5 port 1 input pull-up mos, 2 port 2, 1 port 2 data direction register (p2ddr) – Renesas H8S/2111B User Manual
Page 136

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.
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:
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.
• Port 2 data direction register (P2DDR)
• 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
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.