Table of Contents
9.1.4
Port Pull-Up Control Register 1(PUCR1)
PUCR1 controls the pull-up MOS in bit units of the pins set as the input ports.
Bit Bit Name
Initial Value
7
PUCR17
0
6
PUCR16
0
5
PUCR15
0
4
PUCR14
0
−
3
1
2
PUCR12
0
1
PUCR11
0
0
PUCR10
0
9.1.5
Pin Functions
The correspondence between the register specification and the port functions is shown below.
P17/IRQ3/TRGV pin
Register
PMR1
Bit Name
IRQ3
Setting value 0
0
1
Legend X: Don't care.
P16 pin
Register
PCR1
Bit Name
PCR16
Setting value
0
1
Rev. 1.0, 03/01, page 92 of 280
R/W
Description
R/W
Only bits for which PCR1 is cleared are valid. The pull-up
MOS of P17 to P14 and P12 to P10 pins enter the on-
R/W
state when these bits are set to 1, while they enter the off-
R/W
state when these bits are cleared to 0.
R/W
Bit 3 is a reserved bit. This bit is always read as 1 and
−
cannot be modified.
R/W
R/W
R/W
PCR1
PCR17
Pin Function
0
P17 input pin
1
P17 output pin
IRQ3 input/TRGV input pin
X
Pin Function
P16 input pin
P16 output pin
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