TPIC8101_05 Datasheet, PDF (14/20 Pages) Texas Instruments – KNOCK SENSOR INTERFACE

TPIC8101
KNOCK SENSOR INTERFACE
SLIS110A − APRIL 2003 − REVISED MAY 2005
PRINCIPLES OF OPERATION
Table 3. Advanced SPI Mode
NO.
CODE
1 010 D[4:0]
COMMAND (t)
Set the prescaler and SDO status
2 1110 000 D[0] Select the channel
DATA
OSCIN frequency
D[4:1]=0000=> 4 MHz
D[4:1]=0001=> 5 MHz
D[4:1]=0010=> 6 MHz
D[4:1]=0011=> 8 MHz
D[4:1]=0100=> 10 MHz
D[4:1]=0101=> 12 MHz
D[4:1]=0110=> 16 MHz
D[4:1]=0111=> 20 MHz
D[4:1]=1000=> 24 MHz
D[0]=0 => SDO active
D[1]=1=> SDO high impedance
D[0]=0 => Channel 1 selected
D[1]=1=> Channel 2 selected
3 00 D[5:0]
4 10 D[5:0]
Set the band-pass center
frequency
Set the gain
D[5:0] (see Table 1)
D[5:0] (see Table 1)
5 110 D[4:0]
Set the integration time constant D[4:0] (see Table 1)
6 0111 0001
Set SPI configuration to the
advanced mode
None
RESPONSE (t)
Byte 1 (D7 to D0) of the digital
integrator output
D9 to D8 of digital integrator
output followed by six zeros
Byte 1 (MSB) of the 00000001
Byte 2 (LSB) 11100000
SPI configuration
(MSB)01110001(LSB)
Inverted SPI configuration
(MSB)10001110(LSB)
digital data output from the TPIC8101
digital output
D Digital integrator output (10 bits, D[9:0])
D First response byte (MSB): 8 bits for D7 to D0 of the integrator output
D Second response byte (LSB): 2 bits for D9 to D8 of the integrator output followed by six zeros
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