H8S-2350 RENESAS [Renesas Technology Corp], H8S-2350 Datasheet - Page 431

• Manufacturer Part Number: H8S-2350
• Description: 16-Bit Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

9.12.3
Modes 1, 4, and 5 [H8S/2350]; Modes 1, 2, and 4 to 6 [H8S/2351]
In modes 1, 2, and 4 to 6, when 8-bit access is designated and 8-bit bus mode is selected, port E
pins are automatically designated 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 is selected, the input/output direction specification by PEDDR is ignored,
and port E is designated for data I/O.
Port E pin functions in modes 1, 2, and 4 to 6 are shown in figure 9.23.
Modes 3 and 7 [H8S/2351 Only]
In modes 3 and 7, port E pins function as I/O ports. Input or output can be specified for each pin
on a bit-by-bit basis. 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.
Port E pin functions in modes 3 and 7 are shown in figure 9.24.
Pin Functions
Figure 9.23 Port E Pin Functions (Modes 1, 2, and 4 to 6)
Port E
8-bit bus mode
PE
PE
PE
PE
PE
PE
PE
PE
7
6
5
4
3
2
1
0
(I/O)
(I/O)
(I/O)
(I/O)
(I/O)
(I/O)
(I/O)
(I/O)
Rev. 3.00 Sep 15, 2006 page 397 of 988
16-bit bus mode
D
D
D
D
D
D
D
D
7
6
5
4
3
2
1
0
(I/O)
(I/O)
(I/O)
(I/O)
(I/O)
(I/O)
(I/O)
(I/O)
Section 9 I/O Ports
REJ09B0330-0300