AD7143 Analog Devices, AD7143 Datasheet - Page 27

• Manufacturer Part Number: AD7143
• Description: Programmable Controller for Capacitance Touch Sensors
• Manufacturer: Analog Devices

Specifications of AD7143

• Resolution (bits): 16bit
• # Chan: 8
• Sample Rate: n/a
• Interface: I²C/Ser 2-Wire,Ser
• Analog Input Type: n/a
• Ain Range: ± 2 pF (Delta C)
• Adc Architecture: Sigma-Delta
• Pkg Type: CSP

Table 13. Interrupt Mode Registers
Interrupt Mode
Sensor Touch
CDC Conversion Complete
Low
High
CONVERSIONS
SERIAL
READS
INT
NOTES
1. THIS IS AN EXAMPLE OF A CDC CONVERSION COMPLETE INTERRUPT.
2. THIS TIMING EXAMPLE SHOWS THAT THE INTERRUPT OUTPUT HAS BEEN ENABLED TO BE ASSERTED
3. STAGEx CONFIGURATION PROGRAMMING NOTES FOR STAGE0, STAGE5, AND STAGE9 (x = 0, 5, 9)
AT THE END OF A CONVERSION CYCLE FOR STAGE0 ONLY.
STAGEx_LOW_INT_EN (ADDRESS 0x005) = 0
STAGEx_HIGH_INT_EN (ADDRESS 0x006) = 0
STAGEx_COMPLETE_EN (ADDRESS 0x007) = 1
STAGE0
1
STAGE1
Interrupt Enable
Register Address
0x005
0x006
0x007
Figure 38. Example of Configuring the Registers for End of Conversion Interrupt Setup
STAGE2
STAGE3
STAGE4
Interrupt Status
Register Address
0x008
0x009
0x00A
STAGE5 STAGE6
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STAGE7
STAGE8
Notes
Interrupt asserted when the user contacts a sensor.
See Figure 37.
Enable for the CIN inputs connected to the CDC
positive stage.
Enable for the CIN inputs connected to the CDC
negative stage.
Continuous interrupt at the end of each STAGEx that
is enabled.
STAGE9 STAGE10 STAGE11 STAGE0 STAGE1
2
AD7143