IA82527
Data Sheet
CAN Serial Communications Controller
December 20, 2012
Table 3. Pin/Signal Descriptions (Continued)
Pin
Signal
p1.0
Name
PLCC PQFP
Description
ad8/d0/p1.0
ad9/d1/p1.1
ad10/d2/p1.2
ad11/d3/p1.3
ad12/d4/p1.4
ad13/d5/p1.5
ad14/d6/p1.6
ad15/d7/p1.7
38
37
36
35
34
33
32
31
32
31
30
29
28
27
26
25
port 1, bit N (N = 7–0). Input/Output (general-
purpose). Mode 0, Mode 2, and Serial Interface Mode.
Port 1 bits p1.7–p1.0 can be individually programmed
as inputs or outputs. Programming is accomplished by
writing to the P1CONF Register (9FH). The 8 bits of
the P1CONF Register, P1CONF7–P1CONF0,
correspond directly to pins p1.7–p1.0. Writing a 0 to a
bit in the P1CONF Register causes the corresponding
pin to be configured as a high-impedance input.
Writing a 1 to a bit in the P1CONF Register causes the
corresponding pin to be configured as a push-pull
output. All Port 1 pins have weak pull-ups until the
port is configured by writing to the P1CONF Register.
The default value of the P1CONF Register following a
reset is 00H.
p1.1
p1.2
p1.3
p1.4
p1.5
p1.6
p1.7
Data is read from Port 1 via the P1IN Register (BFH).
A logic 0 for any bit in this register means that a logic 0
was read from the corresponding pin; a logic 1 for any
bit means that a logic 1 was read from the
corresponding pin. The default value of the P1IN
Register following a reset is FFH.
Data is written to Port 1 via the P1OUT Register
(DFH). Writing a logic 0 to any bit in this register
means that a logic 0 is written to the corresponding
pin; writing a logic 1 to any bit means that a logic 1 is
written to the corresponding pin. The default value of
the P1OUT Register following a reset is 00H.
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