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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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AM29BDS128HE8VFI 데이터시트(PDF) 48 Page - SPANSION |
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AM29BDS128HE8VFI 데이터시트(HTML) 48 Page - SPANSION |
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48 / 89 page  46 Am29BDS128H/Am29BDS640H 27024B3 May 10, 2006 D A TA SH EE T Command Definitions Table 20. Memory Array Command Definitions * For actual hexadecimal data values, refer to the note number indicated. Legend: X = Don’t care RA = Address of the memory location to be read. RD = Data read from location RA during read operation. PA = Address of the memory location to be programmed. Addresses latch on the rising edge of the AVD# pulse or active edge of CLK which ever comes first. PD = Data to be programmed at location PA. Data latches on the rising edge of WE# or CE# pulse, whichever happens first. SA = Address of the sector to be verified (in autoselect mode) or erased. Address bits Amax–A12 uniquely select any sector. BA = Address of the bank (BDS128H: A22–A20; BDS640H: A21–A19) for which command is being written. SLA = Address of the sector to be locked. Set sector address (SA) and either A6 = 1 for unlocked or A6 = 0 for locked. CR = Configuration Register address bits A19–A12. Notes: 1. See Table 1 for description of bus operations. 2. All values are in hexadecimal. 3. Shaded cells indicate read cycles. All others are write cycles. 4. Data bits DQ15–DQ8 are don’t care in command sequences, except for RD and PD. 5. Unless otherwise noted, address bits Amax–A12 are don’t cares. 6. Writing incorrect address and data values or writing them in the improper sequence may place the device in an unknown state. The system must write the reset command to return the device to reading array data. 7. No unlock or command cycles required when bank is reading array data. 8. The Reset command is required to return to reading array data (or to the erase-suspend-read mode if previously in Erase Suspend) when a bank is in the autoselect mode, or if DQ5 goes high (while the bank is providing status information) or performing sector lock/unlock. 9. The fourth cycle of the autoselect command sequence is a read cycle. The system must provide the bank address. See the Autoselect Command Sequence section for more information. 10. BDS128H: 2218h; BDS640H: 221Eh. 11. BDS128H: 2200h; BDS640H: 2201h 12. The data is 0000h for an unlocked sector and 0001h for a locked sector 13. DQ15–DQ8 = 0, DQ7: Factory Lock Bit (1 = Locked, 0 = Not Locked), DQ6: Customer Lock Bit (1 = Locked, 0 = Not Locked), DQ5: Handshake Bit (1 = Reduced wait-state Handshake, 0 = Standard Handshake), DQ4–DQ0 = 0 14. The Unlock Bypass command sequence is required prior to this command sequence. 15. The Unlock Bypass Reset command is required to return to reading array data when the bank is in the unlock bypass mode. 16. The system may read and program in non-erasing sectors, or enter the autoselect mode, when in the Erase Suspend mode. The Erase Suspend command is valid only during a sector erase operation, and requires the bank address. 17. The Erase Resume command is valid only during the Erase Suspend mode, and requires the bank address. 18. See “Set Configuration Register Command Sequence” for details. This command is unavailable in Unlock Bypass mode. 19. Command is valid when device is ready to read array data or when device is in autoselect mode. 20. The Unlock Bypass Reset command is required to exit this mode before sending any other commands to the device. The only commands that are allowed in the Unlock Bypass mode are the Entry and exit (Reset), Program, Erase, Sector Erase and CFI. Command Sequence (Notes) Bus Cycles (Notes 1–6) First Second Third Fourth Fifth Sixth Addr Data Addr Data Addr Data Addr Data Addr Data Addr Data Asynchronous Read (7) 1 RA RD Reset (8) 1 XXX F0 Manufacturer ID 4 555 AA 2AA 55 BA+555 90 BA+X00 0001 Device ID (9, 10)* 6 555 AA 2AA 55 BA+555 90 BA+X01 227E BA+X0E (10)* BA+X0F (11)* Sector Lock Verify (12)* 4 555 AA 2AA 55 SA+555 90 SA+X02 (12)* Indicator Bits (13)* 4 555 AA 2AA 55 BA+555 90 BA+X03 (13)* Program 4 555 AA 2AA 55 555 A0 PA Data Chip Erase 6 555 AA 2AA 55 555 80 555 AA 2AA 55 555 10 Sector Erase 6 555 AA 2AA 55 555 80 555 AA 2AA 55 SA 30 Entry 3 555 AA 2AA 55 555 20 Program (14, 15) 2 XX A0 PA PD Sector Erase (14, 15) 2 XX 80 SA 30 Erase (14, 15) 2 XX 80 XXX 10 CFI (14, 15) 1 XX 98 Reset (20) 2 XX 90 XXX 00 Erase Suspend (16) 1 BA B0 Erase Resume (17) 1 BA 30 Set Configuration Register (18) 3 555 AA 2AA 55 (CR)555 C0 CFI Query (19) 1 55 98 |
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