 |
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 |
|
TMS320F2811PBKA 数据表(PDF) 60 Page - Texas Instruments |
|
|
|||||||||||||||||||||||||||||
TMS320F2811PBKA 数据表(HTML) 60 Page - Texas Instruments |
|
|
60 / 174 page  8.12.5.11 External Interface Ready-on-Read Timing With One External Wait State 8.12.5.11.1 External Memory Interface Read Switching Characteristics (Ready-on-Read, 1 Wait State) PARAMETER MIN MAX UNIT td(XCOH-XZCSL) Delay time, XCLKOUT high to zone chip-select active-low 1 ns td(XCOHL-XZCSH) Delay time, XCLKOUT high/low to zone chip-select inactive-high –2 3 ns td(XCOH-XA) Delay time, XCLKOUT high to address valid 2 ns td(XCOHL-XRDL) Delay time, XCLKOUT high/low to XRD active-low 1 ns td(XCOHL-XRDH) Delay time, XCLKOUT high/low to XRD inactive-high –2 1 ns th(XA)XZCSH Hold time, address valid after zone chip-select inactive-high (1) ns th(XA)XRD Hold time, address valid after XRD inactive-high (1) ns (1) During inactive cycles, the XINTF address bus will always hold the last address put out on the bus. This includes alignment cycles. 8.12.5.11.2 External Memory Interface Read Timing Requirements (Ready-on-Read, 1 Wait State) MIN MAX UNIT ta(A) Access time, read data from address valid (LR + AR) – 14(1) ns ta(XRD) Access time, read data valid from XRD active-low AR – 12(1) ns tsu(XD)XRD Setup time, read data valid before XRD strobe inactive-high 12 ns th(XD)XRD Hold time, read data valid after XRD inactive-high 0 ns (1) LR = Lead period, read access. AR = Active period, read access. See Table 8-3. 8.12.5.11.3 Synchronous XREADY Timing Requirements (Ready-on-Read, 1 Wait State) MIN(1) MAX UNIT tsu(XRDYsynchL)XCOHL Setup time, XREADY (synchronous) low before XCLKOUT high/low 15 ns th(XRDYsynchL) Hold time, XREADY (synchronous) low 12 ns te(XRDYsynchH) Earliest time XREADY (synchronous) can go high before the sampling XCLKOUT edge 3 ns tsu(XRDYsynchH)XCOHL Setup time, XREADY (synchronous) high before XCLKOUT high/low 15 ns th(XRDYsynchH)XZCSH Hold time, XREADY (synchronous) held high after zone chip-select high 0 ns (1) The first XREADY (synchronous) sample occurs with respect to E in Figure 8-29: E = (XRDLEAD + XRDACTIVE) tc(XTIM) When first sampled, if XREADY (synchronous) is found to be high, then the access will complete. If XREADY (synchronous) is found to be low, it will be sampled again each tc(XTIM) until it is found to be high. For each sample (n), the setup time (D) with respect to the beginning of the access can be calculated as: D = (XRDLEAD + XRDACTIVE + n – 1) tc(XTIM) – tsu(XRDYsynchL)XCOHL where n is the sample number (n = 1, 2, 3, and so forth). 8.12.5.11.4 Asynchronous XREADY Timing Requirements (Ready-on-Read, 1 Wait State) MIN(1) MAX UNIT tsu(XRDYAsynchL)XCOHL Setup time, XREADY (asynchronous) low before XCLKOUT high/low 11 ns th(XRDYAsynchL) Hold time, XREADY (asynchronous) low 8 ns te(XRDYAsynchH) Earliest time XREADY (asynchronous) can go high before the sampling XCLKOUT edge 3 ns tsu(XRDYAsynchH)XCOHL Setup time, XREADY (asynchronous) high before XCLKOUT high/low 11 ns th(XRDYAsynchH)XZCSH Hold time, XREADY (asynchronous) held high after zone chip-select high 0 ns (1) The first XREADY (asynchronous) sample occurs with respect to E in Figure 8-30: E = (XRDLEAD + XRDACTIVE – 2) tc(XTIM) When first sampled, if XREADY (asynchronous) is found to be high, then the access will complete. If XREADY (asynchronous) is found to be low, it will be sampled again each tc(XTIM) until it is found to be high. For each sample, setup time from the beginning of the access can be calculated as: D = (XRDLEAD + XRDACTIVE – 3 + n) tc(XTIM) – tsu(XRDYAsynchL)XCOHL TMS320F2810, TMS320F2810-Q1, TMS320F2811, TMS320F2811-Q1 TMS320F2812, TMS320F2812-Q1 SPRS174V – APRIL 2001 – REVISED FEBRUARY 2021 www.ti.com 60 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Product Folder Links: TMS320F2810 TMS320F2810-Q1 TMS320F2811 TMS320F2811-Q1 TMS320F2812 TMS320F2812-Q1 |
|
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
