UM0934 datasheet(53/113 Pages) STMICROELECTRONICS

53 / 113 page

UM0934

Host interface

Doc ID 17389 Rev 2

53/113

5.3.12

CMD_DataRequest (51h)

This command exports the following services to the external host:

●

PHY mode: P_Data.Request

●

MAC mode: M_Data.Request.

This command is sent by the external host to request data transmission.

The request can be accepted or refused by the ST7570:

●

If accepted, the ST7570 performs a transmission starting on the next time-slot. A

positive CMD_DataConfirm (Section 5.3.13) is generated at the end of the

transmission

●

If refused, the modem generates an immediate negative CMD_DataConfirm

(Section 5.3.13).

Table 38.

CMD_DataIndication: IndicationData (MAC mode)

Byte index

Label

Description

CREDIT

Credit information

b7 – b5: Initial credit IC

b4 – b2: Current credit CC

b1 – b0: Delta credit DC

UART data transmission: LSBit first (from b0 to b7)

1..3

ADDRESS

b23 – b12: MAC source address

b11 – b0: MAC destination address

UART data transmission: MSByte first. Therefore, the 3 bytes are

transmitted following this order:

• From b16 to b23

• From b8 to b15

• From b0 to b7.

PAD

1 byte padding

5..246

M_SDU

MAC service data unit. (up to 242 bytes).

UART data transmission: MSByte first.

Table 39.

CMD_DataRequest: Syntax

Source

Command(Args)

Possible response

Ext. Host

CMD_DataRequest(RequestData)

CMD_DataConfirm(ConfirmData)

Table 40.

CMD_DataRequest: RequestData (PHY mode)

Byte index

Label

Description

0..37

P_SDU

Physical service data unit.

UM0934 Datasheet(PDF) 53 Page - STMicroelectronics

UM0934 Datasheet(HTML) 53 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Descarga

Enlace URL