W155 generator equivalent, spread spectrum frequency timing generator.
* Generates a spread spectrum timing signal (SYSCLK) and a non-spread signal (USBCLK)
* Requires a 14.318-MHz crystal for operation
* Supports MIPS microproce.
USB Clock Output/Modulation Width Selection Input: When an input; if spread spectrum feature is enabled, this pin is used to select the amount of frequency variation on the SYSCLK output (see Table 2). Wider variations result in greater peak EMI redu.
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