C8051F121-GQR Silicon Laboratories Inc, C8051F121-GQR Datasheet - Page 100
C8051F121-GQR
Manufacturer Part Number
C8051F121-GQR
Description
IC 8051 MCU FLASH 128K 64TQFP
Manufacturer
Silicon Laboratories Inc
Series
C8051F12xr
Specifications of C8051F121-GQR
Core Processor
8051
Core Size
8-Bit
Speed
100MHz
Connectivity
EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o
32
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
8.25K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 8x8b, 8x12b; D/A 2x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TQFP, 64-VQFP
Processor Series
C8051F1x
Core
8051
Data Bus Width
8 bit
Data Ram Size
8.25 KB
Interface Type
I2C, SMBus, SPI, UART
Maximum Clock Frequency
100 MHz
Number Of Programmable I/os
32
Number Of Timers
5
Operating Supply Voltage
2.7 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
PK51, CA51, A51, ULINK2
Development Tools By Supplier
C8051F120DK
Minimum Operating Temperature
- 40 C
On-chip Adc
12 bit, 8 Channel
On-chip Dac
12 bit, 2 Channel
For Use With
336-1224 - DEVKIT-F120/21/22/23/24/25/26/27
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
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Part Number
Manufacturer
Quantity
Price
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Part Number:
C8051F121-GQR
Manufacturer:
Silicon Laboratories Inc
Quantity:
10 000
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7.3.
The ADC2 Programmable Window Detector continuously compares the ADC2 output to user-programmed
limits, and notifies the system when a desired condition is detected. This is especially effective in an inter-
rupt-driven system, saving code space and CPU bandwidth while delivering faster system response times.
The window detector interrupt flag (AD2WINT in register ADC2CN) can also be used in polled mode. The
ADC2 Greater-Than (ADC2GT) and Less-Than (ADC2LT) registers hold the comparison values. Example
comparisons for Differential and Single-ended modes are shown in Figure 7.6 and Figure 7.5, respectively.
Notice that the window detector flag can be programmed to indicate when measured data is inside or out-
side of the user-programmed limits, depending on the contents of the ADC2LT and ADC2GT 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. Notice that in Single-ended mode, the codes vary from 0 to VREF*(255/256) and are
represented as 8-bit unsigned integers. In the left example, an AD2WINT interrupt will be generated if the
ADC2
(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
(AIN2.x - AGND)
REF x (255/256)
REF x (32/256)
REF x (16/256)
Input Voltage
ADC2 Programmable Window Detector
conversion
0
Figure 7.5. ADC2 Window Compare Examples, Single-Ended Mode
ADC2
0xFF
0x21
0x20
0x1F
0x11
0x10
0x0F
0x00
word
(ADC2)
not affected
not affected
AD2WINT
AD2WINT
ADC2GT
ADC2LT
is
within
AD2WINT=1
Rev. 1.4
the
(AIN2.x - AGND)
REF x (255/256)
REF x (32/256)
REF x (16/256)
Input Voltage
range
0
defined
ADC2
0xFF
0x1F
0x0F
0x21
0x20
0x11
0x10
0x00
by
ADC2GT
not affected
AD2WINT
ADC2GT
ADC2LT
and
AD2WINT=1
AD2WINT=1
ADC2LT
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