L99DZ120
4.3.5 Interrupt
Figure 23. NINT pins
9 (6'SURW
Application information
'DWD,Q
(QDEOH
'LJLWDO
ORJLF
'DWD2XW
*1' *1'
("1($'5
RxDL/NINT indicates:
a wake-up event from V1_standby mode and the programmable timer interrupt
RxDL/NINT pin is pulled low for t = t interrupt
.
NINT indicates:
In Active mode:
V
SREG
dropped below the programmed early warning threshold in Control Register 3
(V
SREG
< VSREG_EW_TH); feature is deactivated if VSREG_EW_TH is set to 0 V.
In V1_standby mode
– Programmable timer interrupt; An NINT pulse is generated at the beginning of the timer on-time (Timer 1 or Timer2)
– Wake-up from V1_standby mode by any wake-up source
NINT is pulled low for t = t interrupt
In case of increasing V1 load current during V1_standby mode (I
V1
> I cmp_ris
), the device remains in standby mode and the watchdog starts with a Long Open Window. No Interrupt signal is generated.
4.4
The transition from Active mode to Vbat_standby mode is initiated by an SPI command. In
Vbat_standby mode, the voltage regulators V1 and V2 (depending on configuration in
CR 1), the power outputs (except OUT15 and OUT_HS) as well as LIN transmitter are switched off.
An NReset pulse is generated upon wake-up from Vbat_standby mode.
Wake-up from Standby modes
A wake-up from standby mode will switch the device to Active mode. This can be initiated by one or more of the following events:
DS11567 Rev 5
63/161
160
