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AM79C960 데이터시트(PDF) 92 Page - Advanced Micro Devices |
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AM79C960 데이터시트(HTML) 92 Page - Advanced Micro Devices |
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92 / 127 page ![]() P R E L I M I N A R Y AMD 1-434 Am79C960 SWITCHING CHARACTERISTICS: BUS MASTER MODE (continued) Parameter Symbol Parameter Description Test Conditions Min Max Unit Master Mode Bus Release tMMBR1 Command Deassert to ↓ DRQ 45 65 ns tMMBR2 ↓ DRQ to ↑ DACK 0ns tMMBR3 ↓ DRQ to ↑ MASTER 40 60 ns tMMBR4 ↓ DRQ to Command, SBHE, SA0–19, LA17–23 Tristated, –15 0 ns Master Write Cycles tMMW1 SBHE, SA0–19, LA17–23, Active to ↓ MEMW (Note 1) EXTIME + 45 EXTIME + 65 ns tMMW2 MEMW Active (Note 2) MSWRA – 10 MSWRA + 5 ns tMMW3 MEMW Inactive (Note 1) EXTIME + 97 EXTIME + 105 ns tMMW4 ↑ MEMW to SBHE, SA0–19, LA17–23,SD Inactive 45 55 ns tMMW5 SBHE, SA0–19, LA17–23, SD Hold After ↑ MEMW 45 60 ns tMMW6 SBHE, SA0–19, LA17–23, SD Setup to ↓ MEMW (Note 1) EXTIME + 45 EXTIME + 55 ns tMMW7 ↓ IOCHRDY Delay From ↓ MEMW tMMW2 – 175 ns tMMW8 IOCHRDY Inactive 55 ns tMMW9 ↑ IOCHRDY to ↑ MEMW 130 ns tMMW10 SD Active to ↓ MEMW (Note 1) EXTIME + 20 EXTIME + 60 ns tMMW11 SD Setup to ↓ MEMW (Note 1) EXTIME + 20 EXTIME + 60 ns Master Read Cycles tMMR1 SBHE, SA0–19, LA17–23, Active to ↓ MEMR (Note 1) EXTIME + 45 EXTIME + 60 ns tMMR2 MEMR Active (Note 2) MSRDA – 10 MSRDA + 5 ns tMMR3 MEMR Inactive (Note 1) EXTIME + 97 EXTIME + 105 ns tMMR4 ↑ MEMR to SBHE, SA0–19, LA17–23 Inactive 45 55 ns tMMR5 SBHE, SA0–19, LA17–23 Hold After ↑ MEMW 45 55 ns tMMR6 SBHE, SA0–19, LA17–23 Setup to ↓ MEMR (Note 1) EXTIME + 45 EXTIME + 55 ns tMMR7 ↓ IOCHRDY Delay From ↓ MEMR tMMR2 – 175 ns tMMR8 IOCHRDY Inactive 55 ns tMMR9 ↑ IOCHRDY to ↑ MEMR 130 ns tMMR10 SD Setup to ↑ MEMR 30 ns tMMR11 SD Hold After ↑ MEMR 0ns |
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