 |
전자부품 데이터시트 검색엔진 |
|
|
전자부품 데이터시트 검색엔진 |
|
S29CD032G0JQAI002 데이터시트(PDF) 39 Page - SPANSION |
|
||||||||||||||||||||||||||||||
S29CD032G0JQAI002 데이터시트(HTML) 39 Page - SPANSION |
|
|
39 / 87 page  November 14, 2005 S29CD-G_00_B0 S29CD-G Flash Family 37 Pr el im i n a r y works in conjunction with the Password Mode Locking Bit, which when set, prevents the Password Verify command from reading the contents of the password on the pins of the device. Write Protect (WP#) The device features a hardware protection option using a write protect pin that prevents program- ming or erasing, regardless of the state of the sector’s Persistent or Dynamic Protection Bits. The WP# pin is associated with the two outermost 8Kbytes sectors in the 75% bank. The WP# pin has no effect on any other sector. When WP# is taken to VIL, programming and erase operations of the two outermost 8 Kbytes sectors in the 75% bank are disabled. By taking WP# back to VIH, the two outermost 8 Kbytes sectors are enabled for program and erase operations, depending upon the status of the individual sector Persistent or Dynamic Protection Bits. If either of the two outermost sectors Persistent or Dynamic Protection Bits are programmed, program or erase op- erations are inhibited. If the sector Persistent or Dynamic Protection Bits are both erased, the two sectors are available for programming or erasing as long as WP# remains at VIH. The user must hold the WP# pin at either VIH or VIL during the entire program or erase operation of the two outermost sectors in the 75% bank. Secured Silicon OTP Sector and Simultaneous Operation The Secured Silicon Sector is 256 Kbytes and is located in the Small Bank. For S29CD016G and S29CD032G devices. Spansion programs and permanently locks the Secured Silicon sector with Unique device identification. Please contact your sales representative for the Electronic Marking information. Since the Secured Silicon is permanent protected by Spansion, during Simultaneous Operation, the Secured Silicon sector cannot be erased or reprogrammed. Persistent Protection Bit Lock The Persistent Protection Bit (PPB) Lock is a volatile bit that reflects the state of the Password Mode Locking Bit after power-up reset. If the Password Mode Locking Bit is set, which indicates the device is in Password Protection Mode, the PPB Lock Bit is also set after a hardware reset (RE- SET# asserted) or a power-up reset. The ONLY means for clearing the PPB Lock Bit in Password Protection Mode is to issue the Password Unlock command. Successful execution of the Password Unlock command clears the PPB Lock Bit, allowing for sector PPBs modifications. Asserting RE- SET#, taking the device through a power-on reset, or issuing the PPB Lock Bit Set command sets the PPB Lock Bit back to a 1. If the Password Mode Locking Bit is not set, indicating Persistent Sector Protection Mode, the PPB Lock Bit is cleared after power-up or hardware reset. The PPB Lock Bit is set by issuing the PPB Lock Bit Set command. Once set the only means for clearing the PPB Lock Bit is by issuing a hard- ware or power-up reset. The Password Unlock command is ignored in Persistent Sector Protection Mode. Hardware Data Protection The command sequence requirement of unlock cycles for programming or erasing provides data protection against inadvertent writes. In addition, the following hardware data protection mea- sures prevent accidental erasure or programming, which might otherwise be caused by spurious system level signals during VCC power-up and power-down transitions, or from system noise. Low VCC Write Inhibit When VCC is less than VLKO, the device does not accept any write cycles. This protects data during VCC power-up and power-down. The command register and all internal erase/program circuits are disabled, and the device resets. Subsequent writes are ignored until VCC is greater than VLKO. The |
유사한 부품 번호 - S29CD032G0JQAI002 |
|
유사한 설명 - S29CD032G0JQAI002 |
|
|
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
