поискавой системы для электроныых деталей |
|
M27V402-150K6TR датащи(PDF) 9 Page - STMicroelectronics |
|
M27V402-150K6TR датащи(HTML) 9 Page - STMicroelectronics |
9 / 13 page 9/13 M27V405 Warning: compatibility with Flash Memory Compatibility issues may arise when replacing the compatible Single Supply 4 Mbit Flash Memory (the M29F040) by the M27V405. The VPP pin of the M27V405 corresponds to the "W" pin of the M29F040. The M27V405 VPP pin can withstand voltages up to 12.75V, while the "W" pin of the M29F040 is a normal control signal input and may be damaged if a high voltage is applied; special precautions must be taken when program- ming in-circuit. However if an already programmed M27V405 is used, this can be directly put in place of the Flash Memory as the VPP input, when not in program- ming mode, is set to VCC or VSS. Changes to PRESTO II. The duration of the pro- gramming pulse is reduced to 20µs, making the programming time of the M27V405 comparable with the counterpart Flash Memory. Electronic Signature The Electronic Signature (ES) mode allows the reading out of a binary code from an OTP EPROM that will identify its manufacturer and type. This mode is intended for use by programming equip- ment to automatically match the device to be pro- grammed with its corresponding programming algorithm. This mode is functional in the 25°C ± 5°C ambient temperature range that is required when programming the M27V405. To activate the ES mode, the programming equipment must force 11.5V to 12.5V on address line A9 of the M27V405 with VPP=VCC=5V. Two identifier bytes may then be sequenced from the device outputs by toggling address line A0 from VIL to VIH. All other address lines must be held at VIL during Electronic Signa- ture mode. Byte 0 (A0=VIL) represents the manu- facturer code and byte 1 (A0=VIH) the device identifier code. For the STMicroelectronics M27V405, these two identifier bytes are given in Table 4 and can be read-out on outputs Q0 to Q7. Figure 7. Programming Flowchart AI00760B n = 0 Last Addr VERIFY E = 100 µs Pulse ++n = 25 ++ Addr VCC = 6.25V, VPP = 12.75V FAIL CHECK ALL BYTES 1st: VCC = 6V 2nd: VCC = 4.2V YES NO YES NO YES NO Figure 8. On-Board Programming Flowchartt AI01349 n = 0 Last Addr VERIFY ? E = 10 µs Pulse ++n = 25 ++ Addr VPP = 12.75V FAIL CHECK ALL BYTES VPP = VCC YES NO YES NO YES NO SET MARGIN MODE E = 10 µs Pulse |
Аналогичный номер детали - M27V402-150K6TR |
|
Аналогичное описание - M27V402-150K6TR |
|
|
ссылки URL |
Конфиденциальность |
ALLDATASHEETRU.COM |
Вашему бизинису помогли Аллдатащит? [ DONATE ] |
Что такое Аллдатащит | реклама | контакт | Конфиденциальность | 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 |