Analog Peripherals
10-Bit ADC

• Up to 200 ksps
• Built-in analog multiplexer with single-ended and
• differential mode
• VREF from external pin, internal reference, or VDD
• Built-in temperature sensor
• External conversion start input option

Two comparators
Internal voltage reference
Brown-out detector and POR Circuitry

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 Supply Input: 2.7 to 5.25 V

• Voltages from 3.6 to 5.25 V supported using On-Chip Voltage Regulator

HIgh Speed 8051 μC Core

• Pipelined instruction architecture; executes 70% of Instructions in 1 or 2 system clocks
• 48 MIPS and 25 MIPS versions available.
• Expanded interrupt handler

Memory

• 4352 or 2304 Bytes RAM
• 64 or 32 kB Flash; In-system programmable in 512-byte sectors

Digital Peripherals

• 40/25 Port I/O; All 5 V tolerant with high sink current
• Hardware enhanced SPI™, SMBus™, and one or two enhanced UART serial ports
• Four general purpose 16-bit counter/timers
• 16-bit programmable counter array (PCA) with five capture/ compare modules
• External Memory Interface (EMIF)

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)
• Low Frequency (80 kHz) Internal Oscillator
• Can switch between clock sources on-the-fly

Packages

• 48-pin TQFP (C8051F340/1/4/5)
• 32-pin LQFP (C8051F342/3/6/7)

Temperature Range: –40 to +85 °C