Datasheet

Section 9 I/O Ports
Rev. 2.00 Jul. 04, 2007 Page 203 of 692
REJ09B0309-0200
9.13.2 Port Control Register F (PCRF)
PCRF selects inputs/outputs in bit units for pins of
port F.
Bit Bit Name
Initial
Value
R/W Description
7 to 5  All 1  Reserved
These bits are always read as 1 and cannot be
modified.
4    Reserved
The write value should always be 0.
3
2
1
0
PCRF3
PCRF2
PCRF1
PCRF0
0
0
0
0
W
W
W
W
Setting a PCRF bit to 1 makes the corresponding pin an
output pin, while clearing the bit to 0 makes the pin an
input pin. The settings in PCRF and in PDRF are valid
when the corresponding pin is designated as a general
I/O pin.
PCRF is a write-only register. These bits are always
read as 1.
9.13.3 Port Mode Register F (PMRF)
PMRF controls the selection of the pin functions on port F.
Bit Bit Name
Initial
Value
R/W Description
7 to 3  All 1  Reserved
These bits are always read as 1 and cannot be
modified.
2 IRQ4 0 R/W PF1/IRQ4 Pin Function Switch
0: PF1 I/O pin
1: IRQ4 input pin
1 NCS 0 R/W Controls usage of the TMIG noise cancellation circuit.
0: Noise cancellation is disabled
1: Noise cancellation is enabled
0 TMIG 0 R/W PF0/TMIG Pin Function Switch
0: PF0 I/O pin
1: TMIG input pin