DSP56303 datasheet(270/292 Pages) FREESCALE

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DSP56303 User’s Manual, Rev. 2

B-26

Freescale Semiconductor

Programming Reference

Figure B-17. SCI Control Register (SCR)

Application:

Date:

Programmer:

Sheet 1 of 2

SCI

SCI Control Register (SCR)

15 14 13 12 11 10

WOMS

WAKE SBK SSFTD WDS2 WDS1 WDS0

RWU

SCKP STIR TMIE

TIE

RIE

ILIE

SCI Shift Direction

0 = LSB First

1 = MSB First

Send Break

0 = Send break, then revert

1 = Continually send breaks

Receiver Wakeup Enable

0 = receiver has awakened

1 = Wakeup function enabled

Receiver Enable

0 = Receiver Disabled

1 = Receiver Enabled

Wired-Or Mode Select

1 = Multidrop

0 = Point to Point

Wakeup Mode Select

0 = Idle Line Wakeup

1 = Address Bit Wakeup

Word Select Bits

0 0 0 = 8-bit Synchronous Data (Shift Register Mode)

0 0 1 = Reserved

0 1 0 = 10-bit Asynchronous (1 Start, 8 Data, 1 Stop)

0 1 1 = Reserved

1 0 0 = 11-bit Asynchronous (1 Start, 8 Data, Even Parity, 1 Stop)

1 0 1 = 11-bit Asynchronous (1 Start, 8 Data, Odd Parity, 1 Stop)

1 1 0 = 11-bit Multidrop (1 Start, 8 Data, Data Type, 1 Stop)

1 1 1 = Reserved

Transmitter Enable

0 = Transmitter Disable

1 = Transmitter Enable

Transmit Interrupt Enable

0 = Transmit Interrupts Disabled

1 = Transmit Interrupts Enabled

Idle Line Interrupt Enable

0 = Idle Line Interrupt Disabled

1 = Idle Line Interrupt Enabled

Receive Interrupt Enable

SCI Clock Polarity

0 = Clock Polarity is Positive

1 = Clock Polarity is Negative

SCI Timer Interrupt Rate

0 = ÷ 32, 1 = ÷ 1

Timer Interrupt Enable

0 = Timer Interrupts Disabled

1 = Timer Interrupts Enabled

0 = Receive Interrupt Disabled

1 = Idle Line Interrupt Enabled

X:$FFFF9C Read/Write

REIE

SCI Receive Exception Inerrupt

0 = Receive Interrupt Disable

1 = Receive Interrupt Enable

= Reserved, Program as 0

Reset $000000

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