UM0932 datasheet(35/43 Pages) STMICROELECTRONICS

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UM0932

Management information base (MIB)

4.2

MIB parameters

In this section all the MIB object is described in detail.

4.2.1

00h (Modem configuration)

This object stores the setting used to functionally configure the modem. It can be read or

written.

4.2.2

01h (PHY layer configuration)

This object stores the settings used to configure the modem at physical layer. It can be read

or written.

Table 53. MIB object 00h: MIB_WriteRequest and MIB_ReadRequest data format

Byte

index

Bit

index

Label

Description and available values

Factory default value

0 – 1

Access mode

Active layer for received frames

0: PHY layer

1: DL layer

2: SS layer

1 (DL layer)

Sniffer mode

Sniffer feature on received frames (active on DL and

SS layer only)

0: not active

1: active

0 (not active)

3 - 4

CRC length

CRC length on DL frames

0: 1 byte (CRC-8)

1: 2 byte (CRC-16), big endian

2: 4 byte (CRC-32), little endian

3: 4 byte (CRC-32), big endian

Reserved

Always equal to 0

DL CRC on

PHY length

Fields of DL frame (Figure 3) involved in CRC

calculation active on handled DL and SS frames only)

0: CRC calculated over DL payload only

1: CRC calculated over DL payload and PHY length

Unused

Unused value

Table 54. MIB object 01h: MIB_WriteRequest and MIB_ReadRequest data format

Byte

index

Bit

index

Label

Description and available values

Factory default value

 2

High frequency

High frequency used for communication [Hz]. Any

value in CENELEC band A, B, C, D.

86000 (014FF0h)

 5

Low frequency

Low frequency used for communication [Hz]. Any

value in CENELEC band A, B, C, D.

72000 (011940h)

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