전자부품 데이터시트 검색엔진 |
|
AM29BDS640GBD9WSI 데이터시트(PDF) 17 Page - Advanced Micro Devices |
|
AM29BDS640GBD9WSI 데이터시트(HTML) 17 Page - Advanced Micro Devices |
17 / 77 page May 9, 2006 25903C2 Am29BDS640G 15 Data Sheet For optimal burst mode performance on devices without the reduced wait-state handshaking option, the host system must set the appropriate number of wait states in the flash device depending on clock frequency and the presence of a boundary crossing. See “Set Burst Mode Configuration Register Command Se- quence” section on page 26 section for more information. The device will automatically delay RDY and data by one additional clock cycle when the starting address is odd. The autoselect function allows the host system to determine whether the flash device is enabled for reduced wait-state handshaking. See the “Autoselect Com- mand Sequence” section for more information. Simultaneous Read/Write Operations with Zero Latency This device is capable of reading data from one bank of memory while program- ming or erasing in another bank of memory. An erase operation may also be suspended to read from or program to another location within the same bank (ex- cept the sector being erased). Figure 33, “Back-to-Back Read/Write Cycle Timings,” on page 70 shows how read and write cycles may be initiated for simul- taneous operation with zero latency. Refer to the DC Characteristics table for read-while-program and read-while-erase current specifications. Writing Commands/Command Sequences The device has the capability of performing an asynchronous or synchronous write operation. During a synchronous write operation, to write a command or command sequence (which includes programming data to the device and erasing sectors of memory), the system must drive AVD# and CE# to VIL, and OE# to VIH when providing an address to the device, and drive WE# and CE# to VIL, and OE# to VIH. when writing commands or data. During an asynchronous write op- eration, the system must drive CE#, WE#, and CLK to VIL and OE# to VIH when providing an address, command, and data. The asynchronous and synchronous programing operation is independent of the Set Device Read Mode bit in the Burst Mode Configuration Register. The device features an Unlock Bypass mode to facilitate faster programming. Once the device enters the Unlock Bypass mode, only two write cycles are re- quired to program a word, instead of four. An erase operation can erase one sector, multiple sectors, or the entire device. Table 8, “Programmable Wait State Settings,” on page 28 indicates the address space that each sector occupies. The device address space is divided into four banks: Banks B and C contain only 32 Kword sectors, while Banks A and D contain both 8 Kword boot sectors in addition to 32 Kword sectors. A “bank address” is the address bits required to uniquely select a bank. Similarly, a “sector address” is the address bits required to uniquely select a sector. ICC2 in the DC Characteristics table represents the active current specification for the write mode. The AC Characteristics section contains timing specification ta- bles and timing diagrams for write operations. Accelerated Program Operation The device offers accelerated program operations through the ACC function. ACC is primarily intended to allow faster manufacturing throughput at the factory. If the system asserts VID on this input, the device automatically enters the afore- mentioned Unlock Bypass mode and uses the higher voltage on the input to reduce the time required for program operations. The system would use a two- |
유사한 부품 번호 - AM29BDS640GBD9WSI |
|
유사한 설명 - AM29BDS640GBD9WSI |
|
|
링크 URL |
개인정보취급방침 |
ALLDATASHEET.CO.KR |
ALLDATASHEET 가 귀하에 도움이 되셨나요? [ DONATE ] |
Alldatasheet는? | 광고문의 | 운영자에게 연락하기 | 개인정보취급방침 | 링크교환 | 제조사별 검색 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 |