LV8731V 查看數據表（PDF） - SANYO -> Panasonic
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LV8731V Datasheet PDF : 26 Pages
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LV8731V
Description of operation
Input Pin Function
(1) Chip enable function
This IC is switched between standby and operating mode by setting the ST pin. In standby mode, the IC is set to
power-save mode and all logic is reset. In addition, the internal regulator circuit and charge pump circuit do not
operate in standby mode.
ST
Mode
Internal regulator
Charge pump
Low or Open
Standby mode
Standby
Standby
High
Operating mode
Operating
Operating
(2) Drive mode switching pin function
The IC drive mode is switched by setting the DM pin. In STM mode, stepping motor channel 1 can be controlled by
the CLK-IN input. In DCM mode, DC motor channel 2 or stepping motor channel 1 can be controlled by parallel
input. Stepping motor control using parallel input is 2-phase or 1-2 phase full torque.
DM
Drive mode
Application
Low or Open
STM mode
Stepping motor channel 1 (CLK-IN)
High
DCM mode
DC motor channel 2 or stepping motor channel 1 (parallel)
STM mode (DM = Low or Open)
(1) STEP pin function
Input
ST
STP
Low
*
High
High
Operating mode
Standby mode
Excitation step proceeds
Excitation step is kept
(2) Excitation mode setting function
MD1
MD2
Excitation mode
Initial position
Channel 1
Channel 2
Low
Low
2 phase excitation
100%
-100%
High
Low
1-2 phase excitation
100%
0%
Low
High
W1-2 phase excitation
100%
0%
High
High
4W1-2 phase excitation
100%
0%
This is the initial position of each excitation mode in the initial state after power-on and when the counter is reset.
(3) Position detection monitoring function
The MONI position detection monitoring pin is of an open drian type.
When the excitation position is in the initial position, the MONI output is placed in the ON state.
(Refer to "Examples of current waveforms in each of the excitation modes.")
No.A1482-10/26
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