System Overview
The C8051F52x/F52xA/F53x/F53xA family of devices are fully integrated, low power, mixed-signal systemon-a-chip MCUs. Highlighted features are listed below. Refer to Table 1.1 for specific product feature selection.

■ High-speed pipelined 8051-compatible microcontroller core (up to 25 MIPS)
■ In-system, full-speed, non-intrusive debug interface (on-chip)
■ True 12-bit 200 ksps ADC with analog multiplexer and up to 16 analog inputs
■ Precision programmable 24.5 MHz internal oscillator that is within ±0.5% across the temperature range and for VDD voltages greater than or equal to the on-chip voltage regulator minimum output at the low setting. The oscillator is within +1.0% for VDD voltages below this minimum output setting.
■ Up to 7680 bytes of on-chip Flash memory
■ 256 bytes of on-chip RAM
■ Enhanced UART, and SPI serial interfaces implemented in hardware
■ LIN 2.1 peripheral (fully backwards compatible, master and slave modes)
■ Three general-purpose 16-bit timers
■ Programmable Counter/Timer Array (PCA) with three capture/compare modules and Watchdog Timer function
■ On-chip Power-On Reset, VDD Monitor, and Temperature Sensor
■ On-chip Voltage Comparator
■ Up to 16 Port I/O

Analog Peripherals
    - 12-Bit ADC
        • Programmable throughput up to 200 ksps
        • Up to 6/16 external inputs
        • Data dependent windowed interrupt generator
        • Built-in temperature sensor
    - Comparator
        • Programmable hysteresis and response time
        • Configurable as wake-up or reset source
        • Low current
    - POR/Brownout Detector
    - Voltage Reference—1.5 and 2.2 V (programmable)
On-Chip Debug
    - On-chip debug circuitry facilitates full-speed, nonintrusive in-system debug (No emulator required)
    - Provides breakpoints, single stepping
    - Inspect/modify memory and registers
    - Complete development kit
Supply Voltage 2.0 to 5.25 V
    - Built-in LDO regulator
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 system clock
    - Expanded interrupt handler
Memory
    - 8/4/2 kB Flash; In-system byte programmable in 512 byte sectors
    - 256 bytes internal data RAM
Digital Peripherals
    - 16/6 port I/O; push-pull or open-drain, 5 V tolerant
    - Hardware SPI™, and UART serial port
    - LIN 2.1 Controller (Master and Slave capable); no crystal required
    - Three general purpose 16-bit counter/timers
    - Programmable 16-bit counter/timer array with three capture/compare modules, WDT
Clock Sources
    - Internal oscillators: 24.5 MHz ±0.5% accuracy supports UART and LIN-Master operation
    - External oscillator: Crystal, RC, C, or Clock (1 or 2 pin modes)
    - Can switch between clock sources on-the-fly
Packages
    - 10-Pin DFN (3 x 3 mm)
    - 20-pin QFN (4 x 4 mm)
    - 20-pin TSSOP
Automotive Qualified
    - Temperature Range: –40 to +125 °C
    - Compliant to AEC-Q100