参数资料
型号: SCD223110QCD
厂商: INTEL CORP
元件分类: 微控制器/微处理器
英文描述: 2 CHANNEL(S), 256K bps, SERIAL COMM CONTROLLER, PQFP100
封装: METRIC, QFP-100
文件页数: 2/178页
文件大小: 2247K
代理商: SCD223110QCD
CD2231 — Intelligent Two-Channel LAN and WAN Communications Controller
10
Datasheet
Enhanced features for UNIX environment
— Character expansion in transmit (for example, sending <LF> will be expanded to <CR>
<LF> automatically)
— Programmable translation of receiving character with error to different pattern (for
example, character with parity error can be translated into FFh, 00h, character on the
system side)
— Flow-control transparency and LNext
Programmable timer closely coupled with character reception, especially for asynchronous
receive DMA operation
Automatic baud rate detection — single carriage return
DMA Controller Features
DMA or interrupt selectable per channel and per direction
Dual Configuration register sets to reduce realtime constraints
Append and Block mode DMA
Chain/unchain of long frames into multiple buffers
32-bit address and 8- or 16-bit data transfer
Programmable gap in buffers following a receive character exception
Other Features
Improved interrupt schemes
— Vectored interrupts per channel allow direct jump into proper service routines
— Good Data
interrupts eliminate need for status checks
Easily cascadable for multiple-device configurations
16-byte receive and transmit FIFOs
Local and Remote Maintenance Loopback modes
Two independent bit-rate generators per channel for transmit and receive
On-chip NRZ (nonreturn-to-zero), NRZI (nonreturn-to-zero inverted), and Manchester data
encoding and decoding
DPLL (digital phase locked loop) on each receiver
Two independent timers per channel
Byte-endian-orientation selection pin allows easy interface to 80X86 and 680X0 processors
Eight clock/modem control signals per channel (in addition to TxD and RxD) on CD2231
Compatible with the CD24XX family of communication controllers
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