Renesas H8S/2111B 用户手册
Rev. 1.00, 05/04, page 102 of 544
7.1.5
Port 1 Input Pull-Up MOS
Port 1 has an on-chip input pull-up MOS function that can be controlled by software. This input
pull-up MOS function can be specified as on or off on a bit-by-bit basis.
pull-up MOS function can be specified as on or off on a bit-by-bit basis.
Table 7.2 summarizes the input pull-up MOS states.
Table 7.2
Input Pull-Up MOS States (Port 1)
Reset
Hardware Standby Mode
Software Standby Mode In Other Operations
Off Off
On/Off
On/Off
[Legend]
Off:
Off:
Input pull-up MOS is always off.
On/Off: On when the pin is in the input state, P1DDR = 0, and P1PCR = 1: otherwise off.
7.2 Port
2
Port 2 is an 8-bit I/O port. Port 2 has an on-chip input pull-up MOS function that can be controlled
by software. Port 2 has the following registers.
by software. Port 2 has the following registers.
• Port 2 data direction register (P2DDR)
• Port 2 data register (P2DR)
• Port 2 pull-up MOS control register (P2PCR)
• Port 2 data register (P2DR)
• Port 2 pull-up MOS control register (P2PCR)
7.2.1
Port 2 Data Direction Register (P2DDR)
P2DDR specifies input or output for the pins of port 2 on a bit-by-bit basis.
Bit Bit
Name
Initial
Value R/W Description
Value R/W Description
7 P27DDR
0 W
6 P26DDR
0 W
5 P25DDR
0 W
4 P24DDR
0 W
3 P23DDR
0 W
2 P22DDR
0 W
1 P21DDR
0 W
0 P20DDR
0 W
The corresponding port 2 pins are output ports when
P2DDR bits are set to 1, and input ports when P2DDR
bits are cleared to 0.
P2DDR bits are set to 1, and input ports when P2DDR
bits are cleared to 0.