UM0934 datasheet(88/113 Pages) STMICROELECTRONICS

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Management information base (MIB)

UM0934

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Doc ID 17389 Rev 2

6.5.32

00ABh (Max PGA Gain)

This object stores the Maximum Value Gain to limit the PGA control block amplification.

The confirm message of a CMD_ReadDBRequest will return the current value without

changing it. The CMD_WriteDBRequest will set the value and the confirm message will

return it.

Read/write confirm data format:

The same as request.

6.5.33

00ACh (soft start)

This object stores the time value to reach the fixed output gain during a frame.

The value stored in the MIB object has to be multiplied by a constant interval equal to 13 µs

to calculate the “soft start” duration.

The confirm message of a CMD_ReadDBRequest returns the current value without

changing it. The CMD_WriteDBRequest sets the corresponding time value and the confirm

message returns it.

Read/write confirm data format:

The same as request.

Table 141.

MIB object 000Ch: Write request data format

Byte

Label

Description

Available range

Factory default

0..1

GAIN

Maximum PGA gain

0000h .. 0008h

0008h

2..3

PAD

Padding bytes

0000h

Table 142.

MIB object 0005h: Write error data format

Byte

Returned value

Error description

ERR_ILLEGAL_DATA_COMMAND

Wrong number of data bytes

Table 143.

MIB object 00ACh: Write request data format

Byte

Label

Description

Available range

Factory default

0..2

Soft Start

b0..19: 13 µs delay steps

000000h .. 0FFFFFh

000000h

b20..23: unused

---

Table 144.

MIB object 00ACh: Write error data format

Byte

Returned value

Error description

ERR_ILLEGAL_DATA_COMMAND

Wrong number of data bytes

ERR_REQUEST_NOT_ALLOWED

The writing request failed

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