TLE6244X datasheet(34/70 Pages) INFINEON

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Final Data Sheet

V4.2, 2003-08-29

TLE 6244X

1.10 VDD-Monitoring

Overview:

The VDD-monitoring generates a „low“ signal at the bidirectional pin ABE if the 5V supply volt-

age at pin VDD is out of the permissible range of 4.5V...5.5V. On ABE = low the power stages of

TLE6244X are switched off. Exception: OUT8 is not switched off in case of parallel control via

IN8 by the VDD monitoring undervoltage threshold, but by a threshold of 3.5V at VDD.

On shorting pin ABE to VDD or UBATT (≤ 36V), the power stages will be switched off in case of

undervoltage or overvoltage at pin VDD in spite of ABE = high.

The behavior of the ABE level on the return of VDD out of the undervoltage range into the cor-

rect range is not configurable. At the transition from undervoltage to normal voltage the signal

at pin ABE goes high after a filtering time is expired. The behavior of the ABE level on the

return of VDD out of the overvoltage range into the correct range is configurable in

STATCON_REG, Bit5. At the transition from overvoltage to normal voltage the signal at pin ABE

goes high either after a filtering time (OV not latched) or after a SPI writing instruction (OV

latched, state after reset).

On undervoltage condition the signal at pin ABE goes high after a filtering time is expired. On

overvoltage condition pin ABE goes high either after a filtering time or after a SPI writing instruc-

tion. Before this SPI instruction is sent to TLE6244X appropriate tests can be carried out by the

controller.

If the voltage at pin VDD is below the lower limit or is resp. was above the upper limit, this can

be read out by the SPI instruction RD_STATCON.

VDD-monitoring has no influence on SCON_REGx, MUX_REGx, DIA_REGx, CONFIG and

INP_REGx.

If output stages are switched off by the internal over-/undervoltage detection or by externally

applying a low signal at the ABE pin, no failure storage (DIAREG1...5) may occur.

Description in Detail:

Description of the Register:

STATCON_REG

Bit 7

1: Normal operation

0: Test of VDD threshold

Access by controller: read/write

State of reset: 1

Bit 6

1: Testing the lower threshold (if bit 7 = 0)

0: Testing the upper threshold (if bit 7 = 0)

Access by controller: read/write

State of reset: 1

Bit 5

1: ABE latched after overvoltage

0: ABE deactivated immediately after the disappearance of the overvoltage

Access by controller: read/write

State of reset: 1

Bit 2

Reading out the level at pin ABE

Access by controller: read only

Bit 1

1: no undervoltage at pin VDD

0: undervoltage at pin VDD

Access by controller: read only

TLE6244X Datasheet(PDF) 34 Page - Infineon Technologies AG

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