 |
поискавой системы для электроныых деталей |
|
|
поискавой системы для электроныых деталей |
|
LAN9211 датащи(PDF) 129 Page - SMSC Corporation |
|
|
|||||||||||||||||||||||||||||
LAN9211 датащи(HTML) 129 Page - SMSC Corporation |
|
|
129 / 147 page  High-Performance Small Form Factor Single-Chip Ethernet Controller with HP Auto-MDIX Support Datasheet SMSC LAN9211 129 Revision 2.9 (03-01-12) DATASHEET 6.2 PIO Reads PIO reads can be used to access CSRs or RX Data and RX/TX status FIFOs. In this mode, counters in the CSRs are latched at the beginning of the read cycle. Read data is valid as indicated in the timing diagram. PIO reads can be performed using Chip Select (nCS) or Read Enable (nRD). Either or both of these control signals must go high between cycles for the period specified. Note: Some registers have restrictions on the timing of back-to-back, write-read and read-read cycles. Note: The “Data Bus” width is 16 bits Note: A PIO Read cycle begins when both nCS and nRD are asserted. The cycle ends when either or both nCS and nRD are deasserted. They may be asserted and deasserted in any order. Figure 6.1 PIO Read Cycle Timing Table 6.3 PIO Read Timing SYMBOL DESCRIPTION MIN TYP MAX UNITS tcycle Read Cycle Time 45 ns tcsl nCS, nRD Assertion Time 32 ns tcsh nCS, nRD Deassertion Time 13 ns tcsdv nCS, nRD Valid to Data Valid 30 ns tasu Address Setup to nCS, nRD Valid 0 ns tah Address Hold Time 0 ns tdon Data Buffer Turn On Time 0 ns tdoff Data Buffer Turn Off Time 7 ns tdoh Data Output Hold Time 0 ns Data Bus nCS, nRD A[7:1] |
|
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
