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Mini57
Apr. 06, 2017
Page 314 of 475
Rev.1.00
MINI5
7
S
E
RI
E
S
TECH
NIC
A
L R
E
F
E
RE
N
CE
MA
N
UA
L
6.12.4 Basic Configuration
The basic configurations of USCI0 for UART mode are as follows.
USCI0 pins are configured in SYS_GPA_MFP, SYS_GPC_MFP, SYS_GPD_MFP
registers.
Enable USCI0 peripheral clock in USCI0CKEN (CLK_APBCLK[24]).
Reset USCI0 controller in USCI0RST (SYS_IPRST1[24]).
The basic configurations of USCI1 for UART mode are as follows.
USCI1 pins are configured in SYS_GPA_MFP, SYS_GPC_MFP, SYS_GPD_MFP
registers.
Enable USCI1 peripheral clock in USCI1CKEN (CLK_APBCLK[25]).
Reset USCI1 controller in USCI1RST (SYS_IPRST1[25]).
6.12.5 Functional Description
6.12.5.1 USCI Common Function Description
Please refer to section 6.11.4 for detailed information.
6.12.5.2 Signal Description
An UART connection is characterized by the use of a single connection line between a transmitter
and a receiver. The receiver input signal (RXD) is handled by the input stage USCIx_DAT0 and
the transmit output (TXD) signal is handled by the output stage of USCIx_DAT1.
For full-duplex communication, an independent communication line is needed for each transfer
direction. Figure 6.12-2 shows an example with a point-to-point full-duplex connection between
two communication partners UART module A and UART module B.
RX_BUF
TX_BUF
Transfer
Control
Baud Rate
Generator
UART Module A
f
PCLK
USCIx_DAT0
USCIx_DAT1
RX_BUF
TX_BUF
Transfer
Control
Baud Rate
Generator
UART Module B
f
PCLK
USCIx_DAT1
USCIx_DAT0
RXD
TXD
TXD
RXD
Figure 6.12-2 UART Signal Connection for Full-Duplex Communication
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