TLE7263E datasheet(12/63 Pages) INFINEON

12 / 63 page

Data Sheet

Rev. 1.51, 2007-06-22

TLE 7263E

Features

4.3

SBC Sleep Mode with Cyclic Sense

In order to reduce the current consumption to a minimum, but still supply a wake-up

circuit periodically, the SBC offers a Sleep Mode with Cyclic Sense (see Figure 5). This

mode is entered via SPI command, and turns-off the integrated bus transceivers and

respective termination, as well as the main voltage regulator. The High-Side switch is

turned-on according to the SPI timings setting for cyclic sense, as there is the cyclic

sense period and the on-time. Upon a voltage level change at the monitoring/wake-up

pins or by a CAN or LIN message the SBC Sleep Mode will be terminated and the SBC

Standby Mode will automatically be entered. The respective RxD pin of the transceiver

that generated the wake-up will be pulled low.

Figure 5

State Diagram “SBC Sleep Mode with Cyclic Sense”

Start Up

Power Up

cyclic_sense_sleep_TLE7263

µController SPI-Command:

- select „cyclic sense period“ via SPI Timing Bits

- select HS-Switch on-time via SPI „On-Time Bit“

- 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

Vcc1

MS1

0 / 1

MS0

0 / 1

transition caused by:

- event at MON1 - 3 inputs

[only during HS-ON state]

- event at MON4 input

- CAN message

- LIN message

[SPI indicates source]

SBC Sleep Mode

MS2

OFF

Vcc1

MS1

MS0

HS-Switch = OFF

HS cyclic sense

MS2

OFF

Vcc1

MS1

MS0

HS-Switch = ON

after „on-time“

„sense period“

Initialization of

MONx inputs 1)

1) if initialization fails, device is

switched into SBC Standby mode

SBC Standby Mode

Vcc1

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