EM357-RTR datasheet(95/240 Pages) ETC2

95 / 240 page

EM351 / EM357

8-24

120-035X-000D

Preliminary

SCx_TWICTRL2

SC1_TWICTRL2

TWI Control Register 2

Address: 0x4000C850 Reset: 0x0

SC2_TWICTRL2

TWI Control Register 2

Address: 0x4000C050 Reset: 0x0

SC_TWIACK

Bitname

Bitfield

Access

Description

SC_TWIACK

[0]

Setting this bit signals ACK after a received byte. Clearing this bit signals NACK after a

received byte.

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

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