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| HD6413002 Datasheet, PDF (126/700 Pages) Renesas Technology Corp – High-performance single-chip microcontroller | |||
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Bit 6âAddress 22 Enable (A22E): Enables PA5 to be used as the A22 address output pin.
Writing 0 in this bit enables A22 address output from PA5. In modes other than 3 and 4 this bit
cannot be modified and PA5 has its ordinary input/output functions.
Bit 6
A22E
0
1
Description
PA5 is the A22 address output pin
PA5 is the PA5/TP5/TIOCB1 input/output pin
(Initial value)
Bit 5âAddress 21 Enable (A21E): Enables PA6 to be used as the A21 address output pin.
Writing 0 in this bit enables A21 address output from PA6. In modes other than 3 and 4 this bit
cannot be modified and PA6 has its ordinary input/output functions.
Bit 5
A21E
0
1
Description
PA6 is the A21 address output pin
PA6 is the PA6/TP6/TIOCA2 input/output pin
(Initial value)
Bits 4 to 1âReserved: These bits cannot be modified and are always read as 1.
Bit 0âBus Release Enable (BRLE): Enables or disables release of the bus to an external device.
Bit 0
BRLE
0
1
Description
The bus cannot be released to an external device; BREQ and BACK
can be used as input/output pins
The bus can be released to an external device
(Initial value)
111
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