C8051F020 Silicon Laboratories Inc, C8051F020 Datasheet - Page 29
![no-image](/images/manufacturer_photos/0/6/609/silicon_laboratories_inc_sml.jpg)
C8051F020
Manufacturer Part Number
C8051F020
Description
IC 8051 MCU 64K FLASH 100TQFP
Manufacturer
Silicon Laboratories Inc
Series
C8051F02xr
Specifications of C8051F020
Core Processor
8051
Core Size
8-Bit
Speed
25MHz
Connectivity
EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o
64
Program Memory Size
64KB (64K x 8)
Program Memory Type
FLASH
Ram Size
4.25K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 8x8b, 8x12b; D/A 2x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
100-TQFP, 100-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051F020
Manufacturer:
SILICON
Quantity:
2
Company:
Part Number:
C8051F020
Manufacturer:
Silicon Laboratories Inc
Quantity:
10 000
Part Number:
C8051F020
Manufacturer:
CYPRESS/赛普拉斯
Quantity:
20 000
Company:
Part Number:
C8051F020-GQ
Manufacturer:
SiliconL
Quantity:
4 035
Company:
Part Number:
C8051F020-GQ
Manufacturer:
MICRON
Quantity:
200
Company:
Part Number:
C8051F020-GQ
Manufacturer:
Silicon Laboratories Inc
Quantity:
10 000
Company:
Part Number:
C8051F020-GQR
Manufacturer:
SILICON
Quantity:
3 000
Company:
Part Number:
C8051F020-GQR
Manufacturer:
Silicon Laboratories Inc
Quantity:
10 000
Part Number:
C8051F020-GQR
Manufacturer:
SIL
Quantity:
20 000
Company:
Part Number:
C8051F020DK
Manufacturer:
SiliconL
Quantity:
10
Company:
Part Number:
C8051F020R
Manufacturer:
Silicon Laboratories Inc
Quantity:
10 000
1.8.
The C8051F020/1/2/3 has an on-board 8-bit SAR ADC (ADC1) with an 8-channel input multiplexer and programma-
ble gain amplifier. This ADC features a 500 ksps maximum throughput and true 8-bit accuracy with an INL of
±1LSB. Eight input pins are available for measurement. The ADC is under full control of the CIP-51 microcontroller
via the Special Function Registers. The ADC1 voltage reference is selected between the analog power supply (AV+)
and an external VREF pin. On C8051F020/2 devices, ADC1 has its own dedicated VREF1 input pin; on
C8051F021/3 devices, ADC1 shares the VREFA input pin with the 12/10-bit ADC0. User software may put ADC1
into shutdown mode to save power.
A programmable gain amplifier follows the analog multiplexer. The gain stage can be especially useful when differ-
ent ADC input channels have widely varied input voltage signals, or when it is necessary to "zoom in" on a signal
with a large DC offset (in differential mode, a DAC could be used to provide the DC offset). The PGA gain can be set
in software to 0.5, 1, 2, or 4.
A flexible conversion scheduling system allows ADC1 conversions to be initiated by software commands, timer
overflows, or an external input signal. ADC1 conversions may also be synchronized with ADC0 software-com-
manded conversions. Conversion completions are indicated by a status bit and an interrupt (if enabled), and the
resulting 8-bit data word is latched into an SFR upon completion.
8-Bit Analog to Digital Converter
AIN1.0
AIN1.1
AIN1.2
AIN1.3
AIN1.4
AIN1.5
AIN1.6
AIN1.7
Analog Multiplexer
AMUX
8-to-1
Figure 1.12. 8-Bit ADC Diagram
Programmable Gain
X
Amplifier
External VREF
Configuration, Control, and Data Registers
+
-
AV+
AV+
Pin
Rev. 1.4
ADC
VREF
8-Bit
SAR
Start Conversion
8
C8051F020/1/2/3
ADC Data
Register
Write to AD1BUSY
Timer 3 Overflow
CNVSTR Input
Timer 2 Overflow
Write to AD0BUSY
(synchronized with
ADC0)
Conversion
Complete
Interrupt
29