UM0934 datasheet(52/113 Pages) STMICROELECTRONICS

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Host interface

UM0934

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Doc ID 17389 Rev 2

5.3.11

CMD_DataIndication (50h)

This command exports the following services to the external host:

●

PHY mode: P_Data.Indication

●

MAC mode: M_Data.Indication.

This command is sent by the ST7570 to indicate the reception of data at PHY or MAC level,

according to the operating mode selected.

When operating in MAC mode and a frame with repetitions (i.e. with credits IC and CC > 0)

is received, the CMD_DataIndication is always notified upon receipt of the first valid MAC

frame within the repetition burst (Figure 19).

Figure 19.

Receipt of a MAC frame with repetitions (example with IC=3)

Table 35.

CMD_ReadDBError: ErrorData

Byte index

Label

Description

0ERROR

Error code:

11h: ERR_UNAVAILABLE_RESOURCE: the selected MIB object does not

exist or it does not exist for the current operating mode (MAC or PHY)

12h: ERR_REQUEST_NOT_ALLOWED: the writing request to an MIB object

failed

22h: ERR_ILLEGAL_DATA_COMMAND: the format or value of the request

data is not valid for the selected object

Table 36.

CMD_DataIndication: Syntax

Source

Command(Args)

Possible response

ST7570

CMD_DataIndication(IndicationData)

None

Table 37.

CMD_DataIndication: IndicationData (PHY mode)

Byte index

Label

Description

0..37

P_SDU

38 bytes containing the received data at the physical layer

(PHYsical service data unit)

38..39

ASK0

Number of bits equal to ‘0’ demodulated incrementing the ASK counter

(Section 3.6.2)

40..41

ASK1

Number of bits equal to ‘1’ demodulated incrementing the ASK counter

(Section 3.6.2)

42..43

FSK

Number of bits demodulated incrementing the SFSK counter (Section 3.6.2)

44..46

SNR0

Estimated signal-to-noise ratio on channel 0 (Section : Fine estimation)

47..49

SNR1

Estimated signal-to-noise ratio on channel 1 (Section : Fine estimation)

CMD_DataIndication(DA, SA, M_sdu, IC=3, CC=3, DC=0)

MAC Frame

(IC=3, CC=3)

MAC Frame

(IC=3, CC=2)

MAC Frame

(IC=3, CC=1)

MAC Frame

(IC=3, CC=0)

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