GENERAL DESCRIPTION
The DS80C400 network microcontroller offers the highest integration available in an 8051 device. Peripherals include a 10/100 Ethernet MAC, three serial ports, a CAN 2.0B controller, 1-Wire® Master, and 64 I/O pins.

FEATURES
■ High-Performance Architecture
    Single 8051 Instruction Cycle in 54ns
    DC to 75MHz Clock Rate
    Flat 16MB Address Space
    Four Data Pointers with Auto-Increment/
        Decrement and Select-Accelerate Data Movement
    16/32-Bit Math Accelerator
■ Multitiered Networking and I/O
    10/100 Ethernet Media Access Controller (MAC)
    CAN 2.0B Controller
    1-Wire Net Controller
    Three Full-Duplex Hardware Serial Ports
    Up to Eight Bidirectional 8-Bit Ports (64 Digital I/O Pins)
■ Robust ROM Firmware
    Supports Network Boot Over Ethernet Using DHCP and TFTP
    Full, Application-Accessible TCP/IP Network Stack
    Supports IPv4 and IPv6
    Implements UDP, TCP, DHCP, ICMP, and IGMP
    Preemptive, Priority-Based Task Scheduler
    MAC Address can Optionally be Acquired from IEEE Registered DS2502-E48
■ 10/100 Ethernet MAC
    Flexible IEEE 802.3 MII (10/100Mbps) and ENDEC
    (10Mbps) Interfaces Allow Selection of PHY
    Low-Power Operation
        Ultra-Low-Power Sleep Mode with Magic Packet®
        and Wake-Up Frame Detection
    8kB On-Chip Tx/Rx Packet Data Memory with Buffer
        Control Unit Reduces Load on CPU
    Half- or Full-Duplex Operation with Flow Control
    Multicast/Broadcast Address Filtering with VLAN Support
■ Full-Function CAN 2.0B Controller
    15 Message Centers
    Supports Standard (11-Bit) and Extended (29-Bit)
        Identifiers and Global Masks
    Media Byte Filtering to Support DeviceNet™, SDS, and
        Higher Layer CAN Protocols
    Auto-Baud Mode and SIESTA Low-Power Mode
■ Integrated Primary System Logic
    16 Total Interrupt Sources with Six External
    Four 16-Bit Timer/Counters
    2x/4x Clock Multiplier Reduces Electromagnetic Interference (EMI)
    Programmable Watchdog Timer
    Oscillator-Fail Detection
    Programmable IrDA Clock