ZIOL2202 datasheet(46/91 Pages) ETC2

46 / 91 page

ZIOL2xxx – IC Family

IO-Link compliant HV Line Driver IC Family

Data Sheet

January 31, 2012

the prior written consent of the copyright owner. The information furnished in this publication is PRELIMINARY and subject to

changes without notice.

46 of 90

Reg.-Name

Addr.

Bit-Field

Bit Reset-

Value

r/w

Comment

Reference

26 RESERVED

7:2

r/rst

RESERVED

26 MON_LINE_FAULT

r/rst

Line fault occurred

26 MON_UNDER_VOLTAGE

r/rst

Under voltage

occurred

Manufacture Use Only

27:30

7:0

Read returns 0

PRODUCT_ID

7:0

Allows to retrieve

product and revision

information

Added in

Rev B

3.3.10. Interrupt and IC Lock Mode Control

3.3.10.1. Interrupt Handling

The INT_L pin provides indication functionality for a set of IC-internal exceptions. Once an exception had

occurred, expressed as logic low of the INT_L signal, the actual cause can be evaluated by reading the IC’s

status register via the SPI interface. Depending on the condition – a reset of the exception by reading the

corresponding status register can be performed.

The following exceptions are combined in the INT indication functionality:

 Lock caused by power fail detector (refer to chapter 3.5)

 Lock caused by COM-Overload (refer to chapter 3.3.10)

 Lock caused by AUX-Overload (refer to chapter 3.3.10)

 Lock caused by over-temperature (refer to chapter 3.3.10)

 EEPROM-single-bit-error (refer to chapter 3.3.7)

 EEPROM-2bit-error (refer to chapter 3.3.7)

 Valid-flag-cleared due to possibly corrupt EEPROM (refer to chapter 3.3.7)

 WURQ detected (refer to chapter 3.3.4)

Figure 3.14 illustrates the handling of the above mentioned exceptions and their monitoring. It also shows how to

configure the interrupt (INT_L pin) and wake-up (WURQ_L pin) signal generation. Besides several exceptions

concerning channel overload, die over-temperature and IO-Link specific wake-up situations the IC can also signal

problems as regards the EEPROM.

Since the configuration registers get their content initially from the EEPROM, the data should be correct. The

following described features make sure that no corrupt EEPROM data can cause unwanted IC configurations.

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