HD6412340 HITACHI [Hitachi Semiconductor], HD6412340 Datasheet - Page 263

• Manufacturer Part Number: HD6412340
• Description: H8S/2345 F-ZTAT Hardware Manual
• Manufacturer: HITACHI [Hitachi Semiconductor]

Port B MOS Pull-Up Control Register (PBPCR)
PBPCR is an 8-bit readable/writable register that controls the MOS input pull-up function
incorporated into port B on an individual bit basis.
When a PBDDR bit is cleared to 0 (input port setting) in mode 2, 3, 6, or 7*, setting the
corresponding PBPCR bit to 1 turns on the MOS input pull-up for the corresponding pin.
PBPCR is initialized to H'00 by a power-on reset, and in hardware standby mode. It retains its
prior state after a manual reset, and in software standby mode.
Note: * Modes 1 to 3 are not available on the F-ZTAT version.
8.7.3
Modes 1, 4, and 5*: In modes 1, 4, and 5*, port B pins are automatically designated as address
outputs.
Port B pin functions in modes 1, 4, and 5 are shown in figure 8.10.
Note: * Modes 1 to 3 are not available on the F-ZTAT version.
246
Bit
Initial value
R/W
Modes 2, 3, 6, and 7 are not available on the ROMless version.
Modes 2, 3, 6, and 7 are not available on the ROMless version.
Pin Functions
:
:
:
PB7PCR
R/W
Figure 8.10 Port B Pin Functions (Modes 1, 4, and 5)*
7
0
PB6PCR
R/W
6
0
PB5PCR
Port B
R/W
5
0
PB4PCR
R/W
4
0
A
A
A
A
A
A
A
A
15
14
13
12
11
10
9
8
(output)
(output)
(output)
(output)
(output)
(output)
(output)
(output)
PB3PCR
R/W
3
0
PB2PCR
R/W
2
0
PB1PCR
R/W
1
0
PB0PCR
R/W
0
0