JAJSD42B February 2017 – December 2017 DRV8320 , DRV8320R , DRV8323 , DRV8323R
PRODUCTION DATA.
CSA制御レジスタをFigure 50に示し、説明をTable 18に示します。
レジスタ・アクセス・タイプ:読み取り/書き込み
このレジスタはDRV8323xファミリのデバイスにのみ存在します。
10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
CSA
_FET |
VREF
_DIV |
LS
_REF |
CSA
_GAIN |
DIS
_SEN |
CSA
_CAL_A |
CSA
_CAL_B |
CSA
_CAL_C |
SEN
_LVL |
||
R/W-0b | R/W-1b | R/W-0b | R/W-10b | R/W-0b | R/W-0b | R/W-0b | R/W-0b | R/W-11b |
Bit | Field | Type | Default | Description |
---|---|---|---|---|
10 | CSA_FET | R/W | 0b |
0b = Current sense amplifier positive input is SPx 1b = Current sense amplifier positive input is SHx (also automatically sets the LS_REF bit to 1) |
9 | VREF_DIV | R/W | 1b |
0b = Current sense amplifier reference voltage is VREF (unidirectional mode) 1b = Current sense amplifier reference voltage is VREF divided by 2 |
8 | LS_REF | R/W | 0b |
0b = VDS_OCP for the low-side MOSFET is measured across SHx to SPx 1b = VDS_OCP for the low-side MOSFET is measured across SHx to SNx |
7-6 | CSA_GAIN | R/W | 10b |
00b = 5-V/V current sense amplifier gain 01b = 10-V/V current sense amplifier gain 10b = 20-V/V current sense amplifier gain 11b = 40-V/V current sense amplifier gain |
5 | DIS_SEN | R/W | 0b |
0b = Sense overcurrent fault is enabled 1b = Sense overcurrent fault is disabled |
4 | CSA_CAL_A | R/W | 0b |
0b = Normal current sense amplifier A operation 1b = Short inputs to current sense amplifier A for offset calibration |
3 | CSA_CAL_B | R/W | 0b |
0b = Normal current sense amplifier B operation 1b = Short inputs to current sense amplifier B for offset calibration |
2 | CSA_CAL_C | R/W | 0b |
0b = Normal current sense amplifier C operation 1b = Short inputs to current sense amplifier C for offset calibration |
1-0 | SEN_LVL | R/W | 11b |
00b = Sense OCP 0.25 V 01b = Sense OCP 0.5 V 10b = Sense OCP 0.75 V 11b = Sense OCP 1 V |