TLE7809G datasheet(23/52 Pages) INFINEON

23 / 52 page

Data Sheet

Rev. 3.01, 2008-04-15

TLE7809G

SPI (Serial Peripheral Interface)

Supply Output (OC / OT)

S UV

5) [only “SBC Active Mode”]

“low”

1) “1” = ON / enable, “0” = OFF / disable, OC = overcurrent, UV = undervoltage,

OT = overtemperature (temp. shut-down)

2) “1” = ON, “0” = OFF, OC = overcurrent, UV = undervoltage, OT = overtemperature (temp. shut-down)

3) Becomes valid after start-up time for voltage monitoring

4) Voltage monitoring not active in SBC Standby Mode

5) This bit needs to be read twice to indicate an undervoltage condition (only for

S ramping down - bit15 set to “1”)

Table 10

Diagnostic, Protection and Safety Functions

Module

Function

Effect

Concept

Window Watchdog WD1) Failure

Reset; see Table 11 “Reset

Behavior SBC” on Page 25

SPI status latched until

next read-out

LDO (VReg)

OC2) at

current limitation

–

voltage regulator

UV condition

(

S related)

Reset, see Table 11 “Reset

Behavior SBC” on Page 25

Condition occurs at

below operating range

CC-UV

Reset, see Table 11 “Reset

Behavior SBC” on Page 25

–

WD current threshold

(Stop Mode)

WD only disabled if

CC-current < threshold and

WD not enabled via SPI

WD enabled if

CC-current > threshold

OT3)

CC-shutdown, Reset as soon as

CC falls below reset threshold, see

Table 11 “Reset Behavior SBC”

on Page 25

automatically enabled with

thermal hysteresis

OT prewarning

SPI status output

SPI status latched until

next read-out

internal supply

[SBC]

(

S related)

INT-UV

(internal) Reset; register settings

cleared; SPI status output; see

Table 11 “Reset Behavior SBC”

on Page 25

–

LS-Switches

OC, OT

LSx-shutdown; SPI status output;

signalization via ERR pin

re-activation via SPI

command; SPI status

latched until next read-out

microcontroller error

signalization (ERR)

LSx-shutdown; see “Error

Interconnect (ERR)” on Page 32

re-activation via SPI

command

Supply Output

OC, OT

Supply-shutdown; SPI status

output

re-activation via SPI

command; SPI status

latched until next read-out

Table 9

SPI Output Data (cont’d)

Pos.

Output Data1)

Output Data after Wake-up2)

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