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8.4
Port 3
8.4.1
Overview
Port 3 is an 8-bit I/O port, configured as shown in figure 8.3.
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.
8.4.2
Register Configuration and Description
Table 8.8 shows the port 3 register configuration.
Table 8.8
Port 3 Registers
Name
Port data register 3
Port control register 3
Port pull-up control register 3
Port mode register 2
Port mode register 3
Note:
* H'58 in the H8/38347 Group and H8/38447 Group.
Port 3
Figure 8.3 Port 3 Pin Configuration
Abbr.
PDR3
PCR3
PUCR3
PMR2
PMR3
P3 /AEVL
7
P3 /AEVH
6
P3 /TXD
5
31
P3 /RXD
4
31
P3 /SCK
3
31
1
P3 /RESO*
2
2
P3 /UD/EXCL*
1
P3 /PWM
0
R/W
Initial Value
R/W
H'00
W
H'00
R/W
H'00
R/W
H'D8*
R/W
H'04
Rev. 6.00 Aug 04, 2006 page 219 of 680
Section 8 I/O Ports
Address
H'FFD6
H'FFE6
H'FFE1
H'FFC9
H'FFCA
REJ09B0145-0600
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