The CY27EE16ZE integrates a 16-kbit EEPROM scratchpadand a clock generator that features Cypress’s programmableclock core. An industry standard I2C serial programminginterface (SPI) is used to program the scratchpad and clockcore.16-kbit EEPROMThe 16-kbit EEPROM scratchpad is organized in eight blocksx 256 words x 8 bits. Each of the eight 2-kbit EEPROMscratchpad blocks, a 2-kbit clock configuration EEPROMblock, and a 2-kbit volatile clock configuration SRAM block,have their own 7-bit device address. The device address iscombined with a Read/Write bit as the LSB and is sent aftereach start bit.Clock FeaturesThe programmable clock core is configured with the followingfeatures:• Crystal Oscillator: Programmable drive and load, support for external references up to 166 MHz. See \"Reference Frequency (REF)\", page 5• VCX Analog or digital control• Inputs and I/Os: Programmable input muxes drive write protect (WP), analog VCXO control, output enable (OE), and power down mode (PDM) functions• PLL: Programmable P, Q, offset, and loop filter parameters.Outputs: Six outputs and two programmable linear dividers.The output swing of CLOCK1 through CLOCK4 is set by VDDL(2.5V or 3.3V). The output swing of CLOCK5 and CLOCK6 isset by VDD (3.3V).
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