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TS81102G0VTP 数据表(PDF) 6 Page - ATMEL Corporation |
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TS81102G0VTP 数据表(HTML) 6 Page - ATMEL Corporation |
6 / 38 page 6 TS81102G0 2105C–BDC–11/03 Asynchronous Reset (ASYNCRESET) Figure 5. Asynchronous Reset The Asynchronous Reset is a master reset of the port selection, which works on TTL levels. It is active on the high level. During an asynchronous reset, the clock must be in a known state. It is used to start the DMUX. When it is active, it paralyzes the outputs (the output clock and output data remain at the same level as before the asynchronous reset). When it comes back to its low level, the DMUX starts: the outputs are active and the first processed data is on port A. Synchronous Reset (SYNCRESET) Figure 6. Synchronous Reset The DMUX can be synchronously reset to a programmable state depending on the conversion ratio. The clock must not be stopped during reset. The synchronization signal is a clock (SyncRest) whose frequency is FS/8*n where n is an integer (n = 1,2,3,…) in 1:8 mode and FS/4*n in 1:4 mode. The front edge of this clock is synchronized with Clkln inside the DMUX, and generates a 200 ps reset pulse. This reset pulse occurs during a fixed level of Clkln. If the DMUX was synchronized with Syncreset previous to a possible loss of synchronization, then the output data is immediately correct, no modification can be seen at the output of the DMUX, and no data is lost (“Internal Timing Diagram” on page 3). If the DMUX was not synchronized with SyncReset previous to a possible loss of synchroniza- tion, then the output data and data ready of the DMUX are changed. The output data is correct after a number of input clocks corresponding to the pipeline delay (“Timing Diagrams with Syn- chronous Reset” on page 19). AsyncReset Port B selected Port A selected Port C selected Port D selected Port E selected Port F selected Port G selected Port H selected CLKIN FS DR/2 SyncReset = FS/8 Port B selected Port A selected Port C selected Port D selected Port E selected Port F selected Port G selected Port H selected Internal reset pulse |
类似零件编号 - TS81102G0VTP |
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类似说明 - TS81102G0VTP |
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