8. I/O Ports
Rev.3.00 Jul. 19, 2007 page 194 of 532
REJ09B0397-0300
8.5 Port
4
Port 4 functions are common to the H8/3857 Group and H8/3854 Group.
8.5.1 Overview
Port 4 consists of a 3-bit I/O port and a 1-bit input port, and is configured as shown in figure 8.4.
P4 /
IRQ
P4 /TXD
P4 /RXD
P4 /SCK
3
2
1
0
Port 4
3
0
Figure 8.4 Port 4 Pin Configuration
8.5.2
Register Configuration and Description
Table 8.11 shows the port 4 register configuration.
Table 8.11 Port 4 Registers
Name Abbr.
R/W
Initial
Value
Address
Port data register 4
PDR4
R/W
H'F8
H'FFD7
Port control register 4
PCR4
W
H'F8
H'FFE7
Summary of Contents for F-ZTAT H8 Series
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