 |
数据搜索系统，热门电子元器件搜索 |
|
|
数据搜索系统，热门电子元器件搜索 |
|
ST10F272M 数据表(PDF) 151 Page - STMicroelectronics |
|
|
|||||||||||||||||||||||||||||
ST10F272M 数据表(HTML) 151 Page - STMicroelectronics |
|
|
151 / 175 page  ST10F272M Electrical characteristics 151/176 24.8.15 External memory bus timing The following sections include the External Memory Bus timings. The given values are computed for a maximum CPU clock of 40 MHz. Note: All External Memory Bus Timings and SSC Timings listed in the following tables are granted by Design Characterization and not fully tested in production. 24.8.16 Multiplexed bus VDD = 5V ± 10%, VSS = 0V, TA = -40 to +125°C, CL = 50pF, ALE cycle time = 6 TCL + 2tA + tC + tF (75ns at 40 MHz CPU clock without wait states) Table 69. Memory cycle variables Description Symbol Values ALE Extension tA TCL x [ALECTL] Memory Cycle Time wait states tC 2TCL x (15 - [MCTC]) Memory Tri-state Time tF 2TCL x (1 - [MTTC]) Table 70. Multiplexed bus timings Symbol Parameter fCPU = 40 MHz TCL = 12.5ns Variable CPU clock 1/2 TCL = 1 to 40 MHz Unit Min Max Min Max t5 CC ALE high time 4 + tA – TCL – 8.5 + tA –ns t6 CC Address setup to ALE 1.5 + tA – TCL – 11 + tA –ns t7 CC Address hold after ALE 4 + tA – TCL – 8.5 + tA –ns t8 tCC ALE falling edge to RD, WR (with RW-delay) 4 + tA – TCL – 8.5 + tA –ns t9 CC ALE falling edge to RD, WR (no RW-delay) – 8.5 + tA – – 8.5 + tA –ns t10 CC Address float after RD, WR (with RW-delay)1 –6 – 6 ns t11 CC Address float after RD, WR (no RW-delay)1 – 18.5 – TCL + 6 ns t12 CC RD, WR low time (with RW-delay) 15.5 + tC – 2TCL – 9.5 + tC –ns t13 CC RD, WR low time (no RW-delay) 28 + tC – 3TCL – 9.5 + tC –ns t14 SR RD to valid data in (with RW-delay) –6 + tC – 2TCL – 19 + tC ns t15 SR RD to valid data in (no RW-delay) – 18.5 + tC – 3TCL – 19 + tC ns t16 SR ALE low to valid data in – 17.5 + + tA + tC – 3TCL – 20 + + tA + tC ns |
|
链接网址 |
| ALLDATASHEET是否为您带来帮助? [ DONATE ] |
关于 Alldatasheet | 广告服务 | 联系我们 | 隐私政策 | 数据表链接 | 链接交换 | 制造商名单 All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
Chinese ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
