 |
전자부품 데이터시트 검색엔진 |
|
|
전자부품 데이터시트 검색엔진 |
|
AM29PDS322DB10 데이터시트(PDF) 23 Page - SPANSION |
|
||||||||||||||||||||||||||||||
AM29PDS322DB10 데이터시트(HTML) 23 Page - SPANSION |
|
|
23 / 51 page  December 4, 2006 23569A5 Am29PDS322D 21 D A TA SH EET writes are ignored until V CC is greater than VLKO. The system must provide the proper signals to the control pins to prevent unintentional writes when V CC is greater than V LKO. Write Pulse “Glitch” Protection Noise pulses of less than 5 ns (typical) on OE#, CE# or WE# do not initiate a write cycle. Logical Inhibit Write cycles are inhibited by holding any one of OE# = V IL, CE# = VIH or WE# = VIH. To initiate a write cycle, CE# and WE# must be a logical zero while OE# is a logical one. Power-Up Write Inhibit If WE# = CE# = V IL and OE# = VIH during power up, the device does not accept commands on the rising edge of WE#. The internal state machine is automati- cally reset to the read mode on power-up. COMMAND DEFINITIONS Writing specific address and data commands or se- quences into the command register initiates device op- erations. Table 10 defines the valid register command sequences. Writing incorrect address and data val- ues or writing them in the improper sequence resets the device to reading array data. All addresses are latched on the falling edge of WE# or CE#, whichever happens later. All data is latched on the rising edge of WE# or CE#, whichever happens first. Refer to the AC Characteristics section for timing diagrams. Reading Array Data The device is automatically set to reading array data after device power-up. No commands are required to retrieve data. The device is ready to read array data after completing an Embedded Program or Embedded Erase algorithm. After the device accepts an Erase Suspend command, the device enters the erase-suspend-read mode, after which the system can read data from an y non-erase-suspended sector. After completing a pro- gramming operation in the Erase Suspend mode, the system may once again read array data with the same exception. See the Erase Suspend/Erase Resume Commands section for more information. The system must issue the reset command to return the device to the read (or erase-suspend-read) mode if DQ5 goes high during an active program or erase op- eration, or if the device is in the autoselect mode. See the next section, Reset Command, for more informa- tion. See also Requirements for Reading Array Data in the Device Bus Operations section for more information. The Read-Only Operations table provides the read pa- rameters, and Figure 15 shows the timing diagram. Reset Command Writing the reset command resets the device to the read or erase-suspend-read mode. Address bits are don’t cares for this command. The reset command may be written between the se- quence cycles in an erase command sequence before erasing begins. This resets the device to the read mode. Once erasure begins, however, the device ig- nores reset commands until the operation is complete. The reset command may be written between the sequence cycles in a program command sequence before programming begins. This resets the device to the read mode. If the program command sequence is written while the device is in the Erase Suspend mode, writing the reset command returns the device to the erase-suspend-read mode. Once programming be- gins, however, the device ignores reset commands until the operation is complete. The reset command may be written between the se- quence cycles in an autoselect command sequence. Once in the autoselect mode, the reset command must be written to return to the read mode. If the de- vice entered the autoselect mode while in the Erase Suspend mode, writing the reset command returns the device to the erase-suspend-read mode. If DQ5 goes high during a program or erase operation, writing the reset command returns the device to the read mode (or erase-suspend-read mode if the device was in Erase Suspend). Autoselect Command Sequence The autoselect command sequence allows the host system to access the manufacturer and device codes, and determine whether or not a sector is protected. Table 10 shows the address and data requirements. This method is an alternative to that shown in Table 7, which is intended for PROM programmers and re- quires V ID on address pin A9. The autoselect com- mand sequence may be written to an address that is either in the read or erase-suspend-read mode. The autoselect command may not be written while the de- vice is actively programming or erasing. The autoselect command sequence is initiated by writ- ing two unlock cycles, followed by the autoselect command. The device then enters the autoselect mode, |
유사한 부품 번호 - AM29PDS322DB10 |
|
유사한 설명 - AM29PDS322DB10 |
|
|
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 |
Korean ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
