Atmel AT91SAM9G20-EK User Manual page 14

Board Description
•
Power Management Controller (PMC)
– Very Slow Clock Operating Mode, Software Programmable Power Optimization Capabilities
– Two Programmable External Clock Signals
•
Advanced Interrupt Controller (AIC)
– Individually Maskable, Eight-level Priority, Vectored Interrupt Sources
– Three External Interrupt Sources and One Fast Interrupt Source, Spurious Interrupt Protected
•
Debug Unit (DBGU)
– 2-wire UART and Support for Debug Communication Channel, Programmable ICE Access Prevention
•
Periodic Interval Timer (PIT)
– 20-bit Interval Timer plus 12-bit Interval Counter
•
Watchdog Timer (WDT)
– Key-protected, Programmable Only Once, Windowed 16-bit Counter Running at Slow Clock
•
Real-time Timer (RTT)
– 32-bit Free-running Backup Counter Running at Slow Clock with 16-bit Prescaler
•
One 4-channel 10-bit Analog-to-Digital Converter
•
Three 32-bit Parallel Input/Output Controllers (PIOA, PIOB, PIOC)
– 96 Programmable I/O Lines Multiplexed with up to Two Peripheral I/Os
– Input Change Interrupt Capability on Each I/O Line
– Individually Programmable Open-drain, Pull-up Resistor and Synchronous Output
– All I/O Lines are Schmitt Trigger Inputs
•
Peripheral DMA Controller Channels (PDC)
•
One Two-slot MultiMedia Card Interface (MCI)
– SDCard/SDIO and MultiMediaCard
– Automatic Protocol Control and Fast Automatic Data Transfers with PDC
•
One Synchronous Serial Controller (SSC)
– Independent Clock and Frame Sync Signals for Each Receiver and Transmitter
– I²S Analog Interface Support, Time Division Multiplex Support
– High-speed Continuous Data Stream Capabilities with 32-bit Data Transfer
•
Four Universal Synchronous/Asynchronous Receiver Transmitters (USART)
– Individual Baud Rate Generator, IrDA
Encoding/Decoding
– Support for ISO7816 T0/T1 Smart Card, Hardware Handshaking, RS485 Support
– Full Modem Signal Control on USART0
•
Two 2-wire UARTs
•
Two Master/Slave Serial Peripheral Interfaces (SPI)
– 8- to 16-bit Programmable Data Length, Four External Peripheral Chip Selects
– Synchronous Communications
•
Two Three-channel 16-bit Timer/Counters (TC)
– Three External Clock Inputs, Two Multi-purpose I/O Pins per Channel
– Double PWM Generation, Capture/Waveform Mode, Up/Down Capability
– High-Drive Capability on Outputs TIOA0, TIOA1, TIOA2
•
One Two-wire Interface (TWI)
– Compatible with Standard Two-wire Serial Memories
– One, Two or Three Bytes for Slave Address
– Sequential Read/Write Operations
– Master, Multi-master and Slave Mode Operation
– Bit Rate: Up to 400 Kbits
– General Call Supported in Slave Mode
– Connection to Peripheral DMA Controller (PDC) Channel Capabilities Optimizes Data Transfers in
Master Mode
3-2
6413C–ATARM–18-Feb-09
™
Compliant
®
Infrared Modulation/Demodulation, Manchester
AT91SAM9G20-EK Evaluation Board User Guide