参数资料
型号: L7250
厂商: STMICROELECTRONICS
元件分类: 运动控制电子
英文描述: VOICE COIL MOTOR CONTROLLER, PQFP64
封装: TQFP-64
文件页数: 36/46页
文件大小: 478K
代理商: L7250
41/46
L7250
4.5 Shock Sensor
This block takes input from a piezoelectric or charging mode shock sensor element (selectable using the SPI
bit ShockConf -> Reg02H, bit 7 ), and includes external filtering capability. A digital latched signal is available
on SkDout pin if the Sken bit (from SPI) is set to 1 otherwise the SkDout pin is transparent to the shock signal.
If the output signal has been latched, a pulse to zero of the Sken bit it is necessary to clear it.
The shock sensor element will be connected to the Skin and VREF25.
Figure 19. Piezoelectric Shock Sensor typical application block diagram (Reg02H->bit7=0)
Figure 20. Charging Shock Sensor typical application block diagram (Reg02H->bit7=1)
24 SkO ut
26
Sk F o u t
25 SkF in
V ref25+ V thH
V ref25-V thL
0
1
S
R
27
Sk D o u t
21
Vre f2 5
23
Sk in
R
9R
Vref25
S kE n (fro m S PI)
R1 e x t
C1 ex t
C2 ex t
R2 ex t
10M
24 SkO ut
26
S k F out
25 SkFin
V ref25+V thH
V ref25-V thL
0
1
S
R
27
S k D out
21
Vre f2 5
23
Sk in
Vref25
S kE n (from SP I)
R1 ex t
C1 ex t
C2 ex t
R2 e x t
Vref25
CSex t
RSex t
R
G
2
ext
R
G
1e
xt
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