HD6432621 Hitachi, HD6432621 Datasheet - Page 121

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

setting. When a pin is disabled for address output, it becomes an output port when the
corresponding DDR bit is set to 1.
Bit 3
AE3
0
1
Note: * In expanded mode with ROM, bits AE3 to AE0 are initialized to B'0000.
In ROMless expanded mode, bits AE3 to AE0 are initialized to B'1101.
Address pins A0 to A7 are made address outputs by setting the corresponding DDR bits to
1.
Bit 2
AE2
0
1
0
1
Bit 1
AE1
0
1
0
1
0
1
0
1
Bit 0
AE0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Description
A8–A23 address output disabled
A8 address output enabled; A9–A23 address output disabled
A8, A9 address output enabled; A10–A23 address output
disabled
A8–A10 address output enabled; A11–A23 address output
disabled
A8–A11 address output enabled; A12–A23 address output
disabled
A8–A12 address output enabled; A13–A23 address output
disabled
A8–A13 address output enabled; A14–A23 address output
disabled
A8–A14 address output enabled; A15–A23 address output
disabled
A8–A15 address output enabled; A16–A23 address output
disabled
A8–A16 address output enabled; A17–A23 address output
disabled
A8–A17 address output enabled; A18–A23 address output
disabled
A8–A18 address output enabled; A19–A23 address output
disabled
A8–A19 address output enabled; A20–A23 address output
disabled
A8–A20 address output enabled; A21–A23 address output
disabled
A8–A21 address output enabled; A22, A23 address output
disabled
A8–A23 address output enabled
(Initial value*)
(Initial value*)
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