Document Outline

• Features
• Description
• Typical Applications
• Block Diagram
• Pin Description
  • Pinouts
  • Signals
  • Internal Pin Structure
• Clock Controller
  • Oscillator
  • X2 Feature
  • PLL
  • Registers
• Program/Code Memory
  • ROM Memory Architecture
  • Flash Memory Architecture
  • Hardware Security System
  • Boot Memory Execution
  • Preventing Flash Corruption
  • Registers
  • Hardware Bytes
• Data Memory
  • Internal Space
  • External Space
  • Dual Data Pointer
  • Registers
• Special Function Registers
• Interrupt System
  • Interrupt System Priorities
  • External Interrupts
  • Registers
• Power Management
  • Reset
  • Reset Recommendation to Prevent Flash Corruption
  • Idle Mode
  • Power-down Mode
  • Registers
• Timers/Counters
  • Timer/Counter Operations
  • Timer Clock Controller
  • Timer 0
  • Timer 1
  • Interrupt
  • Registers
• Watchdog Timer
  • Description
  • Watchdog Clock Controller
  • Watchdog Operation
  • Registers
• MP3 Decoder
  • Decoder
  • Audio Controls
  • Decoding Errors
  • Frame Information
  • Ancillary Data
  • Interrupt
  • Registers
• Audio Output Interface
  • Description
  • Clock Generator
  • Data Converter
  • Audio Buffer
  • MP3 Buffer
  • Interrupt Request
  • MP3 Song Playing
  • Voice or Sound Playing
  • Registers
• Universal Serial Bus
  • Description
  • Configuration
  • Read/Write Data FIFO
  • Bulk/Interrupt Transactions
  • Control Transactions
  • Isochronous Transactions
  • Miscellaneous
  • Suspend/Resume Management
  • USB Interrupt System
  • Registers
• MultiMedia Card Controller
  • Card Concept
  • Bus Concept
  • Description
  • Clock Generator
  • Command Line Controller
  • Data Line Controller
  • Interrupt
  • Registers
• IDE/ATAPI Interface
  • Description
  • Registers
• Serial I/O Port
  • Mode Selection
  • Baud Rate Generator
  • Synchronous Mode (Mode 0)
  • Asynchronous Modes (Modes 1, 2 and 3)
  • Multiprocessor Communication (Modes 2 and 3)
  • Automatic Address Recognition
  • Interrupt
  • Registers
• Synchronous Peripheral Interface
  • Description
  • Interrupt
  • Configuration
  • Registers
• Two-wire Interface (TWI) Controller
  • Description
  • Registers
• Analog to Digital Converter
  • Description
  • Registers
• Keyboard Interface
  • Description
  • Registers
• Electrical Characteristics
  • Absolute Maximum Rating
  • DC Characteristics
  • AC Characteristics
  • SPI Interface
• Ordering Information
• Package Information
  • TQFP80
  • BGA81
  • PLCC84
• Datasheet Change Log for AT8xC51SND1C
  • Changes from 4109D- 10/02 to 4109E-06/03