HD6432670 Hitachi, HD6432670 Datasheet - Page 510

• Manufacturer Part Number: HD6432670
• Description: (HD64F267x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

10.8.3
PORT8 shows the pin states.
PORT8 cannot be modified.
Bit
7
6
5
4
3
2
1
0
Note: Determined by the states of pins P85 to P80.
10.8.4
Port 8 pins also function as interrupt inputs and EXDMAC I/Os. The correspondence between the
register specification and the pin functions is shown below.
The pin function is switched as shown below according to the combination of bit AMS in
EDMDR3 of the EXDMAC, bit P85DDR, and bit ITS5 in ITSR.
Modes 1, 2, 3 (EXPE = 1), 4, 5, 6, 7 (EXPE = 1)
AMS
P85DDR
Pin function
Rev. 2.0, 04/02, page 464 of 906
P85/
Bit Name
—
—
P85
P84
P83
P82
P81
P80
Port 8 Register (PORT8)
Pin Functions
/
Initial Value
Undefined
Undefined
Undefined*
Undefined*
Undefined*
Undefined*
Undefined*
Undefined*
P85 input
0
R/W
—
—
R
R
R
R
R
R
0
P85 output
interrupt input*
Description
Reserved
These bits are reserved, if read they will return an
undefined value.
If a port 8 read is performed while P8DDR bits are
set to 1, the P8DR values are read. If a port 8 read is
performed while P8DDR bits are cleared to 0, the pin
states are read.
1
—
1
output