Adc_Selftest(); Description; Actions; Prototype - Infineon SP37 Function Manual

2.12

ADC_Selftest()

2.12.1

Description

The ADC self test is a combination of three measurements that use various channels as input and reference for
the ADC. The output of this function is the delta deviation from the ideal value.
2.12.2

Actions

• Perform three ADC measurements
• Calculate delta from ideal value
2.12.3

Prototype

unsigned char ADC_Selftest(signed int idata * Delta)
2.12.4

Inputs

Table 58 ADC_Selftest: Input Parameters
Register / Address
R7
2.12.5

Outputs

Table 59 ADC_Selftest: Output values
Register/ Address
R7
*Delta
ROM Library Function Guide
Type Name
signed int Delta
idata*
Type Name
unsigned char StatusByte
signed int Delta
idata*
Tire Pressure Monitoring Sensor
Description
Pointer to an integer array in RAM to receive the
ADC measurement result
Description
0000.0000 : Success
B
xxxx.xxx1 : Underflow of ADC Result
B
xxxx.xx1x : Overflow of ADC Result
B
The ADC can be considered as working when the
value of Delta is between +/-6 LSBs after a call of
this function during which the supply voltage was
constant.
69
SP37
ROM Library Functions
Revision 1.0, 2011-12-15