 |
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 |
|
H8/3003 数据表(PDF) 130 Page - Renesas Technology Corp |
|
|
|||||||||||||||||||||||||||||
H8/3003 数据表(HTML) 130 Page - Renesas Technology Corp |
|
|
130 / 715 page  6.3.3 Data Bus The H8/3003 allows either 8-bit access or 16-bit access to be designated for each of areas 0 to 7. An 8-bit-access area uses the upper data bus (D15 to D8). A 16-bit-access area uses both the upper data bus (D15 to D8) and lower data bus (D7 to D0). In read access the RD signal applies without distinction to both the upper and lower data bus. In write access the HWR signal applies to the upper data bus, and the LWR signal applies to the lower data bus. Table 6-4 indicates how the two parts of the data bus are used under different access conditions. Table 6-4 Access Conditions and Data Bus Usage Access Read/ Valid Upper Data Bus Lower Data Bus Area Size Write Address Strobe (D15 to D8)(D7 to D0) — Read — RD Valid Invalid Write — HWR Undetermined data Byte Read Even RD Valid Invalid Odd Invalid Valid Write Even HWR Valid Undetermined data Odd LWR Undetermined data Valid Word Read — RD Valid Valid Write — HWR, LWR Valid Valid Note: Undetermined data means that unpredictable data is output. Invalid means that the bus is in the input state and the input is ignored. 8-bit-access area 16-bit-access area 112 |
|
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
