H83397 Datasheet, PDF (168/747 Pages) Renesas Technology Corp – Single-Chip Microcomputer

7.7 Port 6
7.7.1 Overview
Port 6 is an 8-bit input/output port that is multiplexed with input/output pins (FTOA, FTOB, FTIA
to FTID, FTCI) of the 16-bit free-running timer (FRT), with key-sense input pins, and with IRQ₆
and IRQ₇ input pins. The port 6 pin functions are the same in all operating modes. Figure 7.14
shows the pin configuration of port 6.
Port 6 has built-in, software-controllable MOS input pull-up transistors.
Pins in port 6 can drive one TTL load and a 90-pF capacitive load. They can also drive a
darlington pair.
Port 6
Port 6 pins
P6₇ (input/output)/IRQ₇ (input)/KEYIN₇ (input)
P6₆ (input/output)/FTOB (output)/IRQ₆ (input)/KEYIN₆ (input)
P6₅ (input/output)/FTID (input)/KEYIN₅ (input)
P6₄ (input/output)/FTIC (input)/KEYIN₄ (input)
P6₃ (input/output)/FTIB (input)/KEYIN₃ (input)
P6₂ (input/output)/FTIA (input)/KEYIN₂ (input)
P6₁ (input/output)/FTOA (output)/KEYIN₁ (input)
P6₀ (input/output)/FTCI (input)/KEYIN₀ (input)
Figure 7.14 Port 6 Pin Configuration
7.7.2 Register Configuration and Descriptions
Table 7.12 summarizes the port 6 registers.
Table 7.12 Port 6 Registers
Name
Port 6 data direction register
Port 6 data register
Port 6 input pull-up control
register
Abbreviation
P6DDR
P6DR
KMPCR
Read/Write
W
R/W
R/W
Initial Value
H'00
H'00
H'00
Address
H'FFB9
H'FFBB
H'FFF2
138