Datasheet

Section 9 I/O Ports
Rev.6.00 Mar. 18, 2009 Page 361 of 980
REJ09B0050-0600
9.6.2 Port 8 Data Register (P8DR)
P8DR stores output data for the port 8 pins.
Bit Bit Name Initial Value R/W Description
7, 6 — All 0 — Reserved
These bits are always read as 0 and cannot be
modified.
5 P85DR 0 R/W
4 — 0 —
3 P83DR 0 R/W
2 — 0 —
1 P81DR 0 R/W
0 — 0 —
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.
9.6.3 Port 8 Register (PORT8)
PORT8 shows the pin states.
PORT8 cannot be modified.
Bit Bit Name Initial Value R/W Description
7, 6 — Undefined — Reserved
These bits are reserved, if read they will return an
undefined value.
5 P85 —
*
R
4 — Undefined R
3 P83 —
*
R
2 — Undefined R
1 P81 —
*
R
0 — Undefined 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 performed while P8DDR bits are cleared to 0, the
pin states are read.
Bits 4, 2, and 0 are reserved.
Note: * Determined by the states of pins P85, P83 and P81.