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■ P22: The functions of Port 22 are controlled by PFR22
Addr
PFR22
0D96h
PFR22.7
EPFR22
0DD6h
P22[7:0] is input/output for I2C serial communication signals SCL, SDA of channels 0 and 1, CAN serial
communication signals TX, RX of channels 4 and 5, and External Interrupt Triggers INT[15:12]. Otherwise, the
port can be used as general purpose port.
PFR22.7
0 - Port is in general purpose port mode.
1 - Port is in resource function mode:
Resource function is SCL1 open drain
PFR22.6
0 - Port is in general purpose port mode.
1 - Port is in resource function mode:
Resource function is SDA1 open drain, and INT15 input
Remark: This pin supports external interrupt wake up from STOP-HIZ mode. Because of this
the internal input line is not forced to low in STOP-HIZ mode if the PFR is set to '1' and
interrupt is enabled with ENIR1.EN15 set to '1'.
PFR22.5
0 - Port is in general purpose port mode.
1 - Port is in resource function mode:
Resource function is SCL0 open drain
PFR22.4
0 - Port is in general purpose port mode.
1 - Port is in resource function mode:
Resource function is SDA0 open drain, and INT14 input
Remark: This pin supports external interrupt wake up from STOP-HIZ mode. Because of this
the internal input line is not forced to low in STOP-HIZ mode if the PFR is set to '1' and
interrupt is enabled with ENIR1.EN14 set to '1'.
PFR22.3
0 - Port is in general purpose port mode.
1 - Port is in resource function mode:
Resource function is TX5 output
PFR22.2
0 - Port is in general purpose port mode.
1 - Port is in resource function mode:
Resource function is RX5 input, and INT13 input
Remark: This pin supports external interrupt wake up from STOP-HIZ mode. Because of this
the internal input line is not forced to low in STOP-HIZ mode if the PFR is set to '1' and
interrupt is enabled with ENIR1.EN13 set to '1'.
PFR22.1
0 - Port is in general purpose port mode.
1 - Port is in resource function mode:
Resource function is TX4 output
PFR22.0
0 - Port is in general purpose port mode.
1 - Port is in resource function mode:
7
6
5
PFR22.6
PFR22.5
-
-
-
R/W
R/W
R/W
4
3
PFR22.4
PFR22.3
PFR22.2
-
-
R/W
R/W
R/W
Chapter 30 I/O Ports
3.Port Register Settings
2
1
0
PFR22.1
PFR22.0
-
-
-
R/W
R/W
initial
0000 0000
---- ----
481
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