Port 8; 11.10.1 Overview; Register Configuration - Renesas Hitachi H8S/2194 Series Hardware Manual

11.10

Port 8

11.10.1 Overview

Port 8 is an 8-bit I/O port. Table 11.26 shows the port 8 configuration.
Port 8 is a CMOS high-current I/O port. The sink current is 20 mA max. (V
to four pins can simultaneously be set on.
Port 8 consists of pins that are used both as high-current I/O ports (P87 to P80) and servo
monitor output (SV1, SV2), capstan external synchronous signal input (EXCAP), or external
trigger signal input (EXTTRG). It is switched by port mode register 8 (PMR8) and port control
register 8 (PCR8).
Table 11.26 Port 8 Configuration
Port Function
Port 8 P87 (high-current I/O port)
P86 (high-current I/O port)
P85 (high-current I/O port)
P84 (high-current I/O port)
P83 (high-current I/O port)
P82 (high-current I/O port)
P81 (high-current I/O port)
P80 (high-current I/O port)

11.10.2 Register Configuration

Table 11.27 shows the port 8 register configuration.
Table 11.27 Port 8 Register Configuration
Name
Port mode register 8
Port control register 8
Port data register 8
Note: The address indicates the low-order 16 bits.
*
Alternative Function
None
None
None
None
SV2 (servo monitor output)
SV1 (servo monitor output)
EXCAP (capstan external synchronous signal input)
EXTTRG (external trigger signal input)
Abbrev. R/W
PMR8 R/W
PCR8 W
PDR8 R/W
Size Initial Value
Byte H'F0
Byte H'00
Byte H'00
Rev. 2.0, 11/00, page 283 of 1037
= 1.5 V) and up
OL
Address*
H'FFDF
H'FFD8
H'FFC8