NXP Semiconductors /LPC408x_7x /UART4 /SYNCCTRL

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Interpret as SYNCCTRL

31 2827 2423 2019 1615 1211 87 43 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (DISABLED)SYNC 0 (SYNCHRONOUS_SLAVE_MO)CSRC 0 (RXD_IS_SAMPLED_ON_TH)FES 0 (THE_INPUT_CLOCK_IS_S)TSBYPASS 0 (SCLK_CYCLES_ONLY_WHE)CSCEN 0 (SEND_START_AND_STOP_)SSSDIS 0RESERVED

SYNC=DISABLED, SSSDIS=SEND_START_AND_STOP_, CSRC=SYNCHRONOUS_SLAVE_MO, TSBYPASS=THE_INPUT_CLOCK_IS_S, CCCLR=CSCEN_IS_UNDER_SOFTW, FES=RXD_IS_SAMPLED_ON_TH, CSCEN=SCLK_CYCLES_ONLY_WHE

Description

Synchronous mode control register.

Fields

SYNC

Enables synchronous mode.

0 (DISABLED): Disabled

1 (ENABLED): Enabled

CSRC

Clock source select.

0 (SYNCHRONOUS_SLAVE_MO): Synchronous slave mode (SCLK in)

1 (SYNCHRONOUS_MASTER_M): Synchronous master mode (SCLK out)

FES

Falling edge sampling.

0 (RXD_IS_SAMPLED_ON_TH): RxD is sampled on the rising edge of SCLK

1 (RXD_IS_SAMPLED_ON_TH): RxD is sampled on the falling edge of SCLK

TSBYPASS

Transmit synchronization bypass in synchronous slave mode.

0 (THE_INPUT_CLOCK_IS_S): The input clock is synchronized prior to being used in clock edge detection logic.

1 (THE_INPUT_CLOCK_IS_N): The input clock is not synchronized prior to being used in clock edge detection logic. This allows for a high er input clock rate at the expense of potential metastability.

CSCEN

Continuous master clock enable (used only when CSRC is 1)

0 (SCLK_CYCLES_ONLY_WHE): SCLK cycles only when characters are being sent on TxD

1 (SCLK_RUNS_CONTINUOUS): SCLK runs continuously (characters can be received on RxD independently from transmission on TxD)

SSSDIS

Start/stop bits

0 (SEND_START_AND_STOP_): Send start and stop bits as in other modes.

1 (NOSTARTSTOPBIT): Do not send start/stop bits.

CCCLR

Continuous clock clear

0 (CSCEN_IS_UNDER_SOFTW): CSCEN is under software control.

1 (HARDWARE_CLEARS_CSCE): Hardware clears CSCEN after each character is received.

RESERVED

Reserved. The value read from a reserved bit is not defined.

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