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STMicroelectronics FlexSPIN: SPI configurable stepper and DC multi motor driver evaluation board EVAL6460 EVAL6460 Data Sheet

Product codes
EVAL6460
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Page of 139
   
   
   
Start-up configurations
L6460 
42/139
 Doc ID 17713 Rev 1
8.6.2 
Primary regulator mode (KP)
In this configuration bridge 4 can be configured by firmware while bridge 3 is configured as 
two separate synchronous switching regulators. The last regulator in the sequence 
(V
AUX2_SW
) is not considered a system regulator.
When in this mode the power-up sequence is:
1.
Auxiliary switching regulator1 (V
AUX1_SW
).
2. Main 
switching regulator (V
SWmain
) together with main linear regulator (V
LINmain
).
3. 
Auxiliary switching regulator2 (V
AUX2_SW
) (Not system regulator).
8.6.3 Regulators 
mode
In this configuration bridge 4 can be configured by firmware while bridge 3 is configured as 
two separate synchronous switching regulators, but the start up sequence is different 
previous one.
When in this mode the power-up sequence is:
1.
Main switching regulator (V
SWmain
).
2. 
Auxiliary switching regulator1 (V
AUX1_SW
)
3. 
Auxiliary switching regulator2 (V
AUX2_SW
)
8.6.4 Simple 
regulator mode (KT)
Also in this configuration bridge 4 can be configured by firmware while bridge 3 is configured 
as two separate synchronous switching regulators. The last regulator in the sequence 
(V
SWmain
) is not considered a system regulator.
When in this mode the power-up sequence is:
1.
Auxiliary switching regulator1 (V
AUX1_SW
).
2. 
Auxiliary switching regulator2 (V
AUX2_SW
)
3. 
Main linear regulator (V
LINmain
)
4. Main 
switching regulator (V
SWmain
) (not system regulator).
8.6.5 Bridge 
+ 
V
EXT
 mode
In this configuration bridges 3 and 4 are not used as regulators and the regulator obtained 
using the switching regulator controller (V
SWDRV
) is included in start-up.
When in this mode the power-up sequence is:
1.
Main switching regulator (V
SWmain
).
2. Switching 
regulator 
controller regulator (V
SWDRV
).
3. 
Main linear regulator (V
LINmain
).