Programmable Four-channel Communications Controller

The CD2481 is a four-channel synchronous/asynchronous Communications controller specifically designed to reduce host-system processing overhead and increase efficiency in a wide variety of Communications applications. A special member of the CD24X1 family, the device allows easy field upgrades and enhancement with an on-chip 8K-word microcode store for downloaded control code. The CD2481 is packaged in a 100-pin MQFP package that offers 10 data Clock modem pins per channel. The device has four fully independent serial channels to support standard asynchronous, PPP, MNP4, SLIP, bit-synchronous (HDLC), and byte- synchronous (bisync, X.21) protocols. The device is non-functional until the microcode is downloaded; only a small boot ROM with code to perform device initialization is included. The device is based on a proprietary on-chip RISC processor that performs all the time-critical, low-level tasks otherwise performed by the host system. The CD2481 boosts system efficiency with eight on-chip DMA channels, on-chip FIFOs (16 bytes/direction), intelligent vectored interrupts, and intelligent protocol processing. The on-chip DMA controller provides fire-and-forget transmit support the host need only inform the CD2481 of the location of the packet to send. Similarly, on receive, the CD2481 automatically receives a complete packet with no host intervention or assistance. The DMA controller also has a transmit Append mode for use in asynchronous applications. The DMA controller uses a dual-buffer scheme that easily implements simple or complex Buffer schemes. Each channel and direction in the dual-buffer scheme has two active Buffers The CD2481 CAN be programmed to interrupt the host at the completion of a frame or Buffer In applications where Buffers are of a small, fixed size, the dual-buffer scheme allows large frames to be divided into multiple Buffers By Intel Corporation
CD2481 's PackagesCD2481 's pdf datasheet

CD2481 Pinout, Pinouts
CD2481 pinout,Pin out
This is one package pinout of CD2481,If you need more pinouts please download CD2481's pdf datasheet.

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