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MPC852T датащи(PDF) 34 Page - Freescale Semiconductor, Inc |
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MPC852T датащи(HTML) 34 Page - Freescale Semiconductor, Inc |
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34 / 80 page ![]() MPC852T Hardware Specifications, Rev. 3.1 34 Freescale Semiconductor Bus Signal Timing Table 11 shows the PCMCIA timing for the MPC852T. Table 11. PCMCIA Timing Num Characteristic 33 MHz 40 MHz 50 MHz 66 MHz Unit Min Max Min Max Min Max Min Max J82 A(0:31), REG valid to PCMCIA Strobe asserted. 1 (MIN = 0.75 x B1 - 2.00) 1 PSST = 1. Otherwise add PSST times cycle time. PSHT = 0. Otherwise add PSHT times cycle time. These synchronous timings define when the WAITA signals are detected in order to freeze (or relieve) the PCMCIA current cycle. The WAITA assertion is effective only if it is detected 2 cycles before the PSL timer expiration. See PCMCIA Interface in the MPC852T PowerQUICC User s Manual. 20.70 — 16.70 — 13.00 — 9.40 — ns J83 A(0:31), REG valid to ALE negation.1 (MIN = 1.00 x B1 - 2.00) 28.30 — 23.00 — 18.00 — 13.20 — ns J84 CLKOUT to REG valid (MAX = 0.25 x B1 + 8.00) 7.60 15.60 6.30 14.30 5.00 13.00 3.80 11.80 ns J85 CLKOUT to REG Invalid. (MIN = 0.25 x B1 + 1.00) 8.60 — 7.30 — 6.00 — 4.80 — ns J86 CLKOUT to CE1, CE2 asserted. (MAX = 0.25 x B1 + 8.00) 7.60 15.60 6.30 14.30 5.00 13.00 3.80 11.80 ns J87 CLKOUT to CE1, CE2 negated. (MAX = 0.25 x B1 + 8.00) 7.60 15.60 6.30 14.30 5.00 13.00 3.80 11.80 ns J88 CLKOUT to PCOE, IORD, PCWE, IOWR assert time. (MAX = 0.00 x B1 + 11.00) — 11.00 — 11.00 — 11.00 — 11.00 ns J89 CLKOUT to PCOE, IORD, PCWE, IOWR negate time. (MAX = 0.00 x B1 + 11.00) 2.00 11.00 2.00 11.00 2.00 11.00 2.00 11.00 ns J90 CLKOUT to ALE assert time (MAX = 0.25 x B1 + 6.30) 7.60 13.80 6.30 12.50 5.00 11.30 3.80 10.00 ns J91 CLKOUT to ALE negate time (MAX = 0.25 x B1 + 8.00) — 15.60 — 14.30 — 13.00 — 11.80 ns J92 PCWE, IOWR negated to D(0:31) invalid.1 (MIN = 0.25 x B1 - 2.00) 5.60 — 4.30 — 3.00 — 1.80 — ns J93 WAITA and WAITB valid to CLKOUT rising edge.1 (MIN = 0.00 x B1 + 8.00) 8.00 — 8.00 — 8.00 — 8.00 — ns J94 CLKOUT rising edge to WAITA and WAITB invalid.1 (MIN = 0.00 x B1 + 2.00) 2.00 — 2.00 — 2.00 — 2.00 — ns |
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