5.7.1 Current Sensing OpAmp Control Register

Name: CSCR
Offset: 0x0C
Reset: 0xE0
Property: R/W

Bit 76543210 
 CSA3ENCSA2ENCSA1ENReservedOFFSET [3:2]GAIN [1:0] 
Access R/WR/WR/WRR/WR/WR/WR/W 
Reset 11100000 

Bit 7 – CSA3EN

Enable Current Sense Amplifier 3 bit. The CSA is enabled when the device is in Standby/Normal mode and the corresponding enable bit is set to ‘1’. All current sense amplifiers will need a maximum of 20 μs to settle their output voltage after the enable signal is set to ‘1’.

Bit 6 – CSA2EN

Enable Current Sense Amplifier 2 bit. The CSA is enabled when the device is in Standby/Normal mode and the corresponding enable bit is set to ‘1’. All current sense amplifiers will need a maximum of 20 μs to settle their output voltage after the enable signal is set to ‘1’.

Bit 5 – CSA1EN

Enable Current Sense Amplifier 1 bit. The CSA is enabled when the device is in Standby/Normal mode and the corresponding enable bit is set to ‘1’. If current sense amplifier 1 (CSA1EN = ‘1’) is enabled and BEMFEN (in GDUCR1) is enabled, then both Back-EMF detection and current sense amplifier 1 will be disabled. All current sense amplifiers will need a maximum of 20 μs to settle their output voltage after the enable signal is set to ‘1’.

Bits 3:2 – OFFSET [3:2]

Current Sensing Amplifier Output Offset Set Point bits.
ValueDescription
‘2’b00’ VVIO/16
‘2’b01’ VVIO/8
‘2’b10’ VVIO/4
‘2’b11’ VVIO/2

Bits 1:0 – GAIN [1:0]

Current Sensing OpAmp Gain Set Point bits.
ValueDescription
‘2’b00’ 8
‘2’b01’ 16
‘2’b10’ 32
‘2’b11’ 64