 |
поискавой системы для электроныых деталей |
|
|
поискавой системы для электроныых деталей |
|
COM20022I датащи(PDF) 63 Page - SMSC Corporation |
|
|
|||||||||||||||||||||||||||||
COM20022I датащи(HTML) 63 Page - SMSC Corporation |
|
|
63 / 83 page  10 Mbps ARCNET (ANSI 878.1) Controller with 2Kx8 On-Board RAM Datasheet SMSC COM20022I Page 63 Rev. 08-18-03 DATASHEET Figure 8.4 - Multiplexed Bus, 80XX-Like Control Signals; Write Cycle AD0-AD2, VALID nCS t1 t3 ALE VALID DATA t2, t6 t5 t4 t7 D3-D15 Note 2 t8** nWR t9 t10 nRD t13 t11 t12 t8 nIOCS16 Previous Value Invalid Valid Value t14 Note 3 t15 Parameter min max units t1 t2 t3 t4 t5 t6 t7 t8 t9 t10 t11 t12 t13 t14 t15 20 10 10 10 15 10 4TARB * 20 20 20 20 20 0 nS nS nS nS nS nS nS nS nS nS nS nS nS nS nS Address Setup to ALE Low Address Hold from ALE Low nCS Setup to ALE Low nCS Hold from ALE Low ALE Low to nDS Low Valid Data Setup to nDS High Data Hold from nDS High 30 ALE High Width ALE Low Width nWR Low Width nWR High Width nRD to nWR Low nIOCS16 Hold Delay from ALE Low nIOCS16 Output Delay from ALE Low Cycle Time (nWR to Next )** MUST BE: BUSTMG pin = HIGH 40 TARB is the Arbitration Clock Period TARB is identical to Topr if SLOW ARB = 0 * TARB is twice Topr if SLOW ARB = 1 Topr is the period of operation clock. It depends on CKUP1 and CKUP0 bits The Microcontroller typically accesses the COM20022 on every other cycle. Therefore, the cycle time specified in the microcontroller's datasheet should be doubled when considering back-to-back COM20022 cycles. Note 1: Any cycle occurring after a write to Address Pointer Low Register requires a minimum of 4TARB from the trailing edge of nWR to the leading edge of the next nWR. Note 2: ** Write cycle for Address Pointer Low Register occurring after a write to Data Register requires a minimum of 5TARB from the trailing edge of nWR to the leading edge of the next nWR. Notes 2 and 3 are applied to an access to Data Register by DMA transfer. Note 3: Write cycle for Address Pointer Low Register occurring after a read from Data Register requires a minimum of 5TARB from the trailing edge of nRD to the leading edge of nWR. |
|
ссылки URL |
| Вашему бизинису помогли Аллдатащит? [ DONATE ] |
Что такое Аллдатащит | реклама | контакт | Конфиденциальность | Ссылка на техническое описание | обмен ссыками | поиск по производителю 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 |
Russian ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
