UM0934 Datasheet, PDF (51/113 Pages) STMicroelectronics – ST7570 S-FSK power line networking System-on-Chip

UM0934
Host interface
5.3.8
CMD_ReadDBRequest (90h)
This command is used by the external host to read the current value of an MIB object.
The ST7570 checks the parameters for validation:
● if valid, the request is accepted and the ST7570 returns the object value through a
CMD_ReadDBConfirm(Section 5.3.9)
● if the check is not valid, the request is rejected and the ST7570 replies with a
CMD_ReadDBError(Section 5.3.10).
Table 31. CMD_ReadDBRequest: Syntax
Source
Command(Args)
Possible response
Request accepted:
Ext. host CMD_ReadDBRequest (RequestData) ^{CMD_ReadDBConfirrm(RequestData)}
Error: CMD_ReadDBError(ErrorCode).
Table 32. CMD_ReadDBRequest: RequestData
Byte index Label
Description
0-1
Database entry index. Refer to MIB table for available objects.
INDEX
LSByte sent first, the MSByte is always set at 00h.
5.3.9
CMD_ReadDBConfirm (91h)
This command is sent by the ST7570 to acknowledge a CMD_ReadDBRequest() performed
by the external host, if the request has been accepted and executed without errors.
The ConfirmData field returned by this command has the same format and content of the
field RequestData (Table 27)of the CMD_WriteDBRequest().
Table 33. CMD_ReadDBConfirm: Syntax
Source
Command(Args)
ST7570
CMD_ReadDBConfirm(ConfirmData)
Possible response
None
5.3.10
CMD_ReadDBError (92h)
This command is sent by the ST7570 to notify that a CMD_ReadDBRequest() performed by
the external host has been rejected because of an invalid request data.
Table 34. CMD_ReadDBError: Syntax
Source
Command(Args)
ST7570
CMD_ReadDBError(ErrorData)
Possible response
None
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