Silicon Laboratories Si2415 Spécifications télécharger pdf (Page 28)

Si2457/34/15/04

28 Rev. 1.3

+IFC Options

+IFC = A

+IFC = A,B

Specifies the flow control to be implemented.

A Specifies the flow control method used by the host to control data from the modem

0None

1 Local XON/OFF flow control. Does not pass XON/XOFF character to the remote

modem.

2 Hardware flow control (RTS)

B Specifies the flow control method used by the modem to control data from the host

0 None

1 Local XON/OFF flow control.

2 Hardware flow control (CTS).

+ITF Options

+ITF = A

+ITF = A,B

+ITF = A,B,C

Transmit flow control threshold.

A Threshold above which the modem will generate a flow off signal

<0 to 511> bytes

B Threshold below which the modem will generate a flow on signal

<0 to 511> bytes

C Polling interval for <EM><BNUM> indicator

0 to 300 in 10 msec units.

+MR = X

Modulation reporting control.

Mode

0 Disabled

1 Enabled

If enabled, the intermediate result code is transmitted at the point during connect negotiation.

The format of this result code is as follows:

+MCR: <carrier> e.g. +MCR: V32B

+MRR: <rate> e.g. +MRR: 14400

+MS Options

+MS = A

+MS = A,B

+MS = A,B,C

+MS = A,B,C,D

+MS = A,B,C,D,E

+MS = A,B,C,D,E,F

Modulation Selection.

A Preferred modem carrier

V21 ITU-T V.21

V22 ITU-T V.22

V22B ITU-T V.22bis (default for Si2404)

V32 ITU-T V.32

V32B ITU-T V.32bis (default for Si2415)

V34 ITU-T V.34 (default for Si2434)

V90 ITU-T V.90 (default for Si2457)

B Automatic modulation negotiation

0 Disabled

1 Enabled

C,D Min TX rate/Max TX rate are optional numeric values that specify the lowest value

at which the DCE may establish a connection. If unspecified (set to 0), they are

determined by the carrier and automode settings.

E,F Min RX rate/Max RX rate are optional numeric values which specify the highest

value at which the DCE may establish a connection. If unspecified (set to 0), they

are determined by the carrier and automode settings.

Table 8. Basic AT Command Set (Command Defaults in Bold) (Continued)

Command Action

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 59 60

Si2457/34/15/04 1

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