công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
|
AS4C16M16MD1 bảng dữ liệu(PDF) 36 Page - Alliance Semiconductor Corporation |
|
AS4C16M16MD1 bảng dữ liệu(HTML) 36 Page - Alliance Semiconductor Corporation |
36 / 55 page AS4C16M16MD1 256Mb MOBILE DDR SDRAM CK CK Command WRITE NOP NOP NOP PRE NOP Address BA,Col b BA,Col n BA a(or all) DQS DQ tDQSSmax tWR *2 DI b DM 1) Dl b = Data in to column b. *1 *1 *1 *1 = Don't Care 2) An interrupted burst of 4, 8 or 16 is shown, 2 data elements are written. 3) tWR is referenced from the positive clock edge after the last desired Data In pair. 4) A10 is LOW with the WRITE command (Auto Precharge is disabled) 5) *1=can be Don't Care for programmed burst length of 4 6) *2=for programmed burst length of 4, DQS becomes Don't Care at this point Figure 31 — Interrupting Write to Precharge 7.7 Precharge The PRECHARGE command (see Figure 32) is used to deactivate the open row in a particular bank or the open row in all banks. The bank(s) will be available for a subsequent row access a specified time (tRP) after the PRECHARGE command is issued. CK CK CKE CS RAS CAS WE Address A10 BA0,BA1 (High) All Banks One Bank BA = Don't Care BA=BANKAddress (if A10 = L,otherwise Don't Care) Figure 32 — Precharge command Input A10 determines whether one or all banks are to be precharged. In case where only one bank is to be precharged, inputs BA0, BA1 select the bank. Otherwise BA0, BA1 are treated as “Don’t Care”. Once a bank has been precharged, it is in the idle state and must be activated prior to any READ or WRITE command being issued. A PRECHARGE command will be treated as a NOP if there is no open row in that bank, or if the previously open row is already in the process of precharging. Mar, 28, 2013 - 36 - |
Số phần tương tự - AS4C16M16MD1 |
|
Mô tả tương tự - AS4C16M16MD1 |
|
|
Link URL |
Chính sách bảo mật |
ALLDATASHEET.VN |
Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không? [ DONATE ] |
Alldatasheet là | Quảng cáo | Liên lạc với chúng tôi | Chính sách bảo mật | Trao đổi link | Tìm kiếm theo nhà sản xuất 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 |