12ASX2 datasheet(79/147 Pages) INFINEON

79 / 147 page

EiceDRIVER

™ SIL

1EDI2002AS

Protection and Diagnostics

Datasheet

Rev. 3.1, 2015-07-30

Hardware Description

3.5.9

Internal Clock Supervision

The Primary Clock Supervision functionality is summarized in Table 3-20:

The clock supervision function consists on the primary clock supervision and the TCF feature.

Primary Clock Supervision

The purpose of this supervision function is to verify the frequency deviation of the primary clock. This function

works in such a way that the PWM input signal is used to start and stop a counter clocked by OSC1. The function

is activated when the device is in OPM5 or OPM6. The counter is incremented for the duration of the High level at

pin INP. At a High-to-Low transition at pin INP, the counter is stopped, and its content is transferred to bit field

PCS.CS1. A plausibility check can therefore be made by the logic. In case of a long INP pulse, the counter does

not overflow but stays at the maximum value until cleared. PCS.CS1 is cleared by setting bit PCTRL.CLRP.

The INP signal is not issued at the output stage.

Note: OSC2 is indirectly monitored by the Life Sign mechanism.

Timing Calibration Feature

The purpose of this supervision function is to measure the frequency of oscillator SSOC2. The PWM input signal

is used to start and stop a counter clocked by SSOSC2. The function is activated when the device is in OPM6

(only). The counter is incremented for the duration of the High level at pin INP. At a High-to-Low transition at pin

INP, the counter is stopped, and its content is transferred to bit field SCS.CS2. A plausibility check can therefore

be made by the logic. In case of a long INP pulse, the counter does not overflow but stays at the maximum value

until cleared. SCS.CS2 is cleared by a reset event only.

The INP signal is not issued at the output stage.

3.5.10

DIO Supervision

The IGBT State Monitoring mechanisms summarized in Table 3-13:

Table 3-20 Primary Clock Supervision Overview

Parameter

Short Description

Function

Supervision of the frequency of OSC1 and SSOSC2.

Periodicity

On Request.

Action in case of event

N.a.

Programmability

In-System Testability

Table 3-21 DIO Supervision Overview

Parameter

Short Description

Function

Supervision of the Digital Channel.

Periodicity

On Request.

Action in case of failure event

None.

Programmability

No.

In-System Testability

No.

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