Silicon Laboratories C8051F340, C8051F347, C8051F346, C8051F341 Programmable Window Detector

C8051F340/1/2/3/4/5/6/7

5.4.Programmable Window Detector

The ADC Programmable Window Detector continuously compares the ADC0 conversion results 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 sys- tem 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 mea- sured data is inside or outside of the user-programmed limits, depending on the contents of the ADC0 Less-Than and ADC0 Greater-Than registers.

The Window Detector registers must be written with the same format (left/right justified, signed/unsigned) as that of the current ADC configuration (left/right justified, single-ended/differential).

SFR Definition 5.7. ADC0GTH: ADC0 Greater-Than Data High Byte

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

Bits7–0: High byte of ADC0 Greater-Than Data Word.

SFR Definition 5.8. ADC0GTL: ADC0 Greater-Than Data Low Byte

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

Bits7–0: Low byte of ADC0 Greater-Than Data Word.

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