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MPC5200 датащи(PDF) 33 Page - Freescale Semiconductor, Inc |
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MPC5200 датащи(HTML) 33 Page - Freescale Semiconductor, Inc |
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33 / 80 page ![]() Electrical and Thermal Characteristics MPC5200 Data Sheet, Rev. 4 Freescale Semiconductor 33 Figure 14. Timing Diagram—MUXed Mode 3.3.8 ATA The MPC5200 ATA Controller is completely software programmable. It can be programmed to operate with ATA protocols using their respective timing, as described in the ANSI ATA-4 specification. The ATA interface is completely asynchronous in nature. Signal relationships are based on specific fixed timing in terms of timing units (nano seconds). ATA data setup and hold times, with respect to Read/Write strobes, are software programmable inside the ATA Controller. Data setup and hold times are implemented using counters. The counters count the number of ATA clock cycles needed to meet the ANSI ATA-4 timing specifications. For details, see the ANSI ATA-4 specification [5] and how to program an ATA Controller and ATA drive for different ATA protocols and their respective timing. See the MPC5200 User Manual [1]. PCI CLK AD[24:0] (wr) CSx RW ALE AD[30:28] (wr) AD[26:25] (wr) AD[31,27] (wr) Address[7:31] Bank[0:1] bits TSIZ[0:2] bits ACK Data Data tenure Address tenure TS Data Data Data AD[31:0] (rd) Data t4 t13 t5 t1 Address latch t7 t6 t11 t9 t12 t10 t8 t2 t3 OE |
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