ML7406 Datasheet, PDF (35/104 Pages) List of Unclassifed Manufacturers – 868MHz SRD RF transceiver IC

FEDL7406-02
ML7406
Length of SyncWord pattern can be defined by SYNC_WORD_LEN[5:0] ([SYNC_WORD_LEN: B1 0x25(5-0)]). In this case,
SyncWord pattern defined by the length from low bit of SYNC_WORD1[31:0] or SYNC_WORD2[31:0] will be the pattern for
checking.
Example) SyncWord length
If the following registers are set, 18 bit of SYNC_WORD1[17:0] or SYNC_WORD2[17:0] will be reference pattern
for the SyncWord detection. Higher bits (bit31-18) are not checked.
[SYNC_WORD_LEN: B1 0x25]=0x12
[SYNC_WORD_EN: B1 0x26]=0x0F
32bit SyncWord pattern can be controlled by enabling/disabling by each 8bit, when receiving SyncWord. The following table
describes enable/disable control and SyncWord pattern.
[SYNC_WORD_EN]
(B1 0x26)
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
SYNC_WORD*
[31:24] [23:16] [15:8] [7:0]
D.C.(*1)
ON
D.C.
ON
D.C.
D.C.
ON
ON
D.C.
ON
D.C.
D.C.
ON
D.C.
ON
D.C.
ON
ON
D.C.
D.C.
ON
ON
ON
ON
D.C.
ON
D.C.
ON
ON
D.C.
ON
D.C.
ON
D.C.
ON
ON
ON
ON
D.C.
ON
ON
D.C.
ON
ON
ON
ON
D.C.
ON
ON
ON
ON
SyncWord detection operation
No SyncWord detection
Only [7:0] are valid.
Upon [7:0] detection, SyncWord detection.
Only [15:8] are valid.
Upon [7:0] detection, SyncWord detection.
[15:0] are valid.
Upon [7:0] detection, SyncWord detection.
Only [23:16] are valid.
Upon [7:0] detection, SyncWord detection.
[23:16] and [7:0] are valid.
Upon [7:0] detection, SyncWord detection.
[23:8] are valid.
Upon [7:0] detection, SyncWord detection.
[23:0] are valid.
Upon [7:0] detection, SyncWord detection.
Only [31:24] are valid.
Upon [7:0] detection, SyncWord detection.
[31:24] and [7:0] are valid.
Upon [7:0] detection, SyncWord detection.
[31:24] and [15:8] are valid.
Upon [7:0] detection, SyncWord detection.
[31:24] and [15:0] are valid.
Upon [7:0] detection, SyncWord detection.
[31:16] are valid.
Upon [7:0] detection, SyncWord detection.
[31:16] and [7:0] are valid.
Upon [7:0] detection, SyncWord detection.
[31:8] are valid.
Upon [7:0] detection, SyncWord detection.
Whole [31:0] are valid.
Upon [7:0] detection, SyncWord detection.
*1 D.C. stands for Don’t Care.
*2 Preamble pattern can be added to the SyncWord detection conditions by RXPR_LEN[5:0]([SYNC_CONDITION1: B0
0x45(5-0)]).
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