Datasheet

Start-up configurations L6460
40/139 Doc ID 17713 Rev 1
8.2 Basic device mode
The basic device mode is selected by leaving the GPIO[0] pin floating. In this mode L6460
doesn’t use GPIO[3] and GPIO[4] as configuration pins, leaving them free for other uses.
When in this mode the regulators included in the start up sequence (except V
SWmain
) are
considered as system regulators and they start in the following sequence:
1. Auxiliary switching regulator1 (V
AUX1_SW
).
2. Auxiliary switching regulator2 (V
AUX2_SW
).
3. Main linear regulator (V
SWmain
).
4. Main switching regulator (V
SWmain
) (Not system regulator).
Table 9. Start-up correspondence
Pin state
(1)
1. “X” means “don’t care”.
Major mode Minor mode
(2)
2. The description of these modes is in the following Chapter 8.6
GPIO[0] GPIO[3] GPIO[4]
ZXXBasic
000
Single
Bridge
0 0 Z Primary regulator
001 Regulators
0 Z 0 Simple regulator
0 Z Z Bridge + VEXT
(3)
3. VEXT is the regulator output voltage obtained using the switching regulator controller with external FET.
0 Z 1 Secondary regulators
010
Master
Bridge
0 1 Z Primary regulator
011 Regulators
1 0 0 Simple regulator
1 0 Z Bridge + VEXT
(3)
1 0 1 Secondary regulators
1Z0
Slave
Bridge
1 Z Z Primary regulator
1 Z 1 Regulators
1 1 0 Simple regulator
1 1 Z Bridge + VEXT
(3)
1 1 1 Secondary regulators.