DSP56303 datasheet(177/292 Pages) FREESCALE

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SCI Programming Model

DSP56303 User’s Manual, Rev. 2

Freescale Semiconductor

8-9

— SCI Transmit Data Address Register (STXA) in Figure 8-7

The SCI includes the GPIO functions described in Section 8.7, GPIO Signals and Registers, on

page 8-22. The next subsections describe the registers and their bits.

Figure 8-1. SCI Data Word Formats (SSFTD = 1), 1

Mode 0

8-bit Synchronous Data (Shift Register Mode)

(SSFTD = 1)

One Byte From Shift Register

Mode 2

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

(SSFTD = 1)

Start

Stop

Bit

Mode 4

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

(SSFTD = 1)

Start

Stop

Bit

Even

Parity

Mode 5

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

(SSFTD = 1)

Start

D0 or

Data

Type

Stop

Bit

Odd

Parity

Mode 6

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

(SSFTD = 1)

Start

Stop

Bit

Data

Type

WDS2 WDS1 WDS0

• Modes 1, 3, and 7 are reserved.

• D0 = LSB; D7 = MSB

• Data is transmitted and received LSB first if SSFTD = 0, or MSB first if SSFTD

= 1

0 = Data Byte

Data Type: 1 = Address Byte

D0 or

Data

Type

D0 or

Data

Type

WDS2 WDS1 WDS0

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