
LV8042LG
No.A0004-10/29
Serial Data Input Specification
Register (D1, D0): Selection of Data Transmission Destination
D1
D0
Mode
0
STP reference voltage setting/Monitor output setting/3ch
4ch drive mode setting
0
1
1ch
2ch (STP) setting
1
0
3ch
4ch (PWM/STP) setting
1
5ch
6ch(PWM) setting /7ch (constant current) reference voltage setting
Setting (D1, D0) of serial data as shown in the table above enables selection of the register for status setting of each
motor driver.
STP Reference Voltage Setting/Monitor Output Setting/3ch
4ch Drive Mode Setting
Register No.
Data
Nomenclature
Functions
D0
0
RG_SELECT 1
Register select 1
D1
0
RG_SELECT 2
Register select 2
D2
0 or1
VSEN1_SELECT 1
1ch
2ch reference voltage select 1
D3
0 or 1
VSEN1_SELECT 2
1ch
2ch reference voltage select 2
D4
0 or 1
VSEN2_SELECT 1
3ch
4ch reference voltage select 1
D5
0 or 1
VSEN2_SELECT 2
3ch
4ch reference voltage select 2
D6
0 or 1
MO_SELECT
Monitor output channel select
D7
0 or 1
PWM/MICRO
3ch
4ch drive mode setting
1ch
2ch (STP) Setting
Register No.
Data
Nomenclature
Functions
Channel
D0
1
RG_SELECT 1
Register select 1
D1
0
RG_SELECT 2
Register select 2
D2
0 or 1
F/R 1
Forward/reverse setting
D3
0 or 1
MS 11
Micro-step select 1
D4
0 or 1
MS 12
Micro-step select 2
D5
0 or 1
HOLD 1
Step hold setting
D6
0 or 1
RESET 1
Logic reset
D7
0 or 1
OUT ENABLE 1
Output enable
1ch/2ch
(STP)
3ch
4ch (PWM/STP) Setting
Nomenclature
Functions
3ch
4ch drive setting (D7)
Register No
Data
“0”
“1”
PWM mode
STP mode
Channel
D0
0
RG_SELECT 1
Register select 1
D1
1
RG_SELECT 2
Register select 2
D2
0 or 1
F/R 3
F/R 2
Forward/reverse setting
D3
0 or 1
DECAY 3
MS 21
Current attenuation mode setting
Micro-step select 1
3ch
PWM
D4
0 or 1
F/R 4
MS 22
Forward/reverse setting
Micro-step select 2
D5
0 or 1
DECAY 4
HOLD 2
Current attenuation mode setting
Step hold setting
4ch
PWM
D6
0 or 1
(DUMMY)
RESET 2
(Dummy data)
Logic reset
D7
0 or 1
(DUMMY)
OUT ENABLE 2
(Dummy data)
Output enable
3ch/4ch
(STP)