h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 309

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Port E Register (PORTE)
Note: * Determined by state of pins PE7 to PE0.
PORTE is an 8-bit read-only register that shows the pin states. It cannot be written to. Writing of
output data for the port E pins (PE7 to PE0) must always be performed on PEDR.
If a port E read is performed while PEDDR bits are set to 1, the PEDR values are read. If a port E
read is performed while PEDDR bits are cleared to 0, the pin states are read.
Pins used as LCD driver pins will return an undefined value if read.
After a reset and in hardware standby mode, PORTE contents are determined by the pin states, as
PEDDR and PEDR are initialized. PORTE retains its prior state in software standby mode.
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.
In modes 4 to 6 with 8-bit-bus mode selected, or in mode 7, if a pin is in the input state in
accordance with the settings in LPCR and PEDDR, setting the corresponding PEPCR bit to 1 turns
on the MOS input pull-up for that pin.
PEPCR is initialized to H'00 by a reset, and in hardware standby mode. It retains its prior state in
software standby mode.
Bit
Initial value :
R/W
Bit
Initial value :
R/W
:
:
:
:
PE7PCR PE6PCR PE5PCR PE4PCR PE3PCR PE2PCR PE1PCR PE0PCR
R/W
PE7
— *
R
7
7
0
R/W
PE6
— *
R
6
6
0
R/W
PE5
— *
R
5
5
0
R/W
PE4
— *
R
4
4
0
Rev. 5.00 Sep 22, 2005 page 283 of 1136
PE3
R/W
— *
R
3
3
0
PE2
R/W
— *
R
2
2
0
Section 9 I/O Ports
REJ09B0257-0500
PE1
R/W
— *
R
1
1
0
PE0
R/W
— *
R
0
0
0