 |
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 |
|
PC87309VLJ 数据表(PDF) 63 Page - National Semiconductor (TI) |
|
|
|
|||||||||||||||||||||||||||||
PC87309VLJ 数据表(HTML) 63 Page - National Semiconductor (TI) |
|
|
63 / 192 page  The Floppy Disk Controller (FDC) (Logical Device 0) 63 www.national.com 01: Perpendicular. (500 Kbps) 10: Conventional. 11: Perpendicular. (1 or 2 Mbps) Bits 5-2 -Drive 3-0 Mode Configuration (DC3-0) If bits 1,0 are both 0, and bit 7 is 1, these bits configure logical drives 3-0 as conventional or perpendicular. Bits 5-2 (DC3–0) correspond to logical drives 3-0, respec- tively. These bits are not affected by a software reset. 0: Conventional drive. (Default) It is not necessary to issue the FORMAT TRACK command for conventional drives. 1: Perpendicular drive. Bit 7 - Overwrite (OW) This bit enables or disables changes in the mode of the logical drives by bits 5-2. 0: Changes in mode of logical drives via bits 5-2 are ignored. (Default) 1: Changes enabled. Execution Phase Internal registers are written. Result Phase None. TABLE 3-14. Effect of Drive Mode and Data Rate on FORMAT TRACK and WRITE DATA Commands TABLE 3-15. Effect of GDC Bits on FORMAT TRACK and WRITE DATA Commands Data Rates Drive Mode Length of Gap 2 in FORMAT TRACK Command Portion of Gap 2 Rewritten in WRITE DATA Command 250, 300 or 500 Kbps Conventional Perpendicular 22 bytes 22 bytes 0 bytes 19 bytes 1 or 2 Mbps Conventional Perpendicular 22 bytes 41 bytes 0 bytes 38 bytes GDC Bits Drive Mode Length of Gap 2 in FORMAT TRACK Command Portion of Gap 2 Rewritten in WRITE DATA Command 1 0 0 0 Conventional 22 bytes 0 bytes 0 1 Perpendicular ( ≤500 Kbps) 22 bytes 19 bytes 1 0 Conventional 22 bytes 0 bytes 1 1 Perpendicular (1 or 2 Mbps) 41 bytes 38 bytes |
|
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
