Datasheet

L6460 Supervisory system
Doc ID 17713 Rev 1 33/139
state. This stretch time can be selected by setting the ID[1:0] bits in the SampleID register
according to following table.
When nRST_int becomes active (logic level = “0”) it sets in their reset state some of the
functions inside L6460. The main functions that will be reset by nRST_int signal are the
following:
– Serial interface will be reset and will not accept any other command.
– The bridges 1 and 2 will place their outputs in high impedance and PWM and
direction signals will be reset.
– AD converter will be powered off.
– GPIOs will be powered off.
– Current DAC will be powered off.
– Operational amplifiers will be powered off.
– Watchdog count will be reset (while Watchdog flags won’t be reset).
– Interrupt controller will be powered off.
– Digital comparator will be powered off.
Additionally the system regulators will be powered off but only if the voltage that caused the
nRST_int event is checked before the system regulator in the power up sequence. This
means that:
– all system regulators will be powered off if nRST_int is caused by V
Supply
,
V
SupplyInt
, V
Pump
(and also if V3v3 causes a POR);
– no one of the system regulators will be powered off if nRST_int is caused by
V
GPIO_SPI
;
– only the system regulators that follows the system regulator that caused the
nRST_int in power up sequence will be powered off.
Table 6. Stretch time selection
ID[1] ID[0]
Selected stretch time
Note
Typ
0 0 16ms Default state
0132ms
1048ms
1164ms