C8051F700-GQR Silicon Laboratories Inc, C8051F700-GQR Datasheet - Page 64
C8051F700-GQR
Manufacturer Part Number
C8051F700-GQR
Description
MCU 8-Bit C8051F70x 8051 CISC 15KB Flash 1.8V/3V 64-Pin TQFP T/R
Manufacturer
Silicon Laboratories Inc
Datasheet
1.C8051F700DK.pdf
(306 pages)
Specifications of C8051F700-GQR
Package
64TQFP
Device Core
8051
Family Name
C8051F70x
Maximum Speed
25 MHz
Ram Size
512 Byte
Program Memory Size
15 KB
Operating Supply Voltage
1.8|3 V
Data Bus Width
8 Bit
Program Memory Type
Flash
Number Of Programmable I/os
54
Interface Type
I2C/SMBus/SPI/UART
On-chip Adc
16-chx10-bit
Operating Temperature
-40 to 85 °C
Number Of Timers
4
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C8051F70x/71x
10.4.1. Window Detector Example
Figure 10.4
ADC0LTH:ADC0LTL = 0x0080 (128d) and ADC0GTH:ADC0GTL = 0x0040 (64d). The input voltage can
range from 0 to VREF x (1023/1024) with respect to GND, and is represented by a 10-bit unsigned integer
value. In the left example, an AD0WINT interrupt will be generated if the ADC0 conversion word
(ADC0H:ADC0L) is within the range defined by ADC0GTH:ADC0GTL and ADC0LTH:ADC0LTL
(if 0x0040 < ADC0H:ADC0L < 0x0080). In the right example, and 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 < 0x0040 or ADC0H:ADC0L > 0x0080). Figure 10.5 shows an example using left-justi-
fied data with the same comparison values.
64
VREF x (128/1024)
VREF x (128/1024)
VREF x (64/1024)
VREF x (64/1024)
VREF x (1023/
VREF x (1023/
Input Voltage
(AIN - GND)
Input Voltage
(AIN - GND)
1024)
1024)
0
0
Figure 10.4. ADC Window Compare Example: Right-Justified Data
shows
ADC0H:ADC0L
Figure 10.5. ADC Window Compare Example: Left-Justified Data
ADC0H:ADC0L
0xFFC0
0x1FC0
0x0FC0
0x2040
0x2000
0x1040
0x1000
0x0000
0x03FF
0x007F
0x003F
0x0081
0x0080
0x0041
0x0040
0x0000
two
ADC0GTH:ADC0GTL
ADC0GTH:ADC0GTL
ADC0LTH:ADC0LTL
example
ADC0LTH:ADC0LTL
not affected
not affected
not affected
not affected
AD0WINT
AD0WINT
AD0WINT
AD0WINT
AD0WINT=1
AD0WINT=1
window
Rev. 1.0
comparisons
VREF x (128/1024)
VREF x (128/1024)
VREF x (64/1024)
VREF x (64/1024)
VREF x (1023/
VREF x (1023/
Input Voltage
Input Voltage
(AIN - GND)
(AIN - GND)
1024)
1024)
0
0
ADC0H:ADC0L
ADC0H:ADC0L
for
0xFFC0
0x1FC0
0x0FC0
0x03FF
0x007F
0x003F
0x2040
0x2000
0x1040
0x1000
0x0000
0x0081
0x0080
0x0041
0x0040
0x0000
right-justified
ADC0GTH:ADC0GTL
ADC0GTH:ADC0GTL
ADC0LTH:ADC0LTL
ADC0LTH:ADC0LTL
not affected
not affected
AD0WINT
AD0WINT
data,
AD0WINT=1
AD0WINT=1
AD0WINT=1
AD0WINT=1
with
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