データシートサーチシステム |
|
FM25V05 データシート(PDF) 9 Page - Ramtron International Corporation |
|
FM25V05 データシート(HTML) 9 Page - Ramtron International Corporation |
9 / 16 page FM25V05 - 512Kb SPI FRAM Rev. 2.0 May 2010 Page 9 of 16 Sleep Mode A low power mode called Sleep Mode is implemented on both FM25V05 and FM25VN05 devices. The device will enter this low power state when the SLEEP op-code B9h is clocked-in and a rising edge of /S is applied. Once in sleep mode, the C and D pins are ignored and Q will be high-Z, but the device continues to monitor the /S pin. On the next falling edge of /S, the device will return to normal operation within tREC (400 µs max.). The Q pin remains in a hi-Z state during the wakeup period. The device will not necessarily respond to an opcode within the wakeup period. To start the wakeup procedure, the controller may send a “dummy” read, for example, and wait the remaining tREC time. Figure 12. Sleep Mode Entry Device ID The FM25V05 and FM25VN05 devices can be interrogated for its manufacturer, product identification, and die revision. The RDID op-code 9Fh allows the user to read the manufacturer ID and product ID, both of which are read-only bytes. The JEDEC-assigned manufacturer ID places the Ramtron identifier in bank 7, therefore there are six bytes of the continuation code 7Fh followed by the single byte C2h. There are two bytes of product ID, which includes a Family code, a Density code, a Sub code, and Product Revision code. Table 6. Manufacturer and Product ID Bit 7 6 5 4 3 2 1 0 Hex Manufacturer ID 0 1 1 1 1 1 1 1 7F Continuation code 0 1 1 1 1 1 1 1 7F Continuation code 0 1 1 1 1 1 1 1 7F Continuation code 0 1 1 1 1 1 1 1 7F Continuation code 0 1 1 1 1 1 1 1 7F Continuation code 0 1 1 1 1 1 1 1 7F Continuation code 1 1 0 0 0 0 1 0 C2 JEDEC assigned Ramtron C2h in bank 7 Family Density Hex Device ID (1st Byte) 0 0 1 0 0 0 1 1 23h Density: 01h=128K, 02h=256K, 03h=512K, 04=1M Sub Rev. Rsvd Device ID (2nd Byte) 0 0 0 0 0 0 0 0 00h 00h=FM25V05, 01h=FM25VN05 Figure 13. Read Device ID S C D Q Enter Sleep Mode S C D Q 7Fh … 7Fh C2h 00h Six bytes of continuation code 7Fh 9Fh 23h 1 6 . . . . . . . |
同様の部品番号 - FM25V05 |
|
同様の説明 - FM25V05 |
|
|
リンク URL |
プライバシーポリシー |
ALLDATASHEET.JP |
ALLDATASHEETはお客様のビジネスに役立ちますか? [ DONATE ] |
Alldatasheetは | 広告 | お問い合わせ | プライバシーポリシー | リンク交換 | メーカーリスト 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 |