DMC73C168 데이터 시트보기 (PDF) - Daewoo Semiconductor

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DMC73C168

8Bit Single Chip Microcontroller

Daewoo Semiconductor 

8Bit Single Chip Microcontroller

25

DMC73C168

6) SERIAL I/O REGISTERS

PF NAME : SIO1CTL

: SERIAL I/O 1 CONTROL REGISTER

R/W BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0

P27

READ SIO1AF CKSRC1 BAU11 BAU10 SIO1EF SCLK1E SO1ENA X

>011B WRITE SIO1ST CKSRC1

SIO1EC SCLK1E SO1ENA X

RESET VALUE

O

O

O

O

O

O

O

X

SIO1AF :

SIO1 operation flag bit.

This read bit determines SIO1 is enabled or not.

0 = SIO1 is stop state

1 = SIO1 is processing state

SIO1ST :

SIO1 start enable bit

This write bit determines SIO1 is start or not.

0 = SIO1 is stop

1 = SIO1 is started

* Caution : This bit should be reset to "0" before 8bit transmition for proper SIO

operation.

CKSRC1 :

SIO1 clock source selection bit

This read/write bit determines SIO1 clock source in from external or internal.

0 = SIO1 clock is from internal

1 = SIO1 clock is from external

BAU1n :

SIO1 transmission speed select bits.

This read/write bits determine SIO1 transmission speed.

BAU11

0

0

1

1

BAU10

0

1

0

1

SCLK FREQ. (Fosc = 4.5MKHz)

Fosc/8

= 563 KHz

Fosc/16 = 281 KHz

Fosc/32 = 141 KHz

Fosc/64 =

70 KHz

SIO1EF :

Transmission error flag bit

This read bit shows overrun error was occured or not

0 = Overrun error is not occured

1 = Overrun error is occured

SIO1EC :

Transmission error flag clear bit

This write bit determines transmission error flag is cleared or not

0 = Transmission error flag is not affected

1 = Transmission error flag is cleared

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