Section 8 I/O Ports
Rev. 6.00 Aug 04, 2006 page 219 of 680
REJ09B0145-0600
8.4
Port 3
8.4.1
Overview
Port 3 is an 8-bit I/O port, configured as shown in figure 8.3.
P3 /AEVL
P3 /AEVH
P3 /TXD
7
6
5
Port 3
Notes: 1. The
RESO
function is not implemented in the H8/38347 Group and H8/38447 Group.
2. The EXCL function only applies to the H8/38347 Group and H8/38447 Group.
31
P3 /RXD
P3 /SCK
P3 /
RESO
*
1
4
3
2
31
31
P3 /UD/EXCL
*
2
P3 /PWM
1
0
Figure 8.3 Port 3 Pin Configuration
8.4.2
Register Configuration and Description
Table 8.8 shows the port 3 register configuration.
Table 8.8
Port 3 Registers
Name
Abbr.
R/W
Initial Value
Address
Port data register 3
PDR3
R/W
H'00
H'FFD6
Port control register 3
PCR3
W
H'00
H'FFE6
Port pull-up control register 3
PUCR3
R/W
H'00
H'FFE1
Port mode register 2
PMR2
R/W
H'D8
*
H'FFC9
Port mode register 3
PMR3
R/W
H'04
H'FFCA
Note:
*
H'58 in the H8/38347 Group and H8/38447 Group.
Содержание H8/38342
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