8-bit Microcontroller

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The C8051F320 MCU features an on-board universal serial bus (USB) 2.0 function controller with an integrated transceiver and on-chip clock recovery. No external resistors, crystal, voltage regulator, EEPROM or other components are required for USB applications. The MCU includes a powerful 8051 core with 25 MHz performance along with 16 kB Flash, 2.25 kB RAM. On-chip analog features include a 10-bit, 17-ch., 200 ksps ADC, voltage reference, a ±1.5 internal oscillator, 2 comparators and a temperature sensor. Integrating additional communication interfaces along with rich analog in a 7x7 mm, QFP32, the C8051F320 provides a truly single-chip solution for embedded USB applications.

Symmetry Electronics is an authorized Silicon Labs distributor.


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Analog Peripherals
- 10-Bit ADC
Up to 200 ksps
Up to 17 or 13 external single-ended or differential inputs
VREF from external pin, internal reference, or VDD
Built-in temperature sensor
External conversion start input
- Two Comparators
- Internal Voltage Reference
- POR/Brown-Out Detector
USB Function Controller
- USB specification 2.0 compliant
- Full speed (12 Mbps) or low speed (1.5 Mbps) operation
- Integrated clock recovery; no external crystal required for full speed or low speed
- Supports eight flexible endpoints
- 1 kB USB buffer memory
- Integrated transceiver; no external resistors required
On-Chip Debug
- On-chip debug circuitry facilitates full speed, non-intrusive in-system debug (no emulator required)
- Provides breakpoints, single stepping, inspect/modify memory and registers
- Superior performance to emulation systems using ICE-chips, target pods, and sockets
Voltage Regulator Input: 4.0 to 5.25 V
High Speed 8051 C Core
- Pipelined instruction architecture; executes 70% of instructions in 1 or 2 system clocks
- Up to 25 MIPS throughput with 25 MHz clock
- Expanded interrupt handler
- 2304 bytes internal RAM (1k + 256 + 1k USB FIFO)
- 16 kB Flash; In-system programmable in 512-byte sectors
Digital Peripherals
- 25/21 Port I/O; All 5 V tolerant with high sink current
- Hardware enhanced SPI, enhanced UART, and SMBus serial ports
- Four general purpose 16-bit counter/timers
- 16-bit programmable counter array (PCA) with five
capture/compare modules
- Real time clock mode using external clock source and PCA or timer
Clock Sources
- Internal Oscillator: 0.25% accuracy with clock recovery enabled. Supports all USB and UART modes
- External oscillator: Crystal, RC, C, or Clock (1 or 2 pin modes)
- Can switch between clock sources on-the-fly; useful in power saving strategies
RoHS Compliant Packages
- 32-pin LQFP (C8051F320)
- 28-pin QFN (C8051F321)
Temperature Range: 40 to +85 C

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8-bit Microcontroller