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ZSSC3240 Datasheet(PDF) 23 Page - Renesas Technology Corp

Part # ZSSC3240
Description  Sensor Signal Conditioner IC for Resistive Sensors
PDF  64 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

ZSSC3240 Datasheet(HTML) 23 Page - Renesas Technology Corp

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ZSSC3240
Datasheet
Nov.27.20
Page 23
Detected Fault
Analog Ratiometric
Diagnostic Level, AOUT [a]
Analog Absolute Diagnostic
Level, AOUT [a]
OWI, SPI, I2C Status
Byte [7:0]
Comments
T_ext Pin Out of
Range
Lower
0 to 0.125 V [b]
0 to 0.025 V [c]
T_ext Pin Short to
INP
Lower
0 to 0.125 V [b]
0 to 0.025 V [c]
T_ext Pin Short to
INN
Lower
0 to 0.125 V [b]
0 to 0.025 V [c]
Die Crack /
Chipping Check
Lower
0 to 0.125 V [b]
0 to 0.025 V [c]
SSC Calculation
Unit Saturation
Upper (extra)
4.875 V to VDD [b]
0.975 to 1.0 V [c]
0XXX XXX1BIN
[a]
Only signalized if diagouten = 1BIN.
[b]
With VDD = 5V ±10%, for 0 to 5V absolute analog out.
[c]
With any VDD, for 0 to 1V absolute analog out.
[d]
Do not enable if the IC is connected to an absolute voltage source sensor, for example, Thermopile (sensor_sup = 10BIN) with
typical internal resistances >60kΩ.
If multiple failures are detected leading to analog outputs that would be contradictory to each other, the high
signal is always provided. The effective absolute, analog diagnostic-output level is constant for lower and upper
diagnostic signal output. This absolute level may vary from IC to IC slightly. Hence, the effective lower and upper
level for the absolute AOUT signal in the event of a valid diagnostic and failure event, respectively, are not
influenced by any diagnostic-related setup in NVM nor by calibration coefficients, etc., per the Aout_setup bit
field in register 04HEX in NVM (see Table 34). However, the threshold (i.e., the sensor-signal-valid maximum for
the upper and minimum for the lower diagnostic band) can be programmed and adjusted via proper calibration
and the diagouten bit in register 04HEX.
Table 17.
Information Assignment for CHECK_DIAG Command: Output Register diagnosticreg [15:0]
Meaning
Connection Check
Content
DAC
Output [a]
Bit-Number
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
No Error / Fault
Yes
From SSC
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Fault information improved since
last status information
Yes
–
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
Loss of sensor positive
connection, INP
Yes
2dacres
– 7
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
Loss of sensor negative
connection, INN
Yes
2dacres
– 7
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
Signal at INP pin out of range
(leaking / short to VSS or VDDB)
Yes
2dacres
– 7
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
Signal at INN pin out of range
(leaking / short to VSS or VDDB)
Yes
2dacres
– 7
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
Sensor short (INN = INP)
Yes
2dacres
– 7 0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
TEXT pin open
Yes
0007HEX
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
Signal at TEXT pin out of range
(leaking / short to VSS or VDDB)
Yes
0007HEX
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
TEXT pin short to INN
Yes
0007HEX
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
SSC Calculation Unit saturation
No
2dacres
– 7 0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
Memory error, checksum-check
failure
No
0007HEX
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
TEXT pin short to INP
Yes
0007HEX
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
Die crack / chipping check failure
No
0007HEX
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
[a]
The effective low limit for the DAC and resulting AOUT output signaling scales with the set up DAC resolution and is 16-bit =
0007HEX, 15-bit = 000EHEX, 14-bit = 0015HEX, or 13-bit = 001CHEX.
If a bit reset, i.e. a change from 1BIN (FAULT) back to 0BIN (NO-FAULT), for any bit occurs, diagnosticreg[0] is set
in order to signal an improvement of fault states during the ZSSC3240 operation. This is especially relevant for
Cyclic Mode and Continuous Analog-Output Mode operation.



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