Rev.6.00 Oct.28.2004 page 323
of 1016
REJ09B0138-0600H
9.12.2
Register Configuration
Table 9-21 shows the port E register configuration.
Table 9-21 Port E Registers
Name
Abbreviation
R/W
Initial Value
Address
*
1
Port E data direction register
PEDDR
W
H'00
H'FEBD
Port E data register
PEDR
R/W
H'00
H'FF6D
Port E register
PORTE
R
Undefined
H'FF5D
Port E MOS pull-up control register
*
2
PEPCR
R/W
H'00
H'FF74
Notes: 1. Lower 16 bits of the address.
2. PEPCR settings are prohibited in the ROMless version.
Port E Data Direction Register (PEDDR)
Bit
:
7
6
5
4
3
2
1
0
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
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.
Note:
* Manual reset is only supported in the H8S/2357 ZTAT.
•
Mode 7*
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.
Note: * Modes 6 and 7 are provided in the on-chip ROM version only.
•
Modes 4 to 6*
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.
Port E Data Register (PEDR)
Bit
:
7
6
5
4
3
2
1
0
PE7DR
PE6DR
PE5DR
PE4DR
PE3DR
PE2DR
PE1DR
PE0DR
Initial value :
0
0
0
0
0
0
0
0
R/W
:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
PEDR is an 8-bit readable/writable register that stores output data for the port E pins (PE
7
to PE
0
).
Summary of Contents for ZTAT H8S/2357F
Page 4: ......
Page 28: ...Rev 6 00 Oct 28 2004 page xxiv of xxiv REJ09B0138 0600H...
Page 82: ...Rev 6 00 Oct 28 2004 page 54 of 1016 REJ09B0138 0600H...
Page 108: ...Rev 6 00 Oct 28 2004 page 80 of 1016 REJ09B0138 0600H...
Page 364: ...Rev 6 00 Oct 28 2004 page 336 of 1016 REJ09B0138 0600H...
Page 438: ...Rev 6 00 Oct 28 2004 page 410 of 1016 REJ09B0138 0600H...
Page 566: ...Rev 6 00 Oct 28 2004 page 538 of 1016 REJ09B0138 0600H...
Page 588: ...Rev 6 00 Oct 28 2004 page 560 of 1016 REJ09B0138 0600H...
Page 688: ...Rev 6 00 Oct 28 2004 page 660 of 1016 REJ09B0138 0600H...
Page 694: ...Rev 6 00 Oct 28 2004 page 666 of 1016 REJ09B0138 0600H...
Page 708: ...Rev 6 00 Oct 28 2004 page 680 of 1016 REJ09B0138 0600H...
Page 1044: ...Rev 6 00 Oct 28 2004 page 1016 of 1016 REJ09B0138 0600H...
