System Overview
C8051F93x-C8051F92x devices are fully integrated mixed-signal System-on-a-Chip MCUs. Highlighted features are listed below. Refer to Table 2.1 for specific product feature selection and part ordering numbers.

• Single/Dual Battery operation with on-chip dc-dc boost converter.
• High-speed pipelined 8051-compatible microcontroller core (up to 25 MIPS)
• In-system, full-speed, non-intrusive debug interface (on-chip)
• True 10-bit 300 ksps 23-channel single-ended ADC with analog multiplexer
• 6-Bit Programmable Current Reference
• Precision programmable 24.5 MHz internal oscillator with spread spectrum technology.
• 64 kB or 32 kB of on-chip Flash memory
• 4352 bytes of on-chip RAM
• SMBus/I2C, Enhanced UART, and two Enhanced SPI serial interfaces implemented in hardware
• Four general-purpose 16-bit timers
• Programmable Counter/Timer Array (PCA) with six capture/compare modules and
   Watchdog Timer function
• On-chip Power-On Reset, VDD Monitor, and Temperature Sensor
• Two On-chip Voltage Comparators with 23 Touch Sense inputs.
• 24 or 16 Port I/O (5 V tolerant)

Supply Voltage 0.9 to 3.6 V
- One-Cell Mode supports 0.9 to 1.8 V operation
- Two-Cell Mode supports 1.8 to 3.6 V operation
- Built-in dc-dc converter with 1.8 to 3.3 V output for use in one-cell mode
- Built-in LDO regulator allows a high analog supply voltage and low digital core voltage
- 2 built in supply monitors (brownout detectors)

10-Bit Analog to Digital Converter
- ±1 LSB INL; no missing codes
- Programmable throughput up to 300 ksps
- Up to 23 external inputs
- On-Chip Voltage Reference
- On-Chip PGA allows measuring voltages up to twice the reference voltage
- 16-bit Auto-Averaging Accumulator with Burst Mode
   provides increased ADC resolution
- Data dependent windowed interrupt generator
- Built-in temperature sensor

Two Comparators
- Programmable hysteresis and response time
- Configurable as wake-up or reset source
- Up to 23 Capacitive Touch Sense Inputs

6-Bit Programmable Current Reference
- Up to ±500 µA. Can be used as a bias or for
   generating a custom reference voltage

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

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
- 4352 bytes internal data RAM (256 + 4096)
- 64 kB (‘F93x) or 32 kB (‘F92x) Flash; In-system programmable
   in 1024-byte sectors—1024 bytes are
   reserved in the 64 kB devices

Digital Peripherals
- 24 or 16 port I/O; All 5 V tolerant with high sink 
   current and programmable drive strength-Hardware
   SMBus™ (I2C™ Compatible), 2 x SPI™, and UART
   serial ports available concurrently
- Four general purpose 16-bit counter/timers
- Programmable 16-bit counter/timer array with six
   capture/compare modules and watchdog timer
- Hardware SmaRTClock operates down to 0.9 V and
   requires less than 0.5 µA supply current

Clock Sources
- Internal oscillators: 24.5 MHz, 2% accuracy
   supports UART operation; 20 MHz low power
   oscillator requires very little bias current
- External oscillator: Crystal, RC, C, or CMOS Clock
- SmaRTClock oscillator: 32 kHz Crystal or internal
   self-oscillate mode
- Can switch between clock sources on-the-fly; useful
   in implementing various power saving modes

Packages
- 32-pin QFN (5 x 5 mm)
- 24-pin QFN (4 x 4 mm)
- 32-pin LQFP (7 x 7 mm, easy to hand-solder)

Temperature Range: –40 to +85 °C