C8051F02X Datasheet, PDF (55/272 Pages) Silicon Laboratories – 8K ISP FLASH MCU Family

C8051F020/1
Figure 5.17. 12-Bit ADC0 Window Interrupt Example: Right Justified Differential Data
Input Voltage
(AD0 - AD1)
REF x (2047/2048)
ADC Data
Word
0x07FF
AD0WINT
not affected
REF x (256/2048)
REF x (-1/2048)
0x0101
0x0100
0x00FF
0x0000
0xFFFF
0xFFFE
ADC0LTH:ADC0LTL
AD0WINT=1
ADC0GTH:ADC0GTL
Input Voltage
(AD0 - AD1)
REF x (2047/2048)
ADC Data
Word
0x07FF
AD0WINT=1
REF x (256/2048)
REF x (-1/2048)
0x0101
0x0100
0x00FF
0x0000
0xFFFF
0xFFFE
ADC0GTH:ADC0GTL
AD0WINT
not affected
ADC0LTH:ADC0LTL
AD0WINT
not affected
-REF
0xF800
Given:
AMX0SL = 0x00, AMX0CF = 0x01,
AD0LJST = ‘0’,
ADC0LTH:ADC0LTL = 0x0100,
ADC0GTH:ADC0GTL = 0xFFFF.
An ADC0 End of Conversion will cause an ADC0
Window Compare Interrupt (AD0WINT = ‘1’) if
the resulting ADC0 Data Word is < 0x0100 and
> 0xFFFF. (In two’s-complement math,
0xFFFF = -1.)
AD0WINT=1
-REF
0xF800
Given:
AMX0SL = 0x00, AMX0CF = 0x01,
AD0LJST = ‘0’,
ADC0LTH:ADC0LTL = 0xFFFF,
ADC0GTH:ADC0GTL = 0x0100.
An ADC0 End of Conversion will cause an ADC0
Window Compare Interrupt (AD0WINT = ‘1’) if
the resulting ADC0 Data Word is < 0xFFFF or
> 0x0100. (In two’s-complement math,
0xFFFF = -1.)
Rev. 1.4
55