UM0932 datasheet(31/43 Pages) STMICROELECTRONICS

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UM0932

Host interface



If payload field is present, must be greater than or equal to 4



If payload field is not present, must be greater than or equal to 16.

Table 45. SS_DataRequest: RequestData

Byte index

Bit index

Label

Description and available values

Custom / MIB

frequency

Selection of frequency to use between MIB and custom frequency

0: TX frequency is the high or low frequency as in PHY_Config

(Section 4.2.2) MIB object.

1: TX frequency is specified in bytes [1

 3] (TX frequency).

Frequency

overwrite

Selection of PHY_Config MIB object overwrite (Section 4.2.2). This field

is taken into account if the Custom / MIB frequency bit is equal to “1” only.

0: TX frequency expressed in the following bytes (1 – 3) won't overwrite

the frequency in PHY_Config (Section 4.2.2) MIB object

1: TX frequency expressed in the following bytes (1 – 3) overwrites

frequency in PHY_Config (Section 4.2.2) MIB object

Frequency

set

Selection of frequency in PHY_Config MIB object

0: TX frequency is the LowFrequency in PHY_Config MIB object

1: TX frequency is the HighFrequency in PHY_Config MIB object

Gain selector

Selection of TX gain for frame transmission

0: TX gain set as in PHY Config MIB object (TX gain parameter

(Section 4.2.2)).

1: TX gain is specified in the following TX Gain byte (2 or 4).

4 – 6

Frame

modulation

Modulation of the frame to be transmitted

0: B-PSK

1: Q-PSK

2: 8-PSK

3: B-FSK

4: B-PSK coded

5: Q-PSK coded

6: Reserved

7: B-PSK coded with Peak Noise Avoidance

Zero crossing

synchronizati

0: Transmission frame starts on any instant

1: Transmission frame start after ZC delay value defined in PHY Config

MIB object (Table 54)

1 - 3

TX frequency

Frequency value (in Hz) that the output signal is modulated around, to be

expressed if “Custom / MIB frequency” bit is equal to “1” only.

4 (or 1)

0 – 4

TX gain

TX gain to be expressed if Gain Selector bit is equal to “1” only.

5 – 7

Unused

5 (or 2 or 4)

Header

length

Length of header field.

If payload is not empty, it must be: 4 = Header Length = Payload length <

226).

If payload is empty, it must be: 16 = Header Length < 226).

 231 (or

 228,

 230)

Header and

payload

Header and payload to be sent (from 0 to 226 byte: Header and Payload

to be sent as unique buffer).

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