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M58BW016DB Datasheet(PDF) 25 Page - STMicroelectronics |
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M58BW016DB Datasheet(HTML) 25 Page - STMicroelectronics |
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25 / 69 page ![]() M58BW016DT, M58BW016DB, M58BW016FT, M58BW016FB Bus operations 25/69 Table 7. Burst Configuration Register Bit Description Value Description M15 Read Select 0 Synchronous Burst Read 1 Asynchronous Read (default at power-on) M14 0 Reserved (default value) M13-M11 X-Latency(1) 1. X latencies can be calculated as: (tAVQV – tLLKH + tQVKH) + tSYSTEM MARGIN < (X -1) tK. (X is an integer number from 4 to 8, tK is the clock period and tSYSTEM MARGIN is the time margin required for the calculation). 000 Reserved (default value) 001 Reserved 010 Reserved 011 5, 5-1-1-1, 5-2-2-2 100 6, 6-1-1-1, 6-2-2-2 101 7, 7-1-1-1, 7-2-2-2 110 8, 8-1-1-1, 8-2-2-2 111 Reserved M10 0 Reserved (default value) M9 Y-Latency(2) 2. Y latencies can be calculated as: tKHQV + tSYSTEM MARGIN + tQVKH < Y tK. 0 One Burst Clock cycle (default value) 1 Two Burst Clock cycles M8 Valid Data Ready 0 R valid Low during valid Burst Clock edge (default value) 1 R valid Low 1 data cycle before valid Burst Clock edge M7 Burst Type 0 Interleaved (default value) 1 Sequential M6 Valid Clock Edge 0 Falling Burst Clock edge (default value) 1 Rising Burst Clock edge M5-M4 00 Reserved (default value) 01 Reserved 10 Reserved 11 Reserved M3 Wrapping 0 Wrap (default value) 1 No wrap M2-M0 Burst Length 000 Reserved (default value) 001 4 double-words 010 8 double-words 011 Reserved 100 Reserved 101 Reserved 110 Reserved 111 Continuous |
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