H8S-2350 RENESAS [Renesas Technology Corp], H8S-2350 Datasheet - Page 428
H8S-2350
Manufacturer Part Number
H8S-2350
Description
16-Bit Single-Chip Microcomputer
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.H8S-2350.pdf
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Section 9 I/O Ports
9.12.2
Table 9.21 shows the port E register configuration.
Table 9.21 Port E Registers
Notes: 1. Lower 16 bits of the address.
Port E Data Direction Register (PEDDR)
PEDDR is an 8-bit 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.
PEDDR 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.
Rev. 3.00 Sep 15, 2006 page 394 of 988
REJ09B0330-0300
Name
Port E data direction register
Port E data register
Port E register
Port E MOS pull-up control register *
Bit
Initial value
R/W
Modes 1, 4, 5 [H8S/2350]; modes 1, 2, and 4 to 6 [H8S/2351]
When 8-bit bus mode has been selected, port E pins function 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 has been selected, the input/output direction specification by PEDDR is
ignored, and port E is designated for data I/O.
For details of 8-bit and 16-bit bus modes, see section 6, Bus Controller.
Modes 3 and 7 [H8S/2351 only]
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.
2. Only applies to the H8S/2351.
Register Configuration
:
:
:
PE7DDR
W
7
0
PE6DDR
W
6
0
2
PE5DDR
PEDDR
Abbreviation
PEDR
PORTE
PEPCR
W
5
0
PE4DDR
W
4
0
PE3DDR
R/W
W
R/W
R
R/W
W
3
0
Initial Value
H'00
H'00
Undefined
H'00
PE2DDR
W
2
0
PE1DDR
W
1
0
Address *
H'FEBD
H'FF6D
H'FF5D
H'FF74
PE0DDR
W
0
0
1
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