SBASA74A January 2023 – April 2024 ADS9218 , ADS9219
ADVMIX
The ADS921x features test patterns (Figure 6-7) used by the host for debugging and verifying the data interface. The test patterns replace the ADC output data with predefined digital data. Enable the test patterns by configuring the corresponding register addresses 0x13 through 0x1B in bank 1.
Table 6-8 lists the test patterns supported by the ADS921x.
ADC OUTPUT | TP_EN_CHA TP_EN_CHB |
TP_MODE_CHA TP_MODE_CHB |
SECTION | RESULT#OL_WFT_JH4_L1C |
---|---|---|---|---|
ADC conversion result | 0 | |||
Fixed pattern | 1 | 0 or 1 | Fixed PatternAlternating Test PatternDigital Ramp | ADC A = TP0_A ADC B = TP0_B |
Digital ramp | 1 | 2 | Fixed PatternAlternating Test PatternDigital Ramp | ADC A = Digital ramp ADC B = Digital ramp |
Alternating test patterns | 1 | 3 | Fixed PatternAlternating Test PatternDigital Ramp | ADC A = TP0_A, TP1_A ADC B = TP0_B, TP1_B |