Analog Peripherals
10-Bit ADC
    - ±1 LSB INL; no missing codes
    - Programmable throughput up to 200 ksps
    - Up to 13 external inputs; programmable as single-ended or differential
    - Built-in temperature sensor (±3 °C)
Two Comparators
Internal Voltage Reference: 2.4 V
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 either fullspeed or low-speed operation
    - Supports eight flexible endpoints
    - Dedicated 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, registers, and USB memory
    - Superior performance to emulation systems using ICE-chips, target pods, and sockets
Operating Voltage: 2.7 to 5.25 V
Temperature Range: –40 to +85 °C
High-Speed 8051 µC 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
Memory
    - 1280 bytes data RAM
    - 16 kB Flash; in-system programmable in 512-byte sectors (512 bytes are reserved)
Digital Peripherals
    - 21 port I/O; all are 5 V tolerant
    - Hardware SMBus™ (I2C™ compatible), SPI™, and UART serial ports available concurrently
    - Programmable 16-bit counter/timer array with five capture/compare modules
    - 4 general-purpose 16-bit counter/timers
Clock Sources
    - Internal oscillator: 0.25% accuracy with clock recovery enabled; supports all USB and UART modes
    - External oscillator: Crystal, RC, C, or Clock
    - On-chip clock multiplier for USB controller
Voltage Regulator
    - On-chip voltage regulator supports USB bus-powered operation
    - Regulator bypass mode supports USB self-powered operation
Package
    - 28-pin QFN (lead-free package)a-93619-pass