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MPC859TZP100 数据表(PDF) 23 Page - Freescale Semiconductor, Inc |
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MPC859TZP100 数据表(HTML) 23 Page - Freescale Semiconductor, Inc |
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23 / 92 page  MOTOROLA MPC866/859 Hardware Specifications 23 Bus Signal Timing B37 UPWAIT valid to CLKOUT falling edge 8 (MIN = 0.00 x B1 + 6.00) 6.00 — 6.00 — 6.00 — 6.00 — ns B38 CLKOUT falling edge to UPWAIT valid8 (MIN = 0.00 x B1 + 1.00) 1.00 — 1.00 — 1.00 — 1.00 — ns B39 AS valid to CLKOUT rising edge 9 (MIN = 0.00 x B1 + 7.00) 7.00 — 7.00 — 7.00 — 7.00 — ns B40 A(0:31), TSIZ(0:1), RD/WR, BURST, valid to CLKOUT rising edge (MIN = 0.00 x B1 + 7.00) 7.00 — 7.00 — 7.00 — 7.00 — ns B41 TS valid to CLKOUT rising edge (setup time) (MIN = 0.00 x B1 + 7.00) 7.00 — 7.00 — 7.00 — 7.00 — ns B42 CLKOUT rising edge to TS valid (hold time) (MIN = 0.00 x B1 + 2.00) 2.00 — 2.00 — 2.00 — 2.00 — ns B43 AS negation to memory controller signals negation (MAX = TBD) — TBD — TBD — TBD — TBD ns 1 For part speeds above 50 MHz, use 9.80 ns for B11a. 2 The timing required for BR input is relevant when the MPC866/859 is selected to work with the internal bus arbiter. The timing for BG input is relevant when the MPC866/859 is selected to work with the external bus arbiter. 3 For part speeds above 50 MHz, use 2 ns for B17. 4 The D(0:31) and DP(0:3) input timings B18 and B19 refer to the rising edge of CLKOUT, in which the TA input signal is asserted. 5 For part speeds above 50 MHz, use 2 ns for B19. 6 The D(0:31) and DP(0:3) input timings B20 and B21 refer to the falling edge of CLKOUT. This timing is valid only for read accesses controlled by chip-selects under control of the UPM in the memory controller, for data beats, where DLT3 = 1 in the UPM RAM words. (This is only the case where data is latched on the falling edge of CLKOUT.) 7 The timing B30 refers to CS when ACS = 00 and to WE(0:3) when CSNT = 0. 8 The signal UPWAIT is considered asynchronous to CLKOUT and synchronized internally.The timings specified in B37 and B38 are specified to enable the freeze of the UPM output signals as described in Figure 20. 9 The AS signal is considered asynchronous to CLKOUT. The timing B39 is specified in order to allow the behavior specified in Figure 23. Table 9. Bus Operation Timings (continued) Num Characteristic 33 MHz 40 MHz 50 MHz 66 MHz Unit Min Max Min Max Min Max Min Max Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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