LC898240_16 Datasheet, PDF (18/23 Pages) ON Semiconductor – High Efficient Stepper Motor Controller

LC898240
IPSTG analog portion (R/W)
Address Default
Bit7
Bit6
0023h
00h
-
-
ADCWDT[2:0]
Analog characteristics setting
It must be 2.
AMPGN[2:0]
Gain of the amplifier for AMPO output
AMPGN = 0h: 1x
AMPGN = 1h: 2x
AMPGN = 2h: 4x
AMPGN = 3h: 8x
AMPGN = 4h: 16x
AMPGN = 5h to 7h: inhibited
Bit5
Bit4
Bit3
ADCWDT[2:0]
Bit2
Bit1
Bit0
AMPGN[2:0]
STSSEL status out setting (R/W)
Address Default
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0024h
00h
STS1SEL[3:0]
STS0SEL[3:0]
STS1SEL[3:0]
Status signal selection for the pin STS1
STS0SEL[3:0]
Status signal selection for the spin STS0
The spins STS1 and STS0 get H during E2PROM down load, after the reset by RSB is released.
STS1SEL = 0h: L
STS1SEL = 1h: RDY
STS1SEL = 2h: MACT
STS1SEL = 3h: ACB
STS1SEL = 4h: MONI (driver home position)
STS1SEL = 5h: STPOUT (step out detected)
STS1SEL = 6h: GAD_EN (high efficient mode)
STS1SEL = 7h: ADJ_EN (VREF adjusted)
STS1SEL = Ah: BSTDWN (bust down)
STS1SEL = Bh: BSTUP (burst up)
STS1SEL = Ch to Fh: not allowed
IFSEL interface setting (R/W)
Address Default
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0025h
00h
-
-
-
-
-
-
STPSEL IFSEL
STPSEL
Step pulse source selection
STPSEL = 0: input from external through the pin START
STPSEL = 1: acceleration control mode. The step pulse is generated by the acceleration controller. The pin START
is used for acceleration start (START = H) and deceleration start (START = L)
IFSEL
Control mode selection
IFSEL = 0: IO port control mode
Input pins: ST, FR, MD2, MD1, MD0, and either OE (OERST = 0) or ST (OERST = 1, OE output)
Registers ST_REG, RST_REG, OE_REG, FR_REG and MD_REG are ignored.
IFSEL = 1: register control mode
Outputs ST, FR, MD2, MD1, MD0, OE and RSTO are driven by ST_REG, FR_REG, MD_REG,
OE_REG and RST_REG.
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