9.6.2
Port 8 Data Register (P8DR)
P8DR stores output data for the port 8 pins.
Bit
Bit Name
Initial Value
7
—
0
6
—
0
5
P85DR
0
4
—
0
3
P83DR
0
2
—
0
1
P81DR
0
0
—
0
9.6.3
Port 8 Register (PORT8)
PORT8 shows the pin states.
PORT8 cannot be modified.
Bit
Bit Name
Initial Value
7
—
Undefined
6
—
Undefined
5
P85
—*
4
—
Undefined
3
P83
—*
2
—
Undefined
1
P81
—*
0
—
Undefined
Note: * Determined by the states of pins P85, P83 and P81.
R/W
Description
—
Reserved
These bits are always read as 0 and cannot be
—
modified.
R/W
Bits 5, 3, and 1 store output data when the pin
function is specified to a general purpose I/O.
—
Bits 4, 2, and 0 are reserved.
R/W
—
R/W
—
R/W
Description
—
Reserved
These bits are reserved, if read they will return an
—
undefined value.
R
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
R
performed while P8DDR bits are cleared to 0, the pin
R
states are read.
R
Bits 4, 2, and 0 are reserved.
R
R
Rev. 2.00, 05/03, page 337 of 820