HD6433640 HITACHI [Hitachi Semiconductor], HD6433640 Datasheet - Page 189

• Manufacturer Part Number: HD6433640
• Description: H8/3644 Series Hardware Manual
• Manufacturer: HITACHI [Hitachi Semiconductor]

8.3.3
Table 8.6 shows the port 2 pin functions.
Table 8.6
Pin
P2
P2
P2
Note: * Don’t care
8.3.4
Table 8.7 shows the port 2 pin states in each operating mode.
Table 8.7
Pins
P2
P2
P2
2
1
0
2
1
0
/TXD
/RXD
/SCK
/TXD
/RXD
/SCK
3
3
Pin Functions
Pin States
Port 2 Pin Functions
Port 2 Pin States
Reset
High-
impedance
Pin Functions and Selection Method
The pin function depends on bit TXD in PMR7 and bit PCR2
TXD
PCR2
Pin function
The pin function depends on bit RE in SCR3 and bit PCR2
RE
PCR2
Pin function
The pin function depends on bits CKE1 and CKE0 in SCR3, bit COM in SMR,
and bit PCR2
CKE1
CKE0
COM
PCR2
Pin function
2
1
0
Sleep
Retains
previous
state
0
in PCR2.
P2
P2
P2
Subsleep
Retains
previous
state
2
1
0
input pin
input pin
input pin
0
0
0
0
0
0
Standby
High-
impedance
P2
P2
P2
0
2
1
0
output pin
output pin
output pin SCK
0
1
1
1
Watch
Retains
previous
state
1
3
pin
*
Subactive Active
Functional Functional
output
TXD output pin
RXD input pin
1
in PCR2.
2
1
*
in PCR2.
1
*
1
*
SCK
3
input pin
1
*
*
*
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