UM0934 datasheet(48/113 Pages) STMICROELECTRONICS

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Host interface

UM0934

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Doc ID 17389 Rev 2

5.3.2

CMD_SynchroStatus (85h)

Only in PHY mode can the host retrieve the synchronization status at any time.

Where the SyncStatus parameter can be equal to the following values:

5.3.3

CMD_DesynchroRequest (11h)

This command exports the following services to the external host:

●

PHY mode: P_Sync.Request

●

MAC mode: M_Sync.Request.

This command is used by the external host to force the ST7570 to discard the current

synchronization.

The SyncData field returned by the CMD_SynchroIndication() is filled, as listed in

Section 5.3.1

, with SYNC parameter equal to 4 and CAUSE equal to 5.

Note:

In the case of MAC mode, this command has the same effect of setting the MIB object

00A0h (New synchronization, Section 6.5.29) to a high logic value, by using the

CMD_WriteDBRequest (Section 5.3.5) function.

Table 19.

CMD_SynchroStatus: Syntax

Source

Command(Data field)

Possible response

Ext. host

CMD_SynchroStatus(none)

CMD_SynchroStatus (SyncStatus)

Table 20.

CMD_SynchroStatus: SyncStatus (PHY mode)

Byte index

Label

Description

0STATUS

1: LP_SYNC_FOUND: Synchronization found (valid preamble + SSD

sequence detected)

2: LP_SYNC_LOSS: Synchronization lost or not found

Table 21.

CMD_DesynchroRequest: Syntax

Source

Command(Data field)

Possible response

Ext. host CMD_DesynchroRequest(Reset)

PHY mode: none

MAC mode: CMD_SynchroIndication(SyncData)

Table 22.

CMD_DesynchroRequest: Reset

Byte index

Label

Description

RESET 1: Rejects current synchronization

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