cy8c9560芯片解密

     cy8c9560芯片解密，首先需要对cy8c9560芯片的主要特征及其加解密性质进行一定程度的了解，这对于芯片解密工程师来说，能够帮助其更好的选择合适的解密方案，确保解密的成功率和可靠性，对于客户来说，能够帮助其更好的对芯片解密项目合作进行技术理解和分析，更好的把握自己的解密项目进展。
     因此，下面，我们首先为大家提供对cy8c9560芯片等CY8C95系列单片机的简单介绍，供技术参考分析。
    The CY8C95xx is a multi-port I/O expander with on-board useravailable EEPROM and several PWM outputs. All devices in this family operate identically but differ in I/O pins, number of PWMs, and internal EEPROM size.
　　The CY8C95xx operates as two I2C slave devices. The first device is a multi-port I/O expander (single I2C address to access all ports via registers). The second device is a serial EEPROM. Dedicated configuration registers can be used to disable the EEPROM. The EEPROM utilizes 2-byte addressing to support the 28-Kbyte EEPROM address space. The selected device is defined by the most significant bits of the I2C address or by specific register addressing.
　　The I/O expander's data pins can be independently assigned as inputs, outputs, quasi-bidirectional input/outputs or PWM ouputs. The individual data pins can be configured as open drain/collector, strong drive (10 mA source, 25 mA sink), resistively pulled-up/-down, or high-impedance. The factory default configuration is pulled-up internally.
　　The system master writes to the I/O configuration registers via the I2C bus. Configuration and output register settings can be stored as user defaults in a dedicated section of the EEPROM.If user defaults have been stored in EEPROM, they are restored to the ports at power-up. While this device can share the bus with SMBus devices, it can only communicate with I2C-masters.
　　There is one dedicated pin that is configured as an interrupt output(INT) and can be connected to the interrupt logic of the system master. This signal can inform the system master that there is incoming data on its ports or that the PWM output state was changed.
　　The EEPROM is byte-readable and supports byte-by-byte writing.A pin can be configured as an EEPROM Write Disable (WD) input that blocks write operations when set high. The configuration registers can also disable EEPROM operations.
　　The CY8C95xx has one fixed address pin (A0) and up to six additional pins (A1-A6) which allow up to 128 devices to share a common two-wire I2C data bus. The Extendable Soft Addressing algorithm provides the option to choose the number of pins needed to assign the desired address. Pins not used for address bits are available as GPIO pins.
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