HD64F3670 RENESAS [Renesas Technology Corp], HD64F3670 Datasheet - Page 125

• Manufacturer Part Number: HD64F3670
• Description: Hitachi Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

9.3.4
PUCR5 controls the pull-up MOS in bit units of the pins set as the input ports.
Bit Bit Name
7
6
5
4
3
2
1
0
9.3.5
The correspondence between the register specification and the port functions is shown below.
P57 pin
Register
Bit Name
Setting Value X
Legend X: Don't care.
P56 pin
Register
Bit Name
Setting Value X
Legend X: Don't care.
PUCR55
PUCR54
PUCR53
PUCR52
PUCR51
PUCR50
Port Pull-Up Control Register 5 (PUCR5)
Pin Functions
PMR5
POF7
0
1
PMR5
POF6
0
1
Initial Value R/W
0
0
0
0
0
0
0
0
PCR5
PCR5
PCR57
0
1
1
PCR56
0
1
1
R/W
R/W
R/W
R/W
R/W
R/W
Description
Reserved
These bits are always read as 0.
Only bits for which PCR5 is cleared are valid. The pull-up
MOS of the corresponding pins enter the on-state when
these bits are set to 1, while they enter the off-state when
these bits are cleared to 0.
P57 input pin
CMOS output
NMOS open-drain output
P56 input pin
CMOS output
NMOS open-drain output
Pin Function
Pin Function
Rev. 2.0, 03/02, page 101 of 298