LC898240_16 Datasheet, PDF (17/23 Pages) ON Semiconductor – High Efficient Stepper Motor Controller

Code for target
255d
LC898240
ADTDLT
ADTBSE
ADTLIM
2000pps
Virtual step pulse speed
6000pps
ADMDRTO2
excitation mode ratio setting #2
(R/W)
Address Default
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
001Eh
00h
-
-
ADMDRTO2[5:0]
ADMDRTO2[5:0]
The target value ratio between half step and quarter step excitation mode
ratio = 2^−12[5] + 2^−22[4] + ⋯ + 2^−62[0]
ADMDRTO3
excitation mode ratio setting #3
(R/W)
Address Default
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
001Fh
00h
-
-
ADMDRTO3[5:0]
ADMDRTO3[5:0]
The target value ratio between half step and 1/8 step excitation mode
ratio = 2^−13[5] + 2^−23[4] + ⋯ + 2^−63[0]
ADMDRTO4
excitation mode ratio setting #4
(R/W)
Address Default
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0020h
00h
-
-
ADMDRTO4[5:0]
ADMDRTO4[5:0]
The target value ratio between half step and 1/16 step excitation mode
ratio = 2^−14[5] + 2^−24[4] + ⋯ + 2^−64[0]
ADBURTO
burst up threshold (R/W)
Address Default
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0021h
00h
-
-
ADBURTO[5:0]
ADBURTO[5:0]
The target value ration against the burst up threshold
ratio = 2^−1𝐴𝐴𝐴𝐴[5] + 2^−2𝐴𝐴𝐴𝐴[4] + ⋯ + 2^−6𝐴𝐴𝐴𝐴[0]
ADSTO AD step out level (R/W)
Address Default
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0022h
00h
ADSTO[7:0]
The code for tentative step out judgement
ADSTO[7:0]
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