C8051F02X Datasheet, PDF (71/272 Pages) Silicon Laboratories – 8K ISP FLASH MCU Family

C8051F022/3
Figure 6.17. 10-Bit ADC0 Window Interrupt Example: Right Justified Differential Data
Input Voltage
(AD0 - AD1)
REF x (511/512)
ADC Data
Word
0x01FF
ADWINT
not affected
REF x (256/512)
REF x (-1/512)
0x0101
0x0100
0x00FF
0x0000
0xFFFF
0xFFFE
ADC0LTH:ADC0LTL
ADWINT=1
ADC0GTH:ADC0GTL
Input Voltage
(AD0 - AD1)
REF x (511/512)
ADC Data
Word
0x01FF
ADWINT=1
REF x (256/512)
REF x (-1/512)
0x0101
0x0100
0x00FF
0x0000
0xFFFF
0xFFFE
ADC0GTH:ADC0GTL
ADWINT
not affected
ADC0LTH:ADC0LTL
ADWINT
not affected
-REF
0xFE00
Given:
AMX0SL = 0x00, AMX0CF = 0x01, ADLJST = 0,
ADC0LTH:ADC0LTL = 0x0100,
ADC0GTH:ADC0GTL = 0xFFFF.
An ADC End of Conversion will cause an ADC
Window Compare Interrupt (ADWINT=1) if the
resulting ADC Data Word is < 0x0100 and
> 0xFFFF. (In two’s-complement math,
0xFFFF = -1.)
ADWINT=1
-REF
0xFE00
Given:
AMX0SL = 0x00, AMX0CF = 0x01, ADLJST = 0,
ADC0LTH:ADC0LTL = 0xFFFF,
ADC0GTH:ADC0GTL = 0x0100.
An ADC End of Conversion will cause an ADC
Window Compare Interrupt (ADWINT=1) if the
resulting ADC Data Word is < 0xFFFF or
> 0x0100. (In two’s-complement math,
0xFFFF = -1.)
Rev. 1.4
71