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Section 8 I/O Ports
Port 8 pins
P8 /
P8 /
P8 /
Port 8
P8 /
P8 /
Pin functions in mode 6 and 7
(single-chip mode)
P8 /(input/output)
P8 /(input/output)/
P8 /(input/output)/
P8 /(input/output)/
P8 /(input/output)/
8.9.2
Register Descriptions
Table 8.13 summarizes the registers of port 8.
Table 8.13 Port 8 Registers
Address*
Name
H'EE007
Port 8 data direction
register
H'FFFD7
Port 8 data register
Note: * Lower 20 bits of the address in advanced mode.
Rev. 4.00 Jan 26, 2006 page 296 of 938
REJ09B0276-0400
CS
4
0
CS
/
IRQ / ADTRG
3
1
3
CS
/
IRQ
2
2
2
CS
/
IRQ
1
3
1
RFSH
/
IRQ
0
0
4
IRQ
(input) /
3
3
IRQ
(input)
2
2
IRQ
(input)
1
1
IRQ
(input)
0
0
Figure 8.8 Port 8 Pin Configuration
Abbreviation
P8DDR
P8DR
Pin functions in modes 1 to 5
(expanded modes)
P8 (input)/
CS
(output)
4
0
P8 (input)/
CS
(output)/
3
1
P8 (input)/
CS
(output)/
2
2
P8 (input/output)/ CS
1
3
P8 (input/output)/
RFSH
0
ADTRG (input)
Initial Value
R/W
Mode 1 to 4
W
H'F0
R/W
H'E0
IRQ
(input) / ADTRG (input)
3
IRQ
(input)
2
(output)/IRQ
(input)
1
(output)/
IRQ
(input)
0
Mode 5 to 7
H'E0
H'E0
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