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Section 8 I/O Ports
Table 8.11 Port 6 Pin Functions in Modes 1 to 5
Pin
P6
/φ
7
LWR
HWR
RD
AS
P6
/BACK
2
P6
/BREQ
1
P6
/WAIT
0
Rev. 4.00 Jan 26, 2006 page 292 of 938
REJ09B0276-0400
Pin Functions and Selection Method
Bit PSTOP in MSTCRH selects the pin function.
PSTOP
Pin function
Functions as LWR regardless of the setting of bit P6
P6
DDR
6
Pin function
If any of bits DRAS2 to DRAS0 in DRCRA is 1 and bit CSEL in DRCRB is 1, LWR
Note: *
output functions as LCAS.
Functions as HWR regardless of the setting of bit P6
P6
DDR
5
Pin function
If any of bits DRAS2 to DRAS0 in DRCRA is 1 and bit CSEL in DRCRB is 1, HWR
Note: *
output functions as UCAS.
Functions as RD regardless of the setting of bit P6
P6
DDR
4
Pin function
If any of bits DRAS2 to DRAS0 in DRCRA is 1, RD output functions as WE.
Note: *
Functions as AS regardless of the setting of bit P6
P6
DDR
3
Pin function
Bit BRLE in BRCR and bit P6
BRLE
P6
DDR
2
Pin function
Bit BRLE in BRCR and bit P6
BRLE
P6
DDR
1
Pin function
Bit WAITE in BCR and bit P6
WAITE
P6
DDR
0
Pin function
Note: *
Do not set bit P6
DDR to 1.
0
0
φ output
DDR
6
0
LWR output*
DDR
5
0
HWR output*
DDR
4
0
RD output*
DDR
3
0
AS output
DDR select the pin function as follows
2
0
0
1
P6
input
P6
output
2
2
DDR select the pin function as follows
1
0
0
1
P6
input
P6
output
1
1
DDR select the pin function as follows.
0
0
0
1
P6
input
P6
output
0
0
1
P6
input
7
1
1
1
1
1
—
BACK output
1
—
BREQ input
1
0*
WAIT input
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