LC898240_16 Datasheet, PDF (15/23 Pages) ON Semiconductor – High Efficient Stepper Motor Controller

LC898240
NMBUSTG
NM/BU setting (R/W)
Address Default
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0015h
00h
-
NMSEL
NMSTEP[1:0]
BUEN
BUSTEP[2:0]
NMSEL
VREFO adjust method
NMSEL = 0: constant type
NMSEL = 1: differential type
NMSTEP
VREFO adjust step
NMSEL = 0
NMSTEP = 0h: 1/256 of VREFO full scale voltage
NMSTEP = 1h: 2/256 of VREFO full scale voltage
NMSTEP = 2h: 4/256 of VREFO full scale voltage
NMSTEP = 3h: 8/256 of VREFO full scale voltage
NMSEL = 1
NMSTEP = 0h: (|target – judge point| / 32) × (1/256 of VREFO full scale voltage)
NMSTEP = 1h: (|target – judge point| / 16) × (1/256 of VREFO full scale voltage)
NMSTEP = 2h: (|target – judge point| / 8) × (1/256 of VREFO full scale voltage)
NMSTEP = 3h: (|target – judge point| / 4) × (1/256 of VREFO full scale voltage)
BUEN
BUEN = 0: burst up off
BUEN = 1: burst up on
BUSTEP
VREFO adjustment resolution at the bust up
BUSTEP = 0h: 2/256 of the VREFO full scale voltage
BUSTEP = 1h: 4/256 of the VREFO full scale voltage
BUSTEP = 2h: 8/256 of the VREFO full scale voltage
BUSTEP = 3h: 16/256 of the VREFO full scale voltage
BUSTEP = 4h: 32/256 of the VREFO full scale voltage
BUSTEP = 5h: 64/256 of the VREFO full scale voltage
BUSTEP = 6h: 128/256 of the VREFO full scale voltage
BUSTEP = 7h: 256/256 of the VREFO full scale voltage
BDSTG BD setting
(R/W)
Address Default
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0016h
00h
-
BDSEL
BDNUM[1:0]
BDEN
BDSTEP[2:0]
BDSEL
Burst down condition
BDSEL = 0: higher voltage than the judgement point
BDSEL = 1: ADCI waveform is convex.
BDNUM
The bust down condition qualifier: when the event consecutively repeated for the following number of times, this
function is activated.
BDNUM = 0h: twice
BDNUM = 0h: 4 times
BDNUM = 0h: 8 times
BDNUM = 0h: 16 times
BDEN
BDEN = 0: burst down deactivated
BDEN = 1: burst down activated
BDSTEP
VREFO adjustment resolution at the bust down
BDSTEP = 0h: 8/256 of the VREFO full scale voltage
BDSTEP = 1h: 12/256 of the VREFO full scale voltage
BDSTEP = 2h: 16/256 of the VREFO full scale voltage
BDSTEP = 3h: 24/256 of the VREFO full scale voltage
BDSTEP = 4h: 32/256 of the VREFO full scale voltage
BDSTEP = 5h: 48/256 of the VREFO full scale voltage
BDSTEP = 6h: 64/256 of the VREFO full scale voltage
BDSTEP = 7h: 96/256 of the VREFO full scale voltage
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