Datasheet

NXP Semiconductors 29
10XS3435
Figure 12. Operating modes
7.2.1 Sleep mode
The 10XS3435 is in Sleep mode when:
•V
PWR
and V
DD
are within the normal voltage range,
• Wake-up = 0,
•Fail = X,
• Fault = X.
This is the Default mode of the device after first applying battery voltage (VPWR) prior to any I/O transitions. This is also the state of the
device when the WAKE and
RST and IN_ON[0:3] are logic [0]. In the Sleep mode, the output and all unused internal circuitry, such as the
internal regulator, are off to minimize draw current. In addition, all SPI-configurable features of the device are as if set to logic [0].
7.2.2 Normal mode
The 10XS3435 is in Normal mode when:
•V
PWR
and V
DD
are within the normal voltage range,
• Wake-up = 1,
• Fail = 0,
• Fault = 0.
Table 7. 10XS3435 operating modes
Mode wake-up fail fault Comments
Sleep 0 x x
Device is in Sleep mode. All outputs are OFF.
Normal 1 0 0
Device is currently in Normal mode. Watchdog is active if enabled.
Fail-Safe 1 1 0
Device is currently in Fail-safe mode due to Watchdog time-out or V
DD
Failure conditions. The output states are defined with the RFS resistor
connected to FSI.
Fault 1 X 1
Device is currently in fault mode. The faulted output(s) is (are) OFF. The safe
autoretry circuitry is active to turn-on again the output(s).
x = Don’t care.
Sleep
(fail = 0) and (wake-up = 1) and (fault = 0)
(wake-up = 0)
Fail-Safe
Normal
(wake-up = 0)
(fail = 1) and (wake-up = 1) and (fault = 0)
(fail = 0) and (wake-up = 1) and (fault = 0)
(wake-up = 1) and
(fail = 1)
and (fault = 0)
Fault
(wake-up = 0)
(wake-up = 1)
and (fault = 1)
(fail = 0) and
(wake-up = 1)
and (fault = 1)
(fail = 1) and
(wake-up = 1)
and (fault = 1)
(fail = 0) and
(wake-up = 1)
and (fault = 0)
(fail = 1) and
(wake-up = 1)
and (fault = 0)