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C8051F020-GQ

Mixed-signal 8051 MCU, 64KB flash, 12-bit ADC/DAC, 25MIPS, TQFP-100

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Manufacturer Part：

C8051F020-GQ

Package：

TQFP-100 (14 x 14 x 1 mm)

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Description

Product Overview

The C8051F020-GQ from Silicon Labs is a mixed-signal 8-bit MCU based on the 8051 core with 64KB flash, 4352 bytes RAM, 12-bit 100kSPS ADC, two 12-bit DACs, and two comparators. Running at 25MIPS in a TQFP-100 package, it provides extensive analog integration for precision mixed-signal applications.

Key Specifications

Core 8051 (pipelined, up to 25 MIPS)
Program Memory 64 KB Flash
RAM 4352 bytes (256 + 4K internal XRAM)
Max Clock Frequency 25 MIPS @ 25MHz
ADC 12-bit, 100 kSPS, 8-channel
DAC 12-bit, 2 channels
Comparators 2
I/O Pins 64
Supply Voltage 2.7V to 3.6V
Operating Temperature -40°C to +85°C

Features

  • Pipelined 8051 core delivering up to 25 MIPS at 25MHz
  • 12-bit 100kSPS ADC with 8-channel analog multiplexer
  • Dual 12-bit DACs for precision analog output generation
  • Dual comparators with programmable hysteresis and response time
  • Hardware SPI, SMBus (I2C), and UART serial interfaces
  • On-chip voltage reference and temperature sensor

Applications

  • Precision data acquisition and measurement systems
  • Industrial process control and monitoring
  • Medical instrumentation and patient monitoring
  • Automotive sensor signal conditioning
  • Audio processing and tone generation

The C8051F020-GQ from Silicon Labs is a highly integrated mixed-signal 8-bit microcontroller based on a pipelined 8051 core capable of up to 25 MIPS throughput at 25MHz. It features 64KB of in-system programmable flash, 4352 bytes of RAM (including 4KB internal XRAM), and extensive analog integration including a 12-bit 100kSPS ADC with 8-channel mux, two 12-bit DACs, and two comparators with programmable hysteresis. The device includes hardware SPI, SMBus (I2C compatible), and UART serial interfaces, along with five 16-bit timers, a programmable counter array (PCA), and 64 digital I/O pins. An on-chip voltage reference and temperature sensor further reduce external component count in precision mixed-signal applications.

The C8051F020 operates through four integrated subsystems. (1) The pipelined 8051 CPU core executes the standard 8051 instruction set with a 4-stage pipeline that allows most instructions to complete in 1-2 clock cycles (vs 12 cycles in traditional 8051), achieving 25MIPS at 25MHz. The memory interface supports 64KB flash, 256 bytes direct RAM, and 4KB internal XRAM accessed via MOVX instructions. (2) The 12-bit ADC subsystem uses a successive approximation architecture with an 8-channel analog multiplexer, achieving 100kSPS throughput with programmable conversion start and averaging modes. (3) The dual 12-bit DACs provide voltage output with programmable output range using the on-chip voltage reference, suitable for waveform generation and control loops. (4) The digital subsystem provides SPI, SMBus, and UART communication, along with the PCA for PWM generation, capture/compare, and timer functions.

Pin Group Name Function
1-8 P0.0-P0.7 Port 0 I/O (UART, SPI, PCA)
9-16 P1.0-P1.7 Port 1 I/O (ADC, comparators)
17-24 P2.0-P2.7 Port 2 I/O (EMIF, ADC)
25-32 P3.0-P3.7 Port 3 I/O (UART, SMBus, INT)
33-64 P4-P7, AIN, DAC Additional I/O, analog inputs, DAC outputs
65-100 VDD, VSS, REF, RST, etc. Power, reference, reset, and clock pins
  • Precision data acquisition systems requiring 12-bit ADC with 8-channel multiplexing
  • Industrial process control with closed-loop feedback using 12-bit ADC and DAC
  • Medical patient monitoring with multi-channel biopotential acquisition
  • Automotive sensor signal conditioning and calibration using on-chip reference
  • Audio tone generation and processing using dual 12-bit DAC outputs
Model Manufacturer Key Difference
C8051F021-GQ Silicon Labs Same with external memory interface
C8051F022-GQ Silicon Labs 10-bit ADC version, 64-pin
C8051F040-GQR Silicon Labs With CAN 2.0B, 100-pin
C8051F120-GQR Silicon Labs 100 MIPS, 128KB flash
STM32F103VCT6 STMicroelectronics ARM Cortex-M3, 12-bit ADC, 100-pin
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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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