Data Sheet

13

Rev. 1.0, 2008-10-30

TLE7237GS

Power Supply

5

Power Supply

The TLE7237GS is supplied by two supply voltages

V

feed and used by the power switches and by an integrated power supply for the register banks. There is an under

voltage reset function implemented for the

V

are reset to their default values and the device is in sleep mode (standby). The SPI command CMD.WAKE = 1 is

switching the device to operation mode (ON), while a command CMD.STB = 1 send the device to sleep mode

(standby) again.

The

V

daisy chain function is available as soon as

V

between pins

V

The device provides a sleep mode (stand by) to minimize current consumption, which also resets the register

banks. It is entered and left by dedicated SPI commands or by turning off the VDD supply.

5.1

Reset

There are several reset trigger implemented in the device. A reset switches off all channels and sets the registers

to default values. After any kind of reset, the transmission error flag (TER) is set.

Under Voltage Reset:

During this device condition a read on SPI always delivers the Standard Diagnostic Frame with a TER flag.

This under voltage reset is released when all the supply voltages levels are above under voltage threshold.

Reset Command: There is a reset command available to reset all register bits of the register bank and the

diagnosis registers. As soon as CMD.RST = 1, a reset is triggered.