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DSP56857 Datasheet(PDF) 335 Page - Freescale Semiconductor, Inc

Part # DSP56857
Description  Digitial Signal Controller
PDF  662 Pages
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

DSP56857 Datasheet(HTML) 335 Page - Freescale Semiconductor, Inc

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Register Descriptions (ESSI0_BASE = $1FFE20, ESSI1_BASE = $1FFE00)
Enhanced Synchronous Serial Interface (ESSI), Rev. 4
Freescale Semiconductor
12-35
12.8.7.13 Transmit Frame Sync (TFS)—Bit 3
The middle section of Figure 12-21exhibits data written to the STX Register in the Network
mode during the time slot when the TFS bit is set. This is transmitted during either of the
following:
•
Second time slot (in the Network mode)
•
In the following first time slot (in the Normal mode)
While in Network mode, the TFS bit is set during transmission of the first slot of the frame. The
bit is then cleared when starting transmission of the next slot. The TFS bit is cleared by
Power-On Reset (POR) or ESSI reset (ESSIEN = 0).
12.8.7.14 Receive Frame Sync (RFS)—Bit 2
When set, this flag bit indicates a frame sync occurred during receiving of the next word into the
SRX Register. The process is illustrated in the lower portion of Figure 12-21. In the Network
mode, the RFS bit is set while the first slot of the frame is being received. It is cleared when the
next slot of the frame begins to be received. The RFS bit is cleared by Power-On Reset (POR) or
ESSI reset (ESSIEN = 0).



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