L9679P datasheet(120/272 Pages) STMICROELECTRONICS

120 / 272 page

SPI interfaces

L9679P

120/272

DocID029275 Rev 1

1 Ibase tracking is enabled during blanking and disabled after start bits

recognition.

Idelta tracking is disabled during blanking and enabled after start bits

recognition

PERIOD_MEAS_DISABLE

0 Disabling of start bits period measure to decode following bits

0 Period is measured

1 Period is not measured (default is used)

FIX_THRESH

0 PSI5 selection of fixed or auto adaptive thresholds

0 auto adaptive threshold

1 fixed threshold (threshold is latched when this bit is set to high, we

recommend to set this bit before enabling of the interface)

TSxDIS

0 Time Slot Control Disable

0 Slot control enabled

1 Slot control disabled

BLKTxSEL

0 Blanking Time Selection

0 Blanking time = 5ms

1 Blanking time = 10ms

WSFILT[3:0] 0010 0010 0010 Wheel speed filter time selection

189k:

125k:

(16+x)*Tosc

(24+x)*Tosc

Tosc=1/16MHz

RSPTEN

0 Pass Through mode Enable

0 Off

1 On

AVG/SSDIS

0 Current average enable during message transmission

0 Off (base and delta work as configured with bits #12, 14, 15)

1 On: base is freezed during data message and during blanking time and delta

is averaged during message (fcut of the filter=2500 Hz) while is freezed during

blanking time.

L9679P Datasheet(PDF) 120 Page - STMicroelectronics