HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 310

• 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
Port E MOS Pull-Up Control Register (PEPCR)
PEPCR is an 8-bit readable/writable register that controls the MOS input pull-up function
incorporated into port E on an individual bit basis.
When a PEDDR bit is cleared to 0 (input port setting) when 8-bit bus mode is selected in mode 1,
2, 4, 5, or 6, or in mode 3 or 7, setting the corresponding PEPCR bit to 1 turns on the MOS input
pull-up for the corresponding pin.
PEPCR 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.
8.11.3
Modes 1, 2, 4, 5, and 6
In modes 1, 2, 4, 5, and 6, when 8-bit access is designated and 8-bit bus mode is selected, port E
pins are automatically designated as I/O ports. Setting a PEDDR bit to 1 makes the corresponding
port E pin an output port, while clearing the bit to 0 makes the pin an input port.
When 16-bit bus mode is selected, the input/output direction specification by PEDDR is ignored,
and port E is designated for data I/O.
Note: Modes 2 and 6 cannot be used in the H8S/2240.
Port E pin functions in modes 1, 2, 4, 5, and 6 are shown in figure 8.22.
Rev.3.00 Mar. 26, 2007 Page 268 of 772
REJ09B0355-0300
Bit
Initial value
R/W
Pin Functions
:
:
:
PE7PCR
R/W
7
0
PE6PCR
R/W
6
0
PE5PCR
R/W
5
0
PE4PCR
R/W
4
0
PE3PCR
R/W
3
0
PE2PCR
R/W
2
0
PE1PCR
R/W
1
0
PE0PCR
R/W
0
0