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MPC855 データシート(PDF) 14 Page - Motorola, Inc |
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MPC855 データシート(HTML) 14 Page - Motorola, Inc |
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14 / 76 page  14 MPC860 Family Hardware Specifications MOTOROLA Bus Signal Timing The timing for the MPC860 bus shown assumes a 50-pF load for maximum delays and a 0-pF load for minimum delays. Table 9-6. Bus Operation Timings Num Characteristic 33 MHz 40 MHz 50 MHz 66 MHz Unit Min Max Min Max Min Max Min Max B1 CLKOUT period 30.30 30.30 25.00 30.30 20.00 30.30 15.15 30.30 ns B1a EXTCLK to CLKOUT phase skew (EXTCLK > 15 MHz and MF <= 2) –0.90 0.90 –0.90 0.90 –0.90 0.90 –0.90 0.90 ns B1b EXTCLK to CLKOUT phase skew (EXTCLK > 10 MHz and MF < 10) –2.30 2.30 –2.30 2.30 –2.30 2.30 –2.30 2.30 ns B1c CLKOUT phase jitter (EXTCLK > 15 MHz and MF <= 2) 1 –0.60 0.60 –0.60 0.60 –0.60 0.60 –0.60 0.60 ns B1d CLKOUT phase jitter1 –2.00 2.00 –2.00 2.00 –2.00 2.00 –2.00 2.00 ns B1e CLKOUT frequency jitter (MF < 10) 1 — 0.50 — 0.50 — 0.50 — 0.50 % B1f CLKOUT frequency jitter (10 < MF < 500) 1 — 2.00 — 2.00 — 2.00 — 2.00 % B1g CLKOUT frequency jitter (MF > 500) 1 — 3.00 — 3.00 — 3.00 — 3.00 % B1h Frequency jitter on EXTCLK 2 — 0.50 — 0.50 — 0.50 — 0.50 % B2 CLKOUT pulse width low 12.12 — 10.00 — 8.00 — 6.06 — ns B3 CLKOUT width high 12.12 — 10.00 — 8.00 — 6.06 — ns B4 CLKOUT rise time 3 — 4.00 — 4.00 — 4.00 — 4.00 ns B533 CLKOUT fall time3 — 4.00 — 4.00 — 4.00 — 4.00 ns B7 CLKOUT to A(0:31), BADDR(28:30), RD/WR, BURST, D(0:31), DP(0:3) invalid 7.58 — 6.25 — 5.00 — 3.80 — ns B7a CLKOUT to TSIZ(0:1), REG, RSV, AT(0:3), BDIP, PTR invalid 7.58 — 6.25 — 5.00 — 3.80 — ns B7b CLKOUT to BR, BG, FRZ, VFLS(0:1), VF(0:2) IWP(0:2), LWP(0:1), STS invalid 4 7.58 — 6.25 — 5.00 — 3.80 — ns B8 CLKOUT to A(0:31), BADDR(28:30) RD/WR, BURST, D(0:31), DP(0:3) valid 7.58 14.33 6.25 13.00 5.00 11.75 3.80 10.04 ns B8a CLKOUT to TSIZ(0:1), REG, RSV, AT(0:3) BDIP, PTR valid 7.58 14.33 6.25 13.00 5.00 11.75 3.80 10.04 ns B8b CLKOUT to BR, BG, VFLS(0:1), VF(0:2), IWP(0:2), FRZ, LWP(0:1), STS valid 4 7.58 14.33 6.25 13.00 5.00 11.75 3.80 10.04 ns B9 CLKOUT to A(0:31), BADDR(28:30), RD/WR, BURST, D(0:31), DP(0:3), TSIZ(0:1), REG, RSV, AT(0:3), PTR High-Z 7.58 14.33 6.25 13.00 5.00 11.75 3.80 10.04 ns |
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