L99PM60J datasheet(12/75 Pages) STMICROELECTRONICS

12 / 75 page

Detailed description

L99PM60J

12/75

Doc ID 18309 Rev 6

2.2.2

Flash mode

To program the system microcontroller, the L99PM60J can be operated in Flash Mode

where the internal watchdog is disabled. In addition the SPI-Interface and low power modes

are not available in Flash Mode.

The mode can be entered if the following condition is applied

VCSN > VFlash

At exit from Flash Mode (VCSN < Vflash) no NReset pulse is generated and the watchdog

starts with a Long Open Window.

Note:

“High” level for flash mode selection is VCSN > Vflash. For all other operation modes,

standard 5V logic signals are required.

2.2.3

V1-standby mode

The transition from Active Mode to V1-standby mode is controlled by SPI.

To supply the micro controller in a low power mode, the voltage regulator 1 (V1) remains

active. In order to reduce the current consumption, the regulator goes in low current mode

as soon as the supply current of the microcontroller goes below the ICMP current threshold.

At this transition, the L99PM60J also deactivates the internal watchdog.

Relay outputs and LIN Transmitter are switched off in V1-standby Mode. High side Outputs

remain in the configuration programmed prior to the standby command.

A cyclic contact supply (for cyclic monitoring of external contacts) can be activated by SPI

and using the Direct Drive Input (DRV).

Each wake up event sets the device into the active mode and forces the RxD/NINT pin to

the low level.

Note:

Input TxD must be at recessive (high) level and CSN must be at high level in order to

achieve minimum standby current in V1-standby Mode.

Interrupt

The interrupt signal (linked to RxDL/NINT internally) indicates a wake-up event from

V1-standby mode. In case of activity on LIN or SPI access the NINT pin is pulled low for

tInterupt

In case of V1-standby mode and (IV1 > ICMP), the device remains in standby mode, the V1

regulator switches to high current mode and the watchdog starts. No Interrupt signal is

generated.

2.2.4

VBAT-standby mode

The transition from Active Mode to VBAT-standby mode is initiated by an SPI command.

In VBAT-standby Mode, the voltage regulator, relay outputs and LIN transmitter are switched

off. High side outputs remain in the configuration programmed prior to the standby

command.

In VBAT-standby mode the current consumption of the L99PM60J is reduced to a minimum

level.

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