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W6694CD芯片解密开发与技术分析

时间:2012-06-29 08:57:28

芯片解密过程中,对芯片内部结构及其加解密特征进行技术分析是解密工程师的一项必修课,因为只有充分理解芯片内部结构原理等技术信息,工程师才能准确进行方案开发,确定最可靠、成功率最高的解密方案,最大限度确保解密项目的安全可靠。
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W6694CD  FEATURES
ISDN
·Full duplex 2B+D S/T-interface transceiver compatible with ITU-T I.430 Recommendation
- Four wire operation
- Received clock recovery
- Layer 1 activation/deactivation procedure
- D channel access control
·Transparent data transmission of 2B+D channels
·Test functions
USB
·USB Specification version 1.0/1.1 compliant
·Full-speed, bus-powered USB device
·Integrated transceiver, PLL, SIE, SIL and voltage regulator
·Built-in fully automatic enumeration procedure
·Support suspend mode
- Suspend current requirement
- Wake-up by ISDN (remote) and PC (host)
Other Features
·GCI bus interface (slave mode) for connecting to ISDN U transceiver chip.
·PCM port provides two 64K clear channels to connect to PCM CODEC chips.
·B channel data switching function for selective connection between ISDN/GCI interface, USB and PCM.
·EEPROM interface for retrieving customized USB device identification data.
·IO pins with LED current drive capability.
·Reset pin for whole-chip reset.
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