HD6432670 Hitachi, HD6432670 Datasheet - Page 505

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

10.7.3
PORT7 shows the pin states.
PORT7 cannot be modified.
Bit
7
6
5
4
3
2
1
0
Note: Determined by the states of pins P75 to P70.
10.7.4
Port 7 pins also function as DMAC I/Os 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 DMACS in
PFCR2, bit SAE1 in DMABCRH, bit AMS in EDMDR1, and bit P75DDR.
Modes 1, 2, 3* (EXPE = 1), 4, 5, 6, 7 (EXPE = 1)
AMS
SAE1
DMACS
P75DDR
Pin function
P75/
Bit Name
—
—
P75
P74
P73
P72
P71
P70
Port 7 Register (PORT7)
Pin Functions
/
Initial Value
Undefined
Undefined
Undefined*
Undefined*
Undefined*
Undefined*
Undefined*
Undefined*
input
P75
0
—
0
output
P75
1
R/W
—
—
R
R
R
R
R
R
input
P75
0
0
Description
Reserved
These bits are reserved, if read they will return an
undefined value.
If a port 7 read is performed while P7DDR bits are
set to 1, the P7DR values are read. If a port 7 read is
performed while P7DDR bits are cleared to 0, the pin
states are read.
0
output
P75
1
1
output
—
1
Rev. 2.0, 04/02, page 459 of 906
output
—
—
—
1