IC-MSB datasheet(29/32 Pages) ICHAUS

29 / 32 page

iC-MSBSAFETY, iC-MSB2

SIN/COS SIGNAL CONDITIONER WITH 1Vpp DRIVER

Rev F3, Page 29/32

Driver Shutdown

PDMODE

Addr 0x18, bit 6

Code

Function

Driver shutdown terminates with the error event

Permanent driver shutdown until cycling power

Table 53: Driver Activation

Error Protocol

Out of the errors enabled by EMASKE both the first

error (under ERR1) and last error (under ERR2) which

occur after the iC-MSB is powered up are stored in the

EEPROM.

The EEPROM also has a memory area in which all oc-

curring errors can be stored (ERR3). Only the fact that

an error has occurred can be recorded, with no infor-

mation as to the time and count of appearance of that

error given. Error recording can be used to statistically

evaluate the causes of system failure, for example.

ERR1

Addr 0x20, bit 6:0

ERR2

Addr 0x22, bit 0; Adr 0x21, bit 7:2

ERR3

Addr 0x23, bit 2:0; Adr 0x22, bit 7:4

Bit

Error Event

9:0

Assignation according to EMASKE

Code

Function

No event

Registered error event

Table 54: Error Protocol

REVERSE POLARITY PROTECTION

The line drivers in iC-MSB are protected against re-

verse polarity and short-circuiting. A defective device

cable or one wrongly connected cause damage neither

to iC-MSB nor to the components protected against

reverse polarity by VDDS and GNDS.

The following pins are also reverse polarity protected:

PC, NC, PS, NS, PZ, NZ, ERR, VDD, GND and ACO

(as long as GNDS is only loaded versus VDDS). The

maximum voltage difference between the pins should

not exceed 6 V (respectively 8 V for pin ERR).

Note: If iC-MSB detects reverse polarity on power up,

the line drivers will not be enabled.

If the state of reverse polarity is resolved, iC-MSB re-

boots from the EEPROM and enables the line drivers.

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