L7250
Table 2. Register map content description (continued)
Bit
SPI field name
Content
REGISTER DAR1, ADDRESS: 09H
[6:0]
[7]
Dac[14:8]
7 MSB for VCM dac
GainSwitch
0 = gain voltage of the VCM sense amplifier equal to 4.5 V/V
1 = gain voltage of the VCM sense amplifier equal to 16 V/V
REGISTER DAR2, ADDRESS: 0AH
[7:0] Dac[7:0]
REGISTER ADR, ADDRESS: 0BH
8 LSB for VCM dac
[7:0]
ADC_DATA[9:2]
8 MSB output data from ADC conversion
REGISTER ADR, ADDRESS: 0CH
[0]
ADCSTART
0-> 1 starts a new ADC conversion
[2:1]
ADC_CH_ADDR[1:0]
Channel whose conversion is required
00 = VCM current sense amplifier output
01 = VCM voltage amplifier output
10 = VCM BEMF
11 = Auxiliary Channel (external pin)
[3]
ADCrange
0 = the 4 signals enter directly (maintaining the proper dynamic
range) the ADC block
1 = the 4 signals are scaled down to the ADC dynamic range
[5:4]
ADC_RES_ADDR[1:0]
Channel whose result conversion is currently present in
ADC_DATA
REGISTER ADR, ADDRESS: 0DH
0DH [7:0]
reserved
REGISTER ADR, ADDRESS: 0EH
0EH [7:0]
reserved
REGISTER ADR, ADDRESS: 0FH
0FH [7:0]
Test[7:0]
Test register
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STMICROELECTRONICS [ ST ]
