TLE8262E datasheet(64/93 Pages) INFINEON

64 / 93 page

Data Sheet

Rev. 1.0, 2009-03-31

TLE8262E

Interrupt Function

12.2

Interrupt Timing

Figure 30 illustrates the interrupt timing. The INT output is set LOW as soon as an interrupt condition occurs. The

INT pin is released after a SPI interrupt buffer read out command, that is performed with a Read Only command

(111) to register (000). In case consecutive interrupt sources are indicated before the SPI read out, only one INT

LOW will be raised but the SPI read out will indicate the interrupt sources. A time-out feature is implemented. The

INT pin can be active LOW only for the time

INTTO. Afterwards, the INT pin is released but the INT source is still

valid or present in the SPI register. Between two activations of the INT, there is at least a delay of tINTTO. If an

interrupt occurs in the meantime, the information is stored and the INT will go LOW after

INTO. The INT pulse width

is at minimum tINT.

Figure 30

Interrupt Timing

12.3

Interrupt Modes with SBC Modes

The interrupt function is possible only in SBC Normal and Stop Mode.

After an SBC Restart Mode, all interrupt sources are enabled.

12.4

Interrupt Application Information

By default, all interrupt sources are activated. Please refer to the dedicated chapter for the definition of the

interrupt.

The INT output is active for at least

INT, even if the corresponding interrupt register is read out immediately after

the interrupt event occurs.

If no SPI read is done after the interrupt is generated (INT pin low) the INT output becomes active (INT pin high)

again after

INTTO.

If two interrupt cases occur after each other and the SPI read (with read-only) is done after the second interrupt

case, both interrupt bits are cleared. Although the interrupt bits for both interrupt cases are cleared the second

interrupt will be issued by INT pin Low. This can lead to an interrupt where all interrupt bits are read as “0”.

interrupt source 1

interrupt source 2

INT output

inactive

active

inactive

active

SPI read out

INT TO

interupt timing.vsd

SPI read out

tINTTO

tINT

SPI read out

INTTO

tINTTO

SPI read out

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