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AT89C5131AM Features：
80C52X2 Core (6 Clocks per Instruction)
– Maximum Core Frequency 48 MHz in X1 Mode, 24MHz in X2 Mode
– Dual Data Pointer
– Full-duplex Enhanced UART (EUART)
– Three 16-bit Timer/Counters: T0, T1 and T2
– 256 Bytes of Scratchpad RAM
16/32-Kbyte On-chip Flash In-System Programming through USB
– Byte and Page (128 bytes) Erase and Write
– 100k Write Cycles
4-Kbyte EEPROM for Bootloader (3-Kbyte) and Data (1-Kbyte)
– Byte and Page (128 bytes) Erase and Write
– 100k Write Cycles
On-chip Expanded RAM (ERAM): 1024 Bytes
Integrated Power Monitor (POR/PFD) to Supervise Internal Power Supply
USB 1.1 and 2.0 Full Speed Compliant Module with Interrupt on Transfer Completion
– Endpoint 0 for Control Transfers: 32-byte FIFO
– 6 Programmable Endpoints with In or Out Directions and with Bulk, Interrupt or
Isochronous Transfers
Endpoint 1, 2, 3: 32-byte FIFO
Endpoint 4, 5: 2 x 64-byte FIFO with Double Buffering (Ping-pong Mode)
Endpoint 6: 2 x 512-byte FIFO with Double Buffering (Ping-pong Mode)
– Suspend/Resume Interrupts
– 48 MHz PLL for Full-speed Bus Operation
– Bus Disconnection on Microcontroller Request
5 Channels Programmable Counter Array (PCA) with 16-bit Counter, High-speed
Output, Compare/Capture, PWM and Watchdog Timer Capabilities
? Programmable Hardware Watchdog Timer (One-time Enabled with Reset-out): 100 ms
to 3s at 8 MHz
Keyboard Interrupt Interface on Port P1 (8 Bits)
TWI (Two Wire Interface) 400Kbit/s
SPI Interface (Master/Slave Mode)
34 I/O Pins
4 Direct-drive LED Outputs with Programmable Current Sources: 2-6-10 mA Typical
4-level Priority Interrupt System (11 sources)
Idle and Power-down Modes
0 to 24 MHz On-chip Oscillator with Analog PLL for 48 MHz Synthesis
Industrial Temperature Range
Extended Range Power Supply: 2.7V to 5.5V (3.3V to 5.5V required for USB)
Packages: PLCC52, VQFP64, QFN32
