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FUJITSU MB91460 SERIES FR60 User Manual

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Chapter 30 I/O Ports

3.Port Register Settings

P22: The functions of Port 22 are controlled by PFR22

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:

Addr

7

6

5

4

3

2

1

0

initial

PFR22

0D96h

PFR22.7

PFR22.6

PFR22.5

PFR22.4

PFR22.3

PFR22.2

PFR22.1

PFR22.0

0000 0000

EPFR22

0DD6h

-

-

-

-

-

-

-

-

---- ----

R/W

R/W

R/W

R/W

R/W

R/W

R/W

R/W