Renesas H8/3067 Series User Manual page 323

Table 8.14 Port 8 Pin Functions in Modes 1 to 5
Pin
P8 /CS
4 0
P8 /CS /IRQ /ADTRG
3 1 3
P8 /CS /IRQ
2 2 2
P8 /CS /IRQ
1 3 1
P8 /RFSH/IRQ
0 0
Pin Functions and Selection Method
Bit P8 DDR selects the pin function as follows
4
P8 DDR
4
Pin function
Bit P8 DDR selects the pin function as follows
3
P8 DDR
3
Pin function
The DRAM interface settings by bits DRAS2 to DRAS0 in DRCRA, and bit P8
pin function as follows.
DRAM interface
settings
P8 DDR
2
Pin function
Note: * CS is output as RAS
2
DRAM interface
setting (1)
DRAS2
DRAS1
DRAS0 0
The DRAM interface settings by bits DRAS2 to DRAS0 in DRCRA, and bit P8
pin function as follows.
DRAM interface
settings (1) in table below
P8 DDR
1
Pin function
P8
1
CS is output as RAS
Note: *
3
DRAM interface
setting
DRAS2
DRAS1
DRAS0 0
Bit RFSHE in DRCRA and bit P8
RFSHE
P8 DDR
0
Pin function
Note: * If areas 2 to 5 are not designated as DRAM space, this bit should not be set to 1.
0
P8 input
4
0
P8 input
3
IRQ
ADTRG input
(1) in table below
0 1
CS
P8 input output
2 2
IRQ
.
2
0
0 1
1 0 1
(2) in table below
0 1 0
CS
input output P8 input
3 1
pin pin pin
IRQ
.
3
(1) (3) (2)
0
0 1
1 0 1
DDR select the pin function as follows.
0
0
0 1
P8 input P8 output
0 0
IRQ
Rev. 4.00 Jan 26, 2006 page 299 of 938
Section 8 I/O Ports
1
CS
output
0
1
CS
output
1
input
3
DDR, select the
2
|(2) in table below
—
CS
output*
2
input
3
(2)
1
0
0 1 0
DDR, select the
1
(3) in table below
1 —
CS
output pin*
P8 output
1
3
pin
input pin
1
(3)
1
0
0 1 0
1*
—
RFSH output
input
0
REJ09B0276-0400
1
1
(2)
1
1