Renesas Hitachi H8S/2191, Hardware Manual

Page: 288 / 1065

Rev. 2.0, 11/00, page 261 of 1037
11.6 Port 4
11.6.1 Overview
Port 4 is an 8-bit I/O port. Table 11.14 shows the port 4 configuration.
Port 4 consists of pins that are used both as standard I/O ports (P47 to P40) and output compare
output (FTOA, FTOB), input capture input (FTIA, FTIB, FTIC, FTID) or 14-bit PWM output
(PWM14). It is switched by port mode register 4 (PRM4), timer output compare control register
(TOCR), and port control register 4 (PCR4).
Table 11.14 Port 4 Configuration
Port Function Alternative Function
P47 (standard I/O port) None
P46 (standard I/O port) FTOB (timer X1 output compare output)
P45 (standard I/O port) FTOA (timer X1 output compare output)
P44 (standard I/O port) FTID (timer X1 input capture input)
P43 (standard I/O port) FTIC (timer X1 input capture input)
P42 (standard I/O port) FTIB (timer X1 input capture input)
P41 (standard I/O port) FTIA (timer X1 input capture input)
Port 4
P40 (standard I/O port) PWM14 (14-bit PWM output)
11.6.2 Register Configuration
Table 11.15 shows the port 4 register configuration.
Table 11.15 Port 4 Register Configuration
Name Abbrev. R/W Size Initial Value Address *
Port mode register 4 PMR4 R/W Byte H'FE H'FFDB
Port control register 4 PCR4 W Byte H'00 H'FFD4
Port data register 4 PDR4 R/W Byte H'00 H'FFC4
Note:
*
Lower 16 bits of the address.