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參數(shù)資料
| 型號： | TPIC8101DWR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO20 |
| 封裝： | PLASTIC, SOIC-20 |
| 文件頁數(shù)： | 4/23頁 |
| 文件大?。?/td> | 511K |
| 代理商： | TPIC8101DWR |
TPIC8101
KNOCK SENSOR INTERFACE
SLIS110A APRIL 2003 REVISED MAY 2005
12
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
system transfer equation
The output voltage may be derived from:
V
O +
V
IN
A
IN
A
P
A
BP
A
INT
t
INT
t
C
A
O )
V
RESET
where:
VIN = Input voltage peak (amplitude)
VO = Output voltage
AIN = Input amplifier gain setting
AP = Programmable gain setting
ABP = Gain of band-pass filter
AINT = Gain of integrator
tINT = Integration time from 0.5 ms to 10 ms
AO = Output buffer gain
τC = Programmable integrator time constant
VRESET = Reset voltage from which the integration operation starts
If ABP = AINT = 2 and AIN = AO = 1,
then
V
O +
V
IN
A
P
8
P
t
INT
t
C
) V
RESET
programming in normal mode (TEST = 1)
To enable programming in the normal mode, the TEST terminal must be high. Communication is through the
SPI and the CS terminal is used to enable the IC. The information on the SDI line consists of two parts: address
and data.
After power up, the SPI is in default mode (see Table 2).
default SPI mode
The SPI is in the default mode on the power up sequence. In this case, the SDO directly equals the SDI (echo
function). In this mode, five commands can be transmitted by the master controller to configure the IC (see
Table 2).
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