h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 252
h8s-2649
Manufacturer Part Number
h8s-2649
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2649.pdf
(766 pages)
- Current page: 252 of 766
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Section 9 I/O Ports
9.11
Port E is an 8-bit I/O port. Port E has a data bus I/O function, and the pin functions change
according to the operating mode and whether 8-bit or 16-bit bus mode is selected.
Port E has a built-in MOS input pull-up function that can be controlled by software.
• Port E data direction register (PEDDR)
• Port E data register (PEDR)
• Port E register (PORTE)
• Port E pull-up MOS control register (PEPCR)
9.11.1
PEDDR is a write-only register, the individual bits of which specify input or output for the pins of
port E. PEDDR cannot be read; if it is, an undefined value will be read.
Rev. 2.00 Dec. 05, 2005 Page 214 of 724
REJ09B0200-0200
Bit
7
6
5
4
3
2
1
0
Port E
Port E Data Direction Register (PEDDR)
Bit Name
PE7DDR
PE6DDR
PE5DDR
PE4DDR
PE3DDR
PE2DDR
PE1DDR
PE0DDR
Initial
Value
0
0
0
0
0
0
0
0
R/W
W
W
W
W
W
W
W
W
Description
Setting a PEDDR bit to 1 makes the corresponding port
E pin an output pin, while clearing the bit to 0 makes the
pin an input pin.
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