XC886/888CLM
Serial Interfaces
User’s Manual
12-23
V1.3, 2010-02
Serial Interfaces, V 1.0
12.1.5
Port Control
The UART modules shift in data through RXD which can be selected from three different
sources, RXD_0, RXD_1 and RXD_2. This selection is performed by the SFR bits
MODPISEL.URRIS and MODPISEL.URRISH in UART module, and
MODPISEL1.UR1RIS in UART1 module.
MODPISEL
Peripheral Input Select Register
Reset Value: 00
H
7
6
5
4
3
2
1
0
0
URRISH
JTAGTDIS
JTAGTCK
S
EXINT2IS
EXINT1IS
EXINT0IS
URRIS
r
rw
rw
rw
rw
rw
rw
rw
Field
Bits
Type Description
URRISH, URRIS
6,0
rw
UART Receive Input Select [6,0]
00
UART Receiver Input RXD_0 is selected.
01
UART Receiver Input RXD_1 is selected.
10
UART Receiver Input RXD_2 is selected.
11
Reserved
0
7
r
Reserved
Returns 0 if read; should be written with 0.
MODPISEL1
Peripheral Input Select Register 1
Reset Value: 00
H
7
6
5
4
3
2
1
0
EXINT6IS
0
UR1RIS
T21EXIS
JTAGTDI
S1
JTAGTCK
S1
rw
r
rw
rw
rw
rw
Field
Bits
Type Description
UR1RIS
[4:3]
rw
UART1 Receive Input Select
00
UART1 Receiver Input RXD_0 is selected.
01
UART1 Receiver Input RXD_1 is selected.
10
UART1 Receiver Input RXD_2 is selected.
11
Reserved
*
Содержание XC886CLM
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