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Section 8 I/O Ports
Rev. 6.00 Sep 12, 2006 page 179 of 526
REJ09B0326-0600
8.3.3 Pin
Functions
Table 8.6 shows the port 2 pin functions.
Table 8.6
Port 2 Pin Functions
Pin
Pin Functions and Selection Method
P2
2
/TXD
The pin function depends on bit TXD in PMR7 and bit PCR2
2
in PCR2.
TXD
0
1
PCR2
2
0
1
*
Pin
function
P2
2
input pin P2
2
output pin
TXD output pin
P2
1
/RXD
The pin function depends on bit RE in SCR3 and bit PCR2
1
in PCR2.
RE
0
1
PCR2
1
0
1
*
Pin
function
P2
1
input pin P2
1
output pin
RXD input pin
P2
0
/SCK
3
The pin function depends on bits CKE1 and CKE0 in SCR3, bit COM in SMR,
and bit PCR2
0
in PCR2.
CKE1
0
1
CKE0
0
1
*
COM
0 1
*
*
PCR2
0
0
1
*
*
Pin
function
P2
0
input pin P2
0
output pin SCK
3
output
pin
SCK
3
input pin
Legend:
*
Don’t care
8.3.4 Pin
States
Table 8.7 shows the port 2 pin states in each operating mode.
Table 8.7
Port 2 Pin States
Pins Reset
Sleep
Subsleep
Standby
Watch
Subactive
Active
P2
2
/TXD
P2
1
/RXD
P2
0
/SCK
3
High-
impedance
Retains
previous
state
Retains
previous
state
High-
impedance
Retains
previous
state
Functional
Functional
Summary of Contents for F-ZTAT H8/3642A Series
Page 6: ...Rev 6 00 Sep 12 2006 page iv of xx ...
Page 8: ...Rev 6 00 Sep 12 2006 page vi of xx ...
Page 22: ...Rev 6 00 Sep 12 2006 page xx of xx ...
Page 124: ...Section 5 Power Down Modes Rev 6 00 Sep 12 2006 page 102 of 526 REJ09B0326 0600 ...
Page 188: ...Section 6 ROM Rev 6 00 Sep 12 2006 page 166 of 526 REJ09B0326 0600 ...
Page 190: ...Section 7 RAM Rev 6 00 Sep 12 2006 page 168 of 526 REJ09B0326 0600 ...
Page 298: ...Section 9 Timers Rev 6 00 Sep 12 2006 page 276 of 526 REJ09B0326 0600 ...
Page 378: ...Section 12 A D Converter Rev 6 00 Sep 12 2006 page 356 of 526 REJ09B0326 0600 ...
Page 446: ...Section 13 Electrical Characteristics Rev 6 00 Sep 12 2006 page 424 of 526 REJ09B0326 0600 ...