Hitachi HD6473867 Hardware Manual page 176

8.9.3 Pin Functions
Table 8-24 shows the port A pin functions.
Table 8-24 Port A Pin Functions
Pin Pin Functions and Selection Method
PA /COM The pin function depends on bit PCRA
3 4
SEGS3 to SEGS0
PA /COM The pin function depends on bit PCRA
2 3
SEGS3 to SEGS0
PA /COM The pin function depends on bit PCRA
1 2
SEGS3 to SEGS0
PA /COM The pin function depends on bit PCRA
0 1
SEGS3 to SEGS0
8.9.4 Pin States
Table 8-25 shows the port A pin states in each operating mode.
Table 8-25 Port A Pin States
Pins Reset
PA /COM High-
3 4
PA /COM impedance previous
2 3
PA /COM
1 2
PA /COM
0 1
PCRA
3
Pin function PA
PCRA
2
Pin function PA
PCRA
1
Pin function PA
PCRA
0
Pin function PA
0
Sleep Subsleep Standby
Retains Retains
previous
state state
in PCRA and bits SGS3 to SGS0.
3
0000
0
input pin PA
3
in PCRA and bits SGS3 to SGS0.
2
0000
0
input pin PA
2
in PCRA and bits SGS3 to SGS0.
1
0000
0
input pin PA
1
in PCRA and bits SGS3 to SGS0.
0
0000
0 1
input pin PA output pin
0
High-
impedance
168
0000
1
output pin COM
3
0000
1
output pin COM
2
0000
1
output pin COM
1
Not 0000
*
COM output pin
1
Watch Subactive
Retains Functional
previous
state
Not 0000
*
output pin
4
Not 0000
*
output pin
3
Not 0000
*
output pin
2
*: Don't care
Active
Functional