C8051F047R Silicon Labs, C8051F047R Datasheet - Page 100
C8051F047R
Manufacturer Part Number
C8051F047R
Description
8-bit Microcontrollers - MCU 25 MIPS 32KB 10ADC
Manufacturer
Silicon Labs
Datasheet
1.C8051F044R.pdf
(328 pages)
Specifications of C8051F047R
Product Category
8-bit Microcontrollers - MCU
Core
8051
Data Bus Width
8 bit
Maximum Clock Frequency
25 MHz
Program Memory Size
32 KB
Data Ram Size
4.25 KB
On-chip Adc
Yes
Operating Supply Voltage
2.7 V to 3.6 V
Package / Case
TQFP-64
Mounting Style
SMD/SMT
A/d Bit Size
10 bit
A/d Channels Available
13
Data Rom Size
64 KB
Interface Type
CAN, SMBus, SPI, UART
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Number Of Programmable I/os
32
Number Of Timers
16 bit
Processor Series
C8051
Program Memory Type
Flash
Factory Pack Quantity
500
Supply Voltage - Max
3.6 V
Supply Voltage - Min
2.7 V
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C8051F040/1/2/3/4/5/6/7
7.3.
The ADC2 Programmable Window Detector continuously compares the ADC2 output to user-programmed
limits, and notifies the system when an out-of-bound condition is detected. This is especially effective in an
interrupt-driven system, saving code space and CPU bandwidth while delivering faster system response
times. The window detector interrupt flag (AD2WINT in ADC2CN) can also be used in polled mode. The
reference words are loaded into the ADC2 Greater-Than and ADC2 Less-Than registers (ADC2GT and
ADC2LT). Notice that the window detector flag can be asserted when the measured data is inside or out-
side the user-programmed limits, depending on the programming of the ADC2GT and ADC2LT registers.
7.3.1. Window Detector in Single-Ended Mode
Figure 7.5 shows two example window comparisons for Single-ended mode, with ADC2LT = 0x20 and
ADC2GT = 0x10. In Single-ended mode, the codes vary from 0 to VREF x (255/256) and are represented
as 8-bit unsigned integers. In the left example, an AD2WINT interrupt will be generated if the ADC2 con-
version word (ADC2) is within the range defined by ADC2GT and ADC2LT (if 0x10 ADC2 0x20). In the
right example, and AD2WINT interrupt will be generated if ADC2 is outside of the range defined by
ADC2GT and ADC2LT (if ADC2 0x10 or ADC2 0x20).
100
Bits7-0:
Bits7-0:
R/W
R/W
Bit7
Bit7
ADC2 Programmable Window Detector
High byte of ADC2 Greater-Than Data Word.
Low byte of ADC2 Greater-Than Data Word.
R/W
R/W
Bit6
Bit6
SFR Definition 7.6. ADC2GT: ADC2 Greater-Than Data
SFR Definition 7.7. ADC2LT: ADC2 Less-Than Data
R/W
R/W
Bit5
Bit5
R/W
R/W
Bit4
Bit4
Rev. 1.5
R/W
R/W
Bit3
Bit3
R/W
R/W
Bit2
Bit2
R/W
R/W
Bit1
Bit1
SFR Address:
SFR Address:
SFR Page:
SFR Page:
R/W
R/W
Bit0
Bit0
0xC4
2
0xC6
2
00000000
Reset Value
Reset Value
11111111
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