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ELMOS Semiconductor AG

Data Sheet

QM-No.: 25DS0091E.00

PRELIMINARY INFORMATION - JUL 28, 2011

This document contains information on a pre-production product. ELMOS Semiconductor AG reserves the right to change specifications and information herein without notice.

INTEGRATED CIRCUIT FOR PIR SMART SENSOR

E910.97

Test Modes___________________________________________________

INPUTS

OUTPUT

MODE

OEN

ENVREG

SENS

ONTIME

PIRIN

NPIRIN

REL

ENVREG

SENS

ONTIME

PIRIN

NPIRIN

REL

Normal Operation

ACLK

SENS

ONTIME

PIRIN

NPIRIN

DOCI- DAC

Data Out – Clock in

ATEST2

TCLK

SENS

ONTIME

SDI

SCAN_EN

SCAN OUT

Digital Test

ENVREG

SENS

PIRIN

NPIRIN

DOCI - LPF

Data Out – Clock in

ATEST1

ENVREG

SENS

PIRIN

NPIRIN

DATA

Initialize self test mode

ATEST0

Table 6: Device Test nodes

Analog Test Modes

In ATEST1 ‘Data Out – Clock in’ (DOCI - LPF) - mode,

the filter data as well as the PIN SCAN data is

available as a 28 bit word on the REL output.

Whenever a new filter value is generated, the REL

output is switched to high level. Reading of data has to

be completed in less than 30 system cycles after the

REL output goes to VDD. The DOCI protocol is used

to read the word.

In ATEST2 ‘Data Out – Clock in’ (DOCI - DAC) -

mode, the DAC data is available as a word on the REL

output. The data must be read within 1 system clock.

The DOCI protocol is used to read the word.

Self Test Mode

Self test mode is initialized by applying a voltage of

inputs are connected to a switched capacitor circuit

and charged up in steps. The resulting voltages are

captured like in the ATEST1 (DOCI - LPF) test mode.

The data includes the voltages measured on the SENS

and ONTIME inputs.

Digital Test Mode

The scan-path is switched with the NPIRIN input. Scan

data is applied to PIRIN. ENVREG is test clock input.

The levels on the PIRIN/NPIRIN inputs must be

(L/H). This test mode is only used for chip testing.

Fig. 2: Pin scan and LPF DOCI data out

Fig. 3: DAC DOCI data out

SENS[6:0]

REL

32 x C_G

ONTIME[3:0]

LPF FILTER[15:0]

SENS[6:0]

SENS[6:0]

REL

C_G

ONTIME[3:0]

DAC [5:0]

SENS[6:0]