LC898240_16 Datasheet, PDF (11/23 Pages) ON Semiconductor – High Efficient Stepper Motor Controller

LC898240
WSEL acceleration curve selection (R/W)
Address Default
Bit7
Bit6
Bit5
Bit4
0002h
00h
-
-
-
-
It is effective during the register control mode (AIFSEL = 1).
WSEL_REG[3:0] = 0h: the acceleration curve #0
WSEL_REG[3:0] = 1h: the acceleration curve #1
WSEL_REG[3:0] = 2h: the acceleration curve #2
WSEL_REG[3:0] = 3h: the acceleration curve #3
WSEL_REG[3:0] = 4h: the acceleration curve #4
WSEL_REG[3:0] = 5h: the acceleration curve #5
WSEL_REG[3:0] = 6h: the acceleration curve #6
WSEL_REG[3:0] = 7h: the acceleration curve #7
WSEL_REG[3:0] = 8h: the acceleration curve #8
WSEL_REG[3:0] = 9h - Fh: N.A.
Bit3
Bit2
Bit1
Bit0
WSEL_REG[3:0]
INTP interpolation setting between steps
(R/W)
Address Default
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
0003h
00h
-
-
-
-
-
-
It is effective during the register control mode (AIFSEL = 1).
INTP_REG[1:0] = 0h: not interpolation
INTP_REG[1:0] = 1h: interpolate 1 point between the steps based on E2PROM data
INTP_REG[1:0] = 2h: interpolate 3 point between the steps based on E2PROM data
INTP_REG[1:0] = 3h: interpolate 7 point between the steps based on E2PROM data
Bit1
Bit0
INTP_REG[1:0]
DSKIP skip setting at deceleration (R/W)
Address Default
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0004h
00h
-
-
-
-
-
-
DSKIP[1:0]
The number of skip of the acceleration curve data for deceleration
DSKIP = 0: no skip
DSKIP = 1: 1 point skip
DSKIP = 2: 2 points skip
DSKIP = 3: 3 points skip
SETST wait time for acceleration R/W
Address Default
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0005h
00h
Waiting time for acceleration
𝑇𝑇_{𝑊𝑊𝑊𝑊𝑊𝑊} = 𝑇𝑇_{𝐼𝐼} × 𝑆𝑆𝑆𝑆𝑆𝑆[7: 0]
Where,
𝑇𝑇_{𝑊𝑊𝑊𝑊𝑊𝑊}: waiting time [s]
𝑇𝑇_{𝐼𝐼}: initial acceleration pulse width [s]
SETST[7:0]
SETED wait time for stop R/W
Address Default
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0006h
00h
Waiting time for stop
𝑇𝑇_{𝑊𝑊𝑊𝑊𝑊𝑊} = 𝑇𝑇_{𝐼𝐼} × 𝑆𝑆𝑆𝑆𝑆𝑆[7: 0]
Where,
𝑇𝑇_{𝑊𝑊𝑊𝑊𝑊𝑊}: waiting time [s]
𝑇𝑇_{𝐼𝐼}: initial acceleration pulse width [s]
SETED[7:0]
STMODEconstant speed period programming mode selection (R/W)
Address Default
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0007h
00h
-
-
-
-
-
-
-
STMODE
STMODE = 0: continue rotation at the constant speed after the acceleration until START = 0
STMODE = 1: rotate at the constant speed after the acceleration for the number of steps which is set in the register
STCNT, followed by automatic deceleration and stop
START must be set 0 after the motor stops.
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