Port E Pull-Up Control Register (Pepcr); 10.13.5 Pin Functions - Hitachi H8S/2378, H8S/2378R Series Hardware Manual

10.13.4 Port E Pull-up Control Register (PEPCR)

PEPCR controls on/off states of the input pull-up MOS of port E. PEPCR is valid in 8-bit bus
mode.
Bit Bit Name
7 PE7PCR
6 PE6PCR
5 PE5PCR
4 PE4PCR
3 PE3PCR
2 PE2PCR
1 PE1PCR
0 PE0PCR

10.13.5 Pin Functions

Port E pins also function as the pins for data I/Os. The correspondence between the register
specification and the pin functions is shown below.
PE7/D7, PE6/D6, PE5/D5, PE4/D4, PE3/D3, PE2/D2, PE1/D1, PE0/D0
The pin function is switched as shown below according to the operating mode, bus mode, bit
EXPE, and bit PEDDR.
Operating
mode
Bus mode All areas
8-bit space
EXPE
PEDDR 0
Pin function PE
input
Initial Value R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
1, 2, 4, 5, 6
At least
one area
16-bit
space
— —
1 —
PE Data I/O
output
Description
When PEDDR = 0 (input port), the input pull-up MOS
of the input pin is on when the corresponding bit is
set to 1.
7
— All areas
8-bit space
0
0 1 0
PE PE PE
input output input
At least
one area
16-bit
space
1 1
1 —
PE Data I/O
output
Rev. 1.0, 09/01, page 473 of 904