HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 294

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 8 I/O Ports
8.8.4
Port B has a built-in MOS input pull-up function that can be controlled by software. This MOS
input pull-up function can be used in modes 2, 3, 6, and 7, and can be specified as on or off on an
individual bit basis.
When a PBDDR bit is cleared to 0 in mode 2, 3, 6, or 7, setting the corresponding PBPCR bit to 1
turns on the MOS input pull-up for that pin.
The MOS input pull-up function is in the off state after a power-on reset, and in hardware standby
mode. The prior state is retained after a manual reset, and in software standby mode.
Note: Modes 2, 3, 6, and 7 cannot be used in the H8S/2240.
Table 8.14 summarizes the MOS input pull-up states.
Table 8.14 MOS Input Pull-Up States (Port B)
Modes
1, 4, 5
2, 3, 6, 7
Legend:
OFF:
ON/OFF: On when PBDDR = 0 and PBPCR = 1; otherwise off.
Rev.3.00 Mar. 26, 2007 Page 252 of 772
REJ09B0355-0300
MOS Input Pull-Up Function
MOS input pull-up is always off.
Power-On
Reset
OFF
Figure 8.13 Port B Pin Functions (Modes 3 and 7)
Hardware
Standby Mode
OFF
Port B
PB
PB
PB
PB
PB
PB
PB
PB
Manual
Reset
OFF
ON/OFF
7
6
5
4
3
2
1
0
(I/O)
(I/O)
(I/O)
(I/O)
(I/O)
(I/O)
(I/O)
(I/O)
Software
Standby Mode
OFF
ON/OFF
In Other
Operations
OFF
ON/OFF