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EM351-RTR датащи(PDF) 93 Page - Silicon Laboratories

номер детали EM351-RTR
подробное описание детали  High-Performance, Integrated ZigBee/802.15.4 System-on-Chip
PDF  241 Pages
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производитель  SILABS [Silicon Laboratories]
домашняя страница  http://www.silabs.com
Logo SILABS - Silicon Laboratories

EM351-RTR датащи(HTML) 93 Page - Silicon Laboratories

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93
Rev 1.3
8.6. UART—Universal Asynchronous Receiver/Transmitter
The SC1 UART is enabled by writing 1 to SC1_MODE. The SC2 serial controller does not include UART functions.
The UART supports the following features:

Flexible baud rate clock (300 bps to 921.6 kbps)

Data bits (7 or 8)

Parity bits (none, odd, or even)

Stop bits (1 or 2)

False start bit and noise filtering

Receive and transmit FIFOs

Optional RTS/CTS flow control

Receive and transmit DMA channels
8.6.1. GPIO Usage
The UART uses two signals to transmit and receive serial data:

TXD (Transmitted Data) - serial data sent by the EM35x

RXD (Received Data) - serial data received by the EM35x
If RTS/CTS flow control is enabled, these two signals are also used:

nRTS (Request To Send) - indicates the EM35x is able to receive data

nCTS (Clear To Send) - inhibits sending data from the EM35x if not asserted
The GPIO pins assigned to these signals are shown in Table 8.10.
Table 8.10. UART GPIO Usage
TXD
RXD
nCTS1
nRTS*
Direction
Output
Input
Input
Output
GPIO Configuration
Alternate
Output (push-pull)
Input
Input
Alternate
Output (push-pull)
SC1 pin
PB1
PB2
PB3
PB4
*Note:
Only used if RTS/CTS hardware flow control is enabled.



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