ST52F510 datasheet(85/106 Pages) STMICROELECTRONICS

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ST52F510/F513/F514

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13.4.2 SCI Input Registers.

SCI RX data Input Register (SCI_IN)

Input Register 36 (024h) Read only

Reset Value: 0000 0000 (00h)

Bit 7-0: RX7-0 RX Data

In this register the last received serial data can be

read.

SCI Status Register (SCI_STATUS)

Input Register 37 (025h) Read only

Reset Value: 0000 0011 (03h)

Bit 7: NSERR Noise error

0: noise error not occurred

1: noise error occurred

Bit 6: FRERR Frame error

0: frame error not occurred

1: frame error occurred

Bit 5: RXF RX data register full

0: RX data register already read

1: RX data register full but not read yet

Bit 4: OVERR Overrun error

0: overrun error not occurred

1: overrun error occurred

Bit 3: not used

Bit 2: R8 Received 9th bit

0: RX 9th bit=0

1: RX 9th bit=1

Bit 1: TXEM TX data register empty

0: TX data register full

1: TX data register empty

Bit 0: TXEND TX end flag

0: data transferred to the shift register

1: data transmission completed

13.4.3 SCI Output Register.

SCI TX data Output Register (SCI_OUT)

Input Register 23 (017h) Write only

Reset Value: 0000 0000 (00h)

Bit 7-0: TX7-0 TX Data

In this register the serial data to be transmitted can

be written.

RX7

RX6

RX5

RX4

RX3

RX2

RX1

RX0

NSERR

FRERR

RXF

OVERR

TXEM

TXEND

TX7TX6

TX5TX4

TX3TX2

TX1TX0

ST52F510 数据表(PDF) 85 Page - STMicroelectronics

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