전자부품 데이터시트 검색엔진 |
|
AM28F020A-90EC 데이터시트(PDF) 17 Page - Advanced Micro Devices |
|
AM28F020A-90EC 데이터시트(HTML) 17 Page - Advanced Micro Devices |
17 / 35 page Am28F020A 17 DQ5 Exceeded Timing Limits DQ5 will indicate if the program or erase time has exceeded the specified limits. This is a failure condi- tion and the device may not be used again (internal pulse count exceeded). Under these conditions DQ5 will produce a “1.” The program or erase cycle was not successfully completed. Data# Polling is the only op- erating function of the device under this condition. The CE# circuit will partially power down the device under these conditions (to approximately 2 mA). The OE# and WE# pins will control the output disable functions as described in the Command Definitions table in the corresponding device data sheet. Parallel Device Erasure The Embedded Erase algorithm greatly simplifies par- allel device erasure. Since the erase process is internal to the device, a single erase command can be given to multiple devices concurrently. By implementing a paral- lel erase algorithm, total erase time may be minimized. Note that the Flash memories may erase at different rates. If this is the case, when a device is completely erased, use a masking code to prevent further erasure (over-erasure). The other devices will continue to erase until verified. The masking code applied could be the read command (00h). Power-Up/Power-Down Sequence The device powers-up in the Read only mode. Power supply sequencing is not required. Note that if VCC ≤ 1.0 Volt, the voltage difference between VPP and VCC should not exceed 10.0 Volts. Also, the device has a rise VPP rise time and fall time specification of 500 ns minimum. Reset Command The Reset command initializes the Flash memory de- vice to the Read mode. In addition, it also provides the user with a safe method to abort any device operation (including program or erase). The Reset must be written two consecutive times after the Setup Program command (10h or 50h). This will reset the device to the Read mode. Following any other Flash command, write the Reset command once to the device. This will safely abort any previous operation and initialize the device to the Read mode. The Setup Program command (10h or 50h) is the only command that requires a two-sequence reset cycle. The first Reset command is interpreted as program data. However, FFh data is considered as null data during pro- gramming operations (memory cells are only pro- grammed from a logical “1" to “0"). The second Reset command safely aborts the programming operation and resets the device to the Read mode. Memory contents are not altered in any case. CE# tOEH WE# OE# Data DQ0–DQ7 DQ6 = DQ6 = DQ6 Stop Toggling DQ0–DQ7 Valid tOE * 17502D-11 Note: *DQ6 stops toggling (The device has completed the Embedded operation.) Figure 6. AC Waveforms for Toggle Bit during Embedded Algorithm Operations |
유사한 부품 번호 - AM28F020A-90EC |
|
유사한 설명 - AM28F020A-90EC |
|
|
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 |