 |
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 |
|
ST92F124 数据表(PDF) 144 Page - STMicroelectronics |
|
|
|||||||||||||||||||||||||||||
ST92F124 数据表(HTML) 144 Page - STMicroelectronics |
|
|
144 / 429 page  144/429 ST92F124/F150/F250 - EXTERNAL MEMORY INTERFACE (EXTMI) EXTERNAL MEMORY SIGNALS (Cont’d) 8.2.5 PORT 0 If Port 0 is used as a bit programmable parallel I/O port, it has the same features as a regular port. When set as an Alternate Function, it is used as the External Memory interface: it outputs the mul- tiplexed Address (8 LSB: A[7:0]) / Data bus D[7:0]. 8.2.6 PORT 1 If Port 1 is used as a bit programmable parallel I/O port, it has the same features as a regular port. When set as an Alternate Function, it is used as the external memory interface to provide the ad- dress bits A[15:8]. 8.2.7 PORT 9 [7:2] If Port 9 is available and used as a bit programma- ble I/O port, it has the same features as a regular port. If the MMU is available on the device and Port 9 is set as an Alternate Function, Port 9[7:2] is used as the external memory interface to provide the 6 MSB of the address (A[21:16]). Note: For the ST92F250 device, since A[18:17] share the same pins as SDA1 and SCL1 of I²C_1, these address bits are not available when the I²C_1 is in use (when I2CCR.PE bit is set). Figure 74. Application Example (MC=0) Figure 75. Application Example (MC=1) RAM 2 Mbytes G E A[20:0] A[20:8] ST9 DS P9[6:2], P1 Q[7:0] P0 W RW D[7:0] AS OE LE Q[7:0] D[7:0] LATCH A21 DS Q[7:0] A[20:0] E ROM 2 Mbytes P9.7 A[7:0] RAM 2 Mbytes G E A[20:0] A[20:8] ST9 OEN P9[6:2], P1 Q[7:0] P0 W WEN D[7:0] ALE OE LE Q[7:0] D[7:0] LATCH A21 DS Q[7:0] A[20:0] E ROM 2 Mbytes P9.7 A[7:0] 9 |
|
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
