LV8042LG Datasheet, PDF (12/29 Pages) Sanyo Semicon Device – Bi-CMOS IC For Digital Still Cameras 7-Channel Single-Chip Motor Driver ICs

LV8042LG
Stepping Motor Driver (1ch/2ch)
CLK Function
Input
ST
CLK12
L
*
Operation mode
Standby mode
H
Excitation step feed
H
Excitation step hold
Charge pump circuit
Stop
Operating
1ch ⋅ 2ch (STP) Status Setting Serial Data: (D1, D0=0, 1)
D7 (OE)
D6 (RST)
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
0
*
1
0
*
1
*
*: Don’t Care
D5 (HOLD)
*
*
*
*
*
*
0
1
*
*
*
*
D4 (MS2)
*
*
0
0
1
1
*
*
*
*
*
*
D3 (MS1)
*
*
0
1
0
1
*
*
*
*
*
*
D2 (F/R)
0
1
*
*
*
*
*
*
*
*
*
*
Operation mode
CW (forward)
CCW (reverse)
2 phase excitation drive
1-2 phases full torque excitation drive
1-2 phases excitation drive
4W1-2 phases excitation drive
Step hold cancel
Step hold
Counter reset (Excitation at initial position)
Counter reset cancel
Output high impedance
Output operation state
1ch ⋅ 2ch Reference Voltage Setting Serial Data: (D1, D0=0, 0)
D3 (VSEN1_SELECT2)
D2 (VSEN1_SELECT1)
Current setting reference voltage (at 100%)
0
0
0.2V
0
1
0.134V
1
0
0.1V
1
1
0.066V
The reference voltage to set the output current can be changed over in four stages by the serial data.
This is effective for power saving during hold power application of the motor.
Set Current Calculation Method
IOUT = (reference voltage × set current ratio) /SEN resistance
As the reference voltage is variable (0.2V, 0.134V, 0.1V, 0.066V) by the serial data, the output current can be set
from the reference voltage and SEN resistance.
(Example) The output current as shown below flows when the reference voltage is 0.2V, the set current ratio is 100%,
and the SEN resistance is 1Ω.
IOUT = 0.2V × 100%/1Ω = 200mA
No.A0004-12/29