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MPC852T Datasheet(PDF) 18 Page - Freescale Semiconductor, Inc |
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MPC852T Datasheet(HTML) 18 Page - Freescale Semiconductor, Inc |
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18 / 80 page  MPC852T PowerQUICC™ Hardware Specifications, Rev. 4 18 Freescale Semiconductor Bus Signal Timing B29b CS negated to D(0:31), DP(0:3), High Z GPCM write access, ACS = 00, TRLX = 0,1 and CSNT = 0 (MIN = 0.25 × B1 – 2.00) 5.60 — 4.30 — 3.00 — 1.80 — ns B29c CS negated to D(0:31), DP(0:3) High-Z GPCM write access, TRLX = 0, CSNT = 1, ACS = 10, or ACS = 11 EBDF = 0 (MIN = 0.50 × B1 – 2.00) 13.20 — 10.50 — 8.00 — 5.60 — ns B29d WE(0:3)/BS_B[0:3] negated to D(0:31), DP(0:3) High-Z GPCM write access, TRLX = 1, CSNT = 1, EBDF = 0 (MIN = 1.50 × B1 – 2.00) 43.50 — 35.50 — 28.00 — 20.70 — ns B29e CS negated to D(0:31), DP(0:3) High-Z GPCM write access, TRLX = 1, CSNT = 1, ACS = 10, or ACS = 11 EBDF = 0 (MIN = 1.50 × B1 – 2.00) 43.50 — 35.50 — 28.00 — 20.70 — ns B29f WE(0:3/BS_B[0:3]) negated to D(0:31), DP(0:3) High Z GPCM write access, TRLX = 0, CSNT = 1, EBDF = 1 (MIN = 0.375 × B1 – 6.30)8 5.00 — 3.00 — 1.10 — 0.00 — ns B29g CS negated to D(0:31), DP(0:3) High-Z GPCM write access, TRLX = 0, CSNT = 1 ACS = 10 or ACS = 11, EBDF = 1 (MIN = 0.375 × B1 – 6.30)8 5.00 — 3.00 — 1.10 — 0.00 — ns B29h WE(0:3)/BS_B[0:3] negated to D(0:31), DP(0:3) High Z GPCM write access, TRLX = 1, CSNT = 1, EBDF = 1 (MIN = 0.375 × B1 – 3.30) 38.40 — 31.10 — 24.20 — 17.50 — ns B29i CS negated to D(0:31), DP(0:3) High-Z GPCM write access, TRLX = 1, CSNT = 1, ACS = 10 or ACS = 11, EBDF = 1 (MIN = 0.375 × B1 – 3.30) 38.40 — 31.10 — 24.20 — 17.50 — ns B30 CS, WE(0:3)/BS_B[0:3] negated to A(0:31), BADDR(28:30) Invalid GPCM write access 9 (MIN = 0.25 × B1 – 2.00) 5.60 — 4.30 — 3.00 — 1.80 — ns B30a WE(0:3)/BS_B[0:3] negated to A(0:31), BADDR(28:30) Invalid GPCM, write access, TRLX = 0, CSNT = 1, CS negated to A(0:31) invalid GPCM write access TRLX = 0, CSNT =1 ACS = 10, or ACS == 11, EBDF = 0 (MIN = 0.50 × B1 – 2.00) 13.20 — 10.50 — 8.00 — 5.60 — ns 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 |
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