HD64F3670 Datasheet, PDF (116/305 Pages) Renesas Technology Corp – Hitachi Single-Chip Microcomputer

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 R/W Description
7 PUCR17 0
6 PUCR16 0
5 PUCR15 0
4 PUCR14 0
3−
1
R/W Only bits for which PCR1 is cleared are valid. The pull-up
R/W ^{MOS of P17 to P14 and P12 to P10 pins enter the on-}
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.
2 PUCR12 0
R/W
1 PUCR11 0
R/W
0 PUCR10 0
R/W
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.
PCR1
PCR17
0
1
X
Pin Function
P17 input pin
P17 output pin
IRQ3 input/TRGV input pin
P16 pin
Register
Bit Name
Setting value
PCR1
PCR16
0
1
Pin Function
P16 input pin
P16 output pin
Rev. 1.0, 03/01, page 92 of 280