TLE7809G datasheet(12/52 Pages) INFINEON

номер детали	TLE7809G

подробное описание детали	Integrated double low-side switch, high-side/LED driver, hall supply, wake-up inputs and LIN communication with embedded MCU (16kB Flash)

PDF	52 Pages

Scroll/Zoom	100%

производитель	INFINEON [Infineon Technologies AG]

домашняя страница	http://www.infineon.com

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TLE7809G

Operating Modes

Data Sheet

Rev. 3.01, 2008-04-15

4.5

Power Saving Modes

4.5.1

SBC Sleep Mode

During SBC Sleep Mode (see Figure 6), the lowest power consumption is achieved, by having its main voltage

regulator switched-off. As the microcontroller cannot be supplied, the integrated window watchdog can be disabled

in Sleep Mode via a dedicated SPI control bit. However, it can be turned-on for periodically waking-up the system,

e.g. ECU, by generating a reset and automatically switching to SBC Standby Mode.

This mode is entered via SPI command, and turns-off the integrated LIN bus transceiver, main voltage regulator

as well as all switches. Upon a voltage level change at the monitoring / wake-up pins or by LIN message the SBC

Sleep Mode will be terminated and the SBC Standby Mode will automatically be entered (turning-on the LDO).

Note: Upon a wake-up via LIN message the (internal) RxD signal stays “low” until mode switch.

Note: If the Window Watchdog was not enabled in Sleep Mode the Window Watchdog starts after wake-up with a

“long open window” in SBC Standby Mode.

Note: In Sleep Mode with activated watchdog (see Table 2 “SPI Input Data Bits” on Page 20) the oscillator

remains turned on.

Figure 6

State Diagram “SBC Sleep Mode”

Start Up

Power Up

SBC Standby Mode

Vcc

„single“ µController SPI -Command:

- select SBC Sleep Mode via SPI Mode Bits

- window watchdog activation / deactivation via SPI

[can remain active as periodic reset timer ]

SBC Active Mode

MS2

Vcc

MS1

MS0

0 / 1

transition caused by :

- event at MONx inputs

- LIN message

[SPI indicates source]

SBC Sleep Mode

MS2

OFF

Vcc

MS1

MS0

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