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YMF754-R 数据表(PDF) 53 Page - YAMAHA CORPORATION |
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YMF754-R 数据表(HTML) 53 Page - YAMAHA CORPORATION |
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53 / 60 page ![]() YMF754 June 28, 1999 -53- 4. AC Characteristics 4-1. Master Clock (Fig.1) Item Symbol Min. Typ. Max. Unit XI24 Cycle Time tXICYC - 40.69 - ns XI24 High Time tXIHIGH 13 - 24 ns XI24 Low Time tXILOW 13 - 24 ns Note : Top = 0-70°C, PVDD=3.3 ±0.3 V, VDD=3.3±0.3 V, CVDD=2.5±0.2 V, LVDD=2.5±0.2 V t XI24 XICYC t XIHIGH 1.0 V 1.65 V 2.3 V t XILOW Fig.1: XI24 Master Clock timing 4-2. Reset (Fig.2) Item Symbol Min. Typ. Max. Unit Reset Active Time after Power Stable tRST 1- - ms Power Stable to Reset Rising Edge tRSTOFF 10 - - ms Reset Slew Rate - 50 - - mV/ns Note : Top = 0-70°C, PVDD=3.3 ±0.3 V, VDD=3.3±0.3 V, CVDD=2.5±0.2 V, LVDD=2.5±0.2 V, C L=50 pF RST# CVDD, LVDD PVDD, VDD 2.3 V 3.0 V 0.8 V t RST t RSTOFF Fig.2: PCI Reset timing |
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