individually for the upper 3 bits. Setting one of bits
PA7DDR to PA5DDR to 1 makes the corresponding port A pin an address output, while clearing
the bit to 0 makes the pin an input port.
Port A pin functions in modes 4 and 5 are shown in figure 9-9.
Mode 6 [H8S/2351 Only]: In mode 6, port A pins function as address outputs or input ports and
interrupt input pins. Input or output can be specified on an individual bit basis. Setting a PADDR
bit to 1 makes the corresponding port A pin an address output, while clearing the bit to 0 makes
the pin an input port.
Port A pin functions in mode 6 are shown in figure 9-10.
Port A
Port A
Figure 9-9 Port A Pin Functions (Modes 4 and 5)
Figure 9-10 Port A Pin Functions (Mode 6)
When PADDR = 1
A
A
A
A
A
A
A
A
When PADDR = 1
A
A
A
A
A
A
A
A
23
22
21
20
19
18
17
16
23
22
21
20
19
18
17
16
(output)
(output)
(output)
(output)
(output)
(output)
(output)
(output)
(output)
(output)
(output)
(output)
(output)
(output)
(output)
(output)
When PADDR = 0
PA
PA
PA
PA
PA
PA
PA
PA
When PADDR = 0
PA
PA
PA
A
A
A
A
A
20
19
18
17
16
7
6
5
4
3
2
1
0
7
6
5
(output)
(output)
(output)
(output)
(output)
(input)/IRQ7 (input)
(input)/IRQ6 (input)
(input)/IRQ5 (input)
(input)/IRQ4 (input)
(input)
(input)
(input)
(input)
(input)/IRQ7 (input)
(input)/IRQ6 (input)
(input)/IRQ5 (input)
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