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: 13/178页
文件大小: 2247K
代理商: SCD223110QCD
Intelligent Two-Channel LAN and WAN Communications Controller — CD2231
Datasheet
11
1.1
Benefits
Substantially reduced host CPU overhead means more channels and faster overall throughput.
No time-critical host software enables faster and easier software development.
Figure 1. Functional Block Diagram
RAM
HOST
BUS
INTERFACE
LOGIC
FIRMWARE
ROM
PROPRIETARY
RISC
PROCESSOR
2 SERIAL
INTERFACE
CHANNELS
HOST
INTERFACE
MODEM
RECEIVE/CRC
TRANSMIT/CRC
TIMER/BRG/DPLL
ON-CHIP
DMA
CONTROLLER
AND
INTERFACE
LOGIC
MODEM
RECEIVE/CRC
TRANSMIT/CRC
TIMER/BRG/DPLL
Features
CD2231
CD2401
CD2431
CD2481
Number of serial channels
2
4
Interrupt on-chip DMA mechanism
1
√√
FIFO depth (per channel and per
direction)
16
Data size (bits)
5-8
ASYNC
√√
Downloaded 2
SDLC/HDLC
√√
Downloaded
X.21, bisync
Downloaded
Async-HDLC, PPP
Downloaded
SLIP
(Revision D)
(Revision D)
Downloaded
MNP 4
(Revision D)
(Revision D)
Downloaded
Serial data rate (kbits/second)
2563,4
134.4
230.4
Number of modem leads
(per channel, including RxD and
TxD)
10
On-chip timers
√√
UNIX character processing5
√√
Downloaded
In-band Rx flow control
(Revision D)
(Revision D)
Downloaded
Special character Tx and recognition
√√
Downloaded
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