Specifications

ManualsBrandsSilicon Laboratories ManualsComputer equipmentSi2415

AN93

Rev. 0.9 25

Table 13. EM In-band Commands and Statuses

Command /

Indicator pair

Hex Code Transmit Direction Receive Direction Supported in

Transparent

Submode

Supported in

Framed Submode

<t1> 0x5C Transmit one 0x19 byte Received one 0x19 byte Yes

Yes

<t2> 0x76 Transmit one 0x99 byte Received one 0x99 byte Yes

Yes

<t3> 0xA0 Transmit one 0x11 byte Received one 0x11 byte Yes

Yes

<t4> 0xA1 Transmit one 0x13 byte Received one 0x13 byte Yes

Yes

<t5> 0x5D Transmit two 0x19 bytes Received two 0x19 bytes Yes Yes

<t6> 0x77 Transmit two 0x99 bytes Received two 0x99 bytes Yes Yes

<t7> 0xA2 Transmit two 0x11 bytes Received two 0x11 bytes Yes Yes

<t8> 0xA3 Transmit two 0x13 bytes Received two 0x13 bytes Yes Yes

<t9> 0xA4 Transmit 0x19, 0x99 Received 0x19, 0x99 Yes Yes

<t10> 0xA5 Transmit 0x19, 0x11 Received 0x19, 0x11 Yes Yes

<t11> 0xA6 Transmit 0x19, 0x13 Received 0x19, 0x13 Yes Yes

<t12> 0xA7 Transmit 0x99, 0x19 Received 0x99, 0x19 Yes Yes

<t13> 0xA8 Transmit 0x99, 0x11 Received 0x99, 0x11 Yes Yes

<t14> 0xA9 Transmit 0x99, 0x13 Received 0x99, 0x13 Yes Yes

<t15> 0xAA Transmit 0x11,0x19 Received 0x11,0x19 Yes Yes

<t16> 0xAB Transmit 0x11,0x99 Received 0x11,0x99 Yes Yes

<t17> 0xAC Transmit 0x11,0x13 Received 0x11,0x13 Yes Yes

<t18> 0xAD Transmit 0x13,0x19 Received 0x13,0x19 Yes Yes

<t19> 0xAE Transmit 0x13,0x99 Received 0x13,0x99 Yes Yes

<t20> 0xAF Transmit 0x13,0x11 Received 0x13,0x11 Yes Yes

0xB0 Begin Transparent Mode Abort Detected in Framed Submode Yes Yes, Receive Only

<flag> 0xB1 Transmit a flag; enter Framed Submode if cur-

rently in Transparent Submode. If +ESA[E]=1,

append FCS to end of frame before sending

closing HDLC flag.

Detected a non-flag to flag transition. Preceding data was a valid

frame. If +ESA[E]=1, sent FCS matches that of the calculated

CRC.

Yes

<err> 0xB2 Transmit an Abort Detected a non-flag to flag transition. Preceding data is not a

valid frame.

Yes

<under> 0xB4 not applicable Detected Transmit Data Underrun Yes Yes

<tover> 0xB5 not applicable Detected Transmit Data Overrun Yes Yes

<rover> 0xB6 not applicable Detected Receive Data Overrun Yes Yes

<resume> 0xB7 Resume after a data underrun or overrun

(applicable if +ESA[C] = 1)

not applicable Yes

<bnum> 0xB8 not applicable <octnum0><octnum1> specifies number of octets in the transmit

data buffer if +ITF[C] is non-zero

Yes Yes

<unum> 0xB9 not applicable <octnum0><octnum1> specifies number of discarded octets fol-

lowing a data overrun/underrun, after the <resume> com-

mand. This is applicable if +ESA[C] = 1

<eot> 0xBA Terminate carrier, return to command mode. Loss of carrier detected, return to command mode Yes Yes

<ecs> 0xBB Escape to On-Line command mode Confirmation of Escape to On-Line command mode. Yes Yes

<rrn> 0xBC Request rate renegotiation Indicate rate renegotiation Yes Yes

<rate> 0xBE not supported Retrain/Rate Reneg completed, following octets <tx><rx> indi-

cate tx and rx rates.

Yes Yes

0x20 - 1200 bps

0x21 - 2400 bps

0x22 - 4800 bps

0x23 - 7200 bps

0x24 - 9600 bps

0x25 - 12 kbps

0x26 14.4 kbps

0x27 - 16.8 kbps

0x28 - 19.2 kbps

0x29 - 21.6 kbps

0x2A - 24 kbps

0x2B - 26.4 kbps

0x2C - 28.8 kbps

0x2D - 31.2 kbps

0x2E - 33.6 kbps

Notes:

1. U87[10] = 1 Can be used to limit the transparency characters in the receive direction, to these four cases only.

2. The actual value represented in <octnum0><octnum1> = (octnum0 / 2) + (octunum1 x 64)

3. <0x45> indicates that an unrecognized command was sent to the modem.