Specifications

C8051F330/1
46 Rev. 1.1
5.4. Programmable Window Detector
The ADC Programmable Window Detector continuously compares the ADC0 output registers to user-programmed
limits, and notifies the system when a desired condition is detected. This is especially effective in an interrupt-driven
system, saving code space and CPU bandwidth while delivering faster system response times. The window detector
interrupt flag (AD0WINT in register ADC0CN) can also be used in polled mode. The ADC0 Greater-Than
(ADC0GTH, ADC0GTL) and Less-Than (ADC0LTH, ADC0LTL) registers hold the comparison values. The window
detector flag can be programmed to indicate when measured data is inside or outside of the user-programmed limits,
depending on the contents of the ADC0 Less-Than and ADC0 Greater-Than registers.
Figure 5.11. ADC0GTH: ADC0 Greater-Than Data High Byte Register
Bits7-0: High byte of ADC0 Greater-Than Data Word
R/W R/W R/W R/W R/W R/W R/W R/W Reset Value
11111111
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 SFR Address:
0xC4
Figure 5.12. ADC0GTL: ADC0 Greater-Than Data Low Byte Register
Bits7-0: Low byte of ADC0 Greater-Than Data Word
R/W R/W R/W R/W R/W R/W R/W R/W Reset Value
11111111
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 SFR Address:
0xC3