C8051F310-TB Silicon Laboratories Inc, C8051F310-TB Datasheet - Page 64
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C8051F310-TB
Manufacturer Part Number
C8051F310-TB
Description
BOARD PROTOTYPING W/C8051F310
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Specifications of C8051F310-TB
Contents
Board
Processor To Be Evaluated
C8051F31x
Interface Type
USB
Silicon Manufacturer
Silicon Labs
Core Architecture
8051
Silicon Core Number
C8051F310
Silicon Family Name
C8051F31x
Kit Contents
Board
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
C8051F310
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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C8051F310/1/2/3/4/5/6/7
5.4.2. Window Detector In Differential Mode
Figure 5.8 shows two example window comparisons for right-justified, differential data, with
ADC0LTH:ADC0LTL = 0x0040 (+64d) and ADC0GTH:ADC0GTH = 0xFFFF (-1d). In differential mode, the
measurable voltage between the input pins is between -VREF and VREF*(511/512). Output codes are rep-
resented as 10-bit 2’s complement signed integers. In the left example, an AD0WINT interrupt will be gen-
erated if the ADC0 conversion word (ADC0H:ADC0L) is within the range defined by ADC0GTH:ADC0GTL
and ADC0LTH:ADC0LTL (if 0xFFFF (-1d) < ADC0H:ADC0L < 0x0040 (64d)). In the right example, an
AD0WINT interrupt will be generated if the ADC0 conversion word is outside of the range defined by the
ADC0GT and ADC0LT registers (if ADC0H:ADC0L < 0xFFFF (-1d) or ADC0H:ADC0L > 0x0040 (+64d)).
Figure 5.9 shows an example using left-justified data with the same comparison values.
64
VREF x (511/512)
VREF x (511/512)
VREF x (64/512)
VREF x (64/512)
VREF x (-1/512)
Figure 5.8. ADC Window Compare Example: Right-Justified Differential Data
VREF x (-1/512)
Input Voltage
Input Voltage
Figure 5.9. ADC Window Compare Example: Left-Justified Differential Data
(Px.x - Px.x)
(Px.x - Px.x)
-VREF
-VREF
ADC0H:ADC0L
ADC0H:ADC0L
0xFFFF
0xFFFE
0x7FC0
0x0FC0
0xFFC0
0x01FF
0x0041
0x0040
0x003F
0x0000
0x0200
0x1040
0x1000
0x0000
0xFF80
0x8000
ADC0GTH:ADC0GTL
ADC0GTH:ADC0GTL
ADC0LTH:ADC0LTL
ADC0LTH:ADC0LTL
not affected
not affected
not affected
not affected
AD0WINT
AD0WINT
AD0WINT
AD0WINT
AD0WINT=1
AD0WINT=1
Rev. 1.7
VREF x (511/512)
VREF x (511/512)
VREF x (64/512)
VREF x (64/512)
VREF x (-1/512)
VREF x (-1/512)
Input Voltage
Input Voltage
(Px.x - Px.x)
(Px.x - Px.y)
-VREF
-VREF
ADC0H:ADC0L
ADC0H:ADC0L
0xFFFF
0xFFFE
0x7FC0
0x0FC0
0xFFC0
0x01FF
0x0041
0x0040
0x003F
0x0000
0x0200
0x1040
0x1000
0x0000
0xFF80
0x8000
ADC0GTH:ADC0GTL
ADC0GTH:ADC0GTL
ADC0LTH:ADC0LTL
ADC0LTH:ADC0LTL
not affected
not affected
AD0WINT
AD0WINT
AD0WINT=1
AD0WINT=1
AD0WINT=1
AD0WINT=1
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