HD6413003RVF RENESAS [Renesas Technology Corp], HD6413003RVF Datasheet - Page 272

• Manufacturer Part Number: HD6413003RVF
• Description: microcontroller (MCU)
• Manufacturer: RENESAS [Renesas Technology Corp]

9.6 Port 8
9.6.1 Overview
Port 8 is a 5-bit input/output port that is also used for CS
to IRQ
the pin configuration of port 8.
Pins in port 8 can drive one TTL load and a 90-pF capacitive load. They can also drive a
darlington transistor pair. Pins P8
9.6.2 Register Descriptions
Table 9-9 summarizes the registers of port 8.
Table 9-9 Port 8 Registers
Address*
H'FFCD
H'FFCF
Note: * Lower 16 bits of the address.
0
input. Port 8 has the same set of pin functions in all operating modes. Figure 9-9 shows
Name
Port 8 data direction register
Port 8 data register
Port 8
Figure 9-9 Port 8 Pin Configuration
2
Port 8 pins
P8 (input)/CS (output)
P8 (input)/CS (output)/IRQ (input)
P8 (input)/CS (output)/IRQ (input)
P8 (input)/CS (output)/IRQ (input)
P8 (input/output)/
to P8
4
3
2
1
0
0
have Schmitt-trigger inputs.
254
0
1
2
3
RFSH (output)/IRQ (input)
Abbreviation
P8DDR
P8DR
3
to CS
0
3
2
1
output, RFSH output, and IRQ
0
R/W
W
R/W
Initial Value
H'F0
H'E0
3