LC898240_16 Datasheet, PDF (12/23 Pages) ON Semiconductor – High Efficient Stepper Motor Controller

LC898240
STCNTL step counts for constant speed period (LSB)
(R/W)
Address Default
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0008h
00h
STCNT[7:0]
STCNTL step counts for constant speed period (MSB)
(R/W)
Address Default
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0009h
00h
-
-
-
-
-
-
-
STCNT[8]
The number of steps for the constant speed in STMODE = 1
STCNT must not be zero.
DPSTG driver initial setting (R/W)
Address Default
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0010h
00h
RSTIV RSTPHS RSTAD OERST OEIV
OEMV
MDSEL[1:0]
RSTIV
Polarity of RST signal.
RSTIV = 0: low active (reset by L)
RSTIV = 0: high active (reset by H)
RSTPHS
Synchronize with driver
RSTPHS = 0: reset at 315 degree
RSTPHS = 1: reset at 315 degree for full step excitation mode, reset at 0 degree for others
RSTAD
Reset phase adjustment
RSTAD = 0: no adjustment for bipolar driver
RSTAD = 1: adjustment enabled for unipolar driver
OERST
OE signal control
OERST = 0: no OE signal control. The pin OE is switched to input of OE signal during I/O port control mode
OERST = 1: activate OE single control. The pin OE is switched to output of OE signal. The pin ST is the OE signal
input
OEIV
OE signal polarity
OEIV = 0: high active
OEIV = 1: low active
OEMV
OEMV = 0: ignore step pulse while the output is disabled
OEMV = 1: advance phase with respect to the step pulse input even though the output is disabled
MDSEL[1:0]
MDSEL = 0h
MD = 0h: full step, both edges
MD = 1h: half step, both edges
MD = 2h: full step, rising edge
MD = 3h: half step, rising edge
MD = 4h: quarter step, both edges
MD = 5h: 1/8 step, both edges
MD = 6h: quarter step, rising edge
MD = 7h: 1/8 step, rising edge
Pin connection
LC898240 pin MD2 --- open
LC898240 pin MD1 --- STK672-6XXX pin MODE2
LC898240 pin MD0 --- STK672-6XXX pin MODE1
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