Preliminary C8051F120/1/2/3 C8051F124/5/6/7 - KEMT FEI TUKE

Preliminary
C8051F120/1/2/3
C8051F124/5/6/7
Figure 6.19. 10-Bit ADC0 Window Interrupt Example: Left Justified Differential Data
Input Voltage
(AD0.0 - AD0.1)
ADC Data
Word
Input Voltage
(AD0.0 - AD0.1)
ADC Data
Word
REF x (511/512)
0x7FC0
REF x (511/512)
0x7FC0
ADWINT
not affected
ADWINT=1
0x2040
0x2040
REF x (128/512)
REF x (-1/512)
0x2000
0x1FC0
0x0000
0xFFC0
ADC0LTH:ADC0LTL
ADWINT=1
ADC0GTH:ADC0GTL
REF x (128/512)
REF x (-1/512)
0x2000
0x1FC0
0x0000
0xFFC0
ADC0GTH:ADC0GTL
ADWINT
not affected
ADC0LTH:ADC0LTL
0xFF80
0xFF80
ADWINT
not affected
ADWINT=1
-REF
0x8000
Given:
AMX0SL = 0x00, AMX0CF = 0x01,
AD0LJST = ‘1’,
ADC0LTH:ADC0LTL = 0x2000,
ADC0GTH:ADC0GTL = 0xFFC0.
An ADC0 End of Conversion will cause an ADC0
Window Compare Interrupt (AD0WINT = ‘1’) if
the resulting ADC0 Data Word is < 0x2000 and
> 0xFFC0. (Two’s-complement math.)
-REF
0x8000
Given:
AMX0SL = 0x00, AMX0CF = 0x01,
AD0LJST = ‘1’,
ADC0LTH:ADC0LTL = 0xFFC0,
ADC0GTH:ADC0GTL = 0x2000.
An ADC0 End of Conversion will cause an ADC0
Window Compare Interrupt (AD0WINT = ‘1’) if
the resulting ADC0 Data Word is < 0xFFC0 or
> 0x2000. (Two’s-complement math.)
© 2002 Cygnal Integrated Products, Inc. DS008-0.8-AUG02 Page 81