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Direct Sequence Spread Spectrum Baseband Modem (SSTM)
52
PRELIMINARY V1.8
CI_l[5]
ACC1RES. DPLL Accumulator 1 reset. See Application Section.
CI_l[7:6]
WSL. Sets the width of the “Detection Window”. CI_l[6] is LSB,
CI_l[7] is MSB. See Application Section.
CI_h[0]
M/SB. Set the SSTM to be a Master (HI) or Slave (LO). Note: must
be set to LO in half-duplex data mode.
CI_h[3:1]
T. Number of errors allowed in the UW. CI_h[1]is LSB, CI_h[3] is
MSB.
CI_h[4]
LockSMon. Enables the Locking State Machine when set to HI (see
Figure 14. for Locking State Machine state diagram).
12.15. RF/IF Analog Interface
The SSTM interfaces with the RF/IF analog radio through the following pins: DI,
MODOUT, PLLSW, and RFPWR.
ACC1RE
S
Accumulator1 Reset
0
ACC1 NOT reset.
1
Reset ACC1.
WSL
Width of Detection Window
0
4 samples wide
1
6 samples wide
2
8 samples wide
310 samples wide
T
Allowable UW Errors
00 bit
11 bit
2
2 bits
3
3 bits
4-7
4 bits
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