 |
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 |
|
H8S/2240 数据表(PDF) 206 Page - Renesas Technology Corp |
|
|
|||||||||||||||||||||||||||||
H8S/2240 数据表(HTML) 206 Page - Renesas Technology Corp |
|
|
206 / 818 page  Section 6 Bus Controller Rev.3.00 Mar. 26, 2007 Page 164 of 772 REJ09B0355-0300 6.5.5 Wait Control When accessing external space, the H8S/2245 Group can extend the bus cycle by inserting one or more wait states (T w). There are two ways of inserting wait states: (1) program wait insertion and (2) pin wait insertion using the WAIT pin. (1) Program Wait Insertion From 0 to 3 wait states can be inserted automatically between the T 2 state and T3 state on an individual area basis in 3-state access space, according to the settings of WCRH and WCRL. (2) Pin Wait Insertion Using WAIT WAIT WAIT WAIT Pin Setting the WAITE bit in BCRL to 1 enables wait insertion by means of the WAIT pin. Program wait insertion is first carried out according to the settings in WCRH and WCRL. Then, if the WAIT pin is low at the falling edge of φ in the last T 2 or Tw state, a Tw state is inserted. If the WAIT pin is held low, T w states are inserted until it goes high. This is useful when inserting four or more T w states, or when changing the number of Tw states for different external devices. The WAITE bit setting applies to all areas. |
|
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
