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| HD6413007F20 Datasheet, PDF (148/798 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series | |||
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6. Bus Controller
Bit 7â¯Address 23 Enable (A23E): Enables PA4 to be used as the A23 address output pin. Writing
0 in this bit enables A23 output from PA4. In modes 1 and 2, this bit cannot be modified and PA4
has its ordinary port functions.
Bit 7
A23E
0
1
Description
PA is the A address output pin
4
23
PA is an input/output pin
4
(Initial value)
Bit 6â¯Address 22 Enable (A22E): Enables PA5 to be used as the A22 address output pin. Writing
0 in this bit enables A22 output from PA5. In modes 1 and 2, this bit cannot be modified and PA5
has its ordinary port functions.
Bit 6
A22E
0
1
Description
PA5 is the A22 address output pin
PA5 is an input/output pin
(Initial value)
Bit 5â¯Address 21 Enable (A21E): Enables PA6 to be used as the A21 address output pin. Writing
0 in this bit enables A21 output from PA6. In modes 1 and 2, this bit cannot be modified and PA6
has its ordinary port functions.
Bit 5
A21E
0
1
Description
PA6 is the A21 address output pin
PA6 is an input/output pin
(Initial value)
Bit 4â¯Address 20 Enable (A20E): Initial value of this bit varies depending on the mode. This
bit can not be modified.
Bit 4
A20E
0
1
Description
PA is the A address output pin (Initial value in mode 3 or 4)
7
20
PA7 is an input/output pin (Initial value in mode 1 or 2)
Bits 3 to 1â¯Reserved: These bits cannot be modified and are always read as 1.
Rev.5.00 Sep. 12, 2007 Page 118 of 764
REJ09B0396-0500
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