Rev. 1.0, 09/01, page 473 of 904
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
Initial Value
R/W
Description
7
PE7PCR
0
R/W
6
PE6PCR
0
R/W
5
PE5PCR
0
R/W
4
PE4PCR
0
R/W
3
PE3PCR
0
R/W
2
PE2PCR
0
R/W
1
PE1PCR
0
R/W
0
PE0PCR
0
R/W
When PEDDR = 0 (input port), the input pull-up MOS
of the input pin is on when the corresponding bit is
set to 1.
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
1, 2, 4, 5, 6
7
Bus mode
All areas
8-bit space
At least
one area
16-bit
space
—
All areas
8-bit space
At least
one area
16-bit
space
EXPE
—
—
0
1
1
PEDDR
0
1
—
0
1
0
1
—
Pin function
PE
input
PE
output
Data I/O
PE
input
PE
output
PE
input
PE
output
Data I/O
Содержание H8S/2376 F-ZTAT
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