DSP56857 datasheet(315/662 Pages) FREESCALE

부품명	DSP56857

상세설명	Digitial Signal Controller

PDF	662 Pages

Scroll/Zoom	100%

제조업체	FREESCALE [Freescale Semiconductor, Inc]

홈페이지	http://www.freescale.com

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315 / 662 page

Functional Description

Enhanced Synchronous Serial Interface (ESSI), Rev. 4

Freescale Semiconductor

12-15

4. ESSI enabled (ESSIEN = 1)

5. Enable TXFIFO (TFEN = 1) and configure the Transmit Watermark (TFWM = n) if this

TXFIFO is used.

6. Write data to transmit data register (STX).

7. Enable transmit interrupts.

8. Set the TE bit (TE = 1) to enable the transmitter on the next frame sync boundary.

The transmitter timing for an 8-bit word with continuous clock, FIFO disabled, five words per

frame sync, in the Network mode is shown in Figure 12-4. The explanatory notes for the transmit

portion of the figure are provided in Table 12-8.

Figure 12-4. Network Mode Transmit Timing

TS 0

TS 1

TS 2

TS 3

TS 4

TS 0

Time Slot

SCK

Internal Word Clock

SC2

TFS Bit of SSR Register

TDE Status Bit / Interrupt

STX Register

STSR Register

TXSR Register

STD

Valid

Indefinite transition depends on SW interrupt processing

Invalid

DSP56857 데이터시트(PDF) 315 Page - Freescale Semiconductor, Inc