Port 3; Overview; Register Configuration - Renesas Hitachi H8S/2194 Series Hardware Manual

11.5

Port 3

11.5.1

Overview

Port 3 is an 8-bit I/O port. Table 11.11 shows the port 3 configuration.
Port 3 consists of pins that are used both as standard I/O ports (P37 to P30) and timer J timer
output (TMO), buzzer output (BUZZ), 8-bit PWN outputs (PWN3 to PWN0), SCI2 strobe output
(STRB), or chip select input (
control register 3 (PCR3).
Port 3 can select the MOS pull-up function.
Table 11.11 Port 3 Configuration
Port Function
Port 3 P37 (standard I/O port)
P36 (standard I/O port)
P35 (standard I/O port)
P34 (standard I/O port)
P33 (standard I/O port)
P32 (standard I/O port)
P31 (standard I/O port)
P30 (standard I/O port)
11.5.2

Register Configuration

Table 11.12 shows the port 3 register configuration.
Table 11.12 Port 3 Register Configuration
Name
Port mode register 3
Port control register 3
Port data register 3
MOS pull-up select
register 3
Note: Lower 16 bits of the address.
*
Rev. 2.0, 11/00, page 254 of 1037
$
). It is switched by port mode register 3 (PMR3) and port
Abbrev. R/W
PMR3 R/W
PCR3 W
PDR3 R/W
PUR3 R/W
Alternative Function
TMO (timer J timer output)
BUZZ (timer J buzzer output)
PWM3 (8-bit PWM output)
PWM2 (8-bit PWM output)
PWM1 (8-bit PWM output)
PWM0 (8-bit PWM output)
STRB (SCI2 strobe output)
$
(SCI2 chip select input)
Size Initial Value
Byte H'00
Byte H'00
Byte H'00
Byte H'00
Address*
H'FFD0
H'FFD3
H'FFC3
H'FFE3