LC898240_16 Datasheet, PDF (10/23 Pages) ON Semiconductor – High Efficient Stepper Motor Controller

Main Chip Register
LC898240
Register Map
ADDR[6:0] Register Name Default
Function
R/W
0000h
AIFSEL
00h acceleration control interface configuration
R/W
0001h
START
00h start/stop acceleration control
R/W
0002h
WSEL
00h acceleration curve selection
R/W
0003h
INTP
00h interpolation setting between steps
R/W
0004h
DSKIP
00h skip setting at deceleration
R/W
0005h
SETST
00h wait time for acceleration
R/W
0006h
SETED
00h wait time for stop
R/W
0007h
STMODE
00h constant speed period programming mode selection
R/W
0008h
STCNTL
00h step counts for constant speed period (LSB)
R/W
0009h
STCNTH
00h step counts for constant speed period (MSB)
R/W
0010h
DPSTG
00h driver initial setting
R/W
0011h
DTSTG
00h driver active setting
R/W
0012h
GCKRTO
00h clock setting
R/W
0013h
GADSLIM
00h speed setting for high efficient mode
R/W
0014h
GPSTG
00h initial setting for High efficient mode
R/W
0015h
NMBUSTG
00h NM/BU setting
R/W
0016h
BDSTG
00h BD setting
R/W
0017h
SOSTG
00h step out detection setting
R/W
0018h
GADMAX
00h upper limit of VREFO level
R/W
0019h
GADSTOP
00h VREFO level setting at motor stop
R/W
001Ah
GADSTAT
00h FF value
R/W
001Bh
ADTDLT
00h AD increment value target
R/W
001Ch
ADTBSE
00h AD base value target
R/W
001Dh
ADTLIM
00h AD minimum value target
R/W
001Eh
ADMDRTO2
00h excitation mode ratio setting #2
R/W
001Fh
ADMDRTO3
00h excitation mode ratio setting #3
R/W
0020h
ADMDRTO4
00h excitation mode ratio setting #4
R/W
0021h
ADBURTO
00h burst up threshold
R/W
0022h
ADSTO
00h AD step out level
R/W
0023h
IPSTG
00h analog portion
R/W
0024h
STSSEL
00h status out setting
R/W
0025h
IFSEL
00h interface setting
R/W
0030h
STS
-
status
R
0031h
PHSCNT
-
phase
R
0032h
SPDCEF
-
speed coefficient
R
0033h
ADDAT_LT_ADJ
-
ADC judgement point voltage
R
0034h
GADDAT
-
VREFO coefficient
R
Register Function Description
AIFSEL: acceleration control interface configuration
(R/W)
Address Default
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
0000h
00h
-
-
-
-
-
-
-
AIFSEL = 0: I/O port control mode, using pins; START, WSEL3/2/1/0 and INTP1/0.
AIFSEL = 1: register control mode, using registers; START_REG, WSEL_REG and INTP_REG.
Bit0
AIFSEL
START: start/stop acceleration control (R/W)
Address Default
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
0001h
00h
-
-
-
-
-
-
-
It is effective during the register control mode (AIFSEL = 1).
Set START_REG from 0 to 1 during motor stop: start acceleration
Set START_REG from 1 to 0 during motor running in the constant speed: start deceleration
Bit0
START_REG
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