FAH4840-269128 Datasheet, PDF (11/21 Pages) List of Unclassifed Manufacturers – FAH4840 Haptic Driver for Linear Resonant Actuators (LRAs)

Table 5.
Address:
Reset Value:
STATUS1
0x02
xxxx111x
Bit #
Name
Type
Function
7:4
Reserved
3
VDD_G
0: Input voltage is not good (less UVLO), Input voltage is less than 2.3 V
R ^{(rising), 2.1 V (falling)}
1: Input voltage is good (over UVLO)
2
VREG_OUT_
G
0: Regulator output is not good (VREG_OUT is less than 70% of VREG_OUT
R ^programmed)
1: Regulator output is good⁽³⁾
1
VOT
0: Over temperature protection is tripped
R
1: Over temperature protection is not tripped
0
Reserved
Note:
3. HEN must be HIGH for VREG_OUT to be enabled.
Table 6.
Address:
Reset Value:
CTRL_DIV1
0x03
01010011
Bit #
7:0
Name
PWM_DIV[7:0]
Type
R/W
Function
LSB of the PWM divisor. For example, if the intended resonance frequency is
175 Hz and the PWM input clock frequency is 40 kHz, program the
PWM[15:0] register as:
PWM_DIV[15:0] = (1/175)/(1/40 kHz) = 228(decimal) = E4(HEX)
PWM_DIV[15:8] = 00
PWM_DIV[7:0] = E4
Counter range is from 01 to E4.
Default is 83
Table 7.
Address:
Reset Value:
CTRL_DIV2
0x04
00000000
Bit #
7:0
Name
PWM_DIV[15:8]
Type
R/W
MSB of the PWM divisor.
Default is 0
Function
© 2013 Fairchild Semiconductor Corporation
FAH4840 • Rev. 1.0.0
11
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