HD6413002 Datasheet, PDF (261/700 Pages) Renesas Technology Corp – High-performance single-chip microcontroller

9.3 Port 6
9.3.1 Overview
Port 6 is a 3-bit input/output port that is also used for input and output of bus control signals
(BACK, BREQ, and WAIT). Port 6 has the same set of pin functions in all operating modes.
Figure 9-4 shows the pin configuration of port 6.
Pins in port 6 can drive one TTL load and a 90-pF capacitive load. They can also drive a
darlington transistor pair.
Port 6
Port 6 pins
P6₂ (input/output)/BACK (output)
P6₁ (input/output)/BREQ (input)
P6₀ (input/output)/WAIT (input)
Figure 9-4 Port 6 Pin Configuration
9.3.2 Register Descriptions
Table 9-4 summarizes the registers of port 6.
Table 9-4 Port 6 Registers
Address*
Name
H'FFC9
Port 6 data direction register
H'FFCB
Port 6 data register
Note: * Lower 16 bits of the address.
Abbreviation
P6DDR
P6DR
R/W Initial Value
W
H'80
R/W H'80
247