MBM29DL64DF 데이터 시트보기 (PDF) - Fujitsu
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MBM29DL64DF Datasheet PDF : 68 Pages
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MBM29DL64DF-70
(Continued)
Command
Sequence
Bus
Write
Cycles
Req’d
First Bus Second Bus
Write Cycle Write Cycle
Addr. Data Addr. Data
Third Bus
Write Cycle
Addr. Data
Fourth Bus
Read/Write
Cycle
Addr. Data
Fifth Bus
Write Cycle
Addr. Data
Sixth Bus
Write Cycle
Addr. Data
HiddenROM Word
Program *9, *10 Byte
4
555h
AAAh
AAh
2AAh
555h
55h
555h
AAAh
A0h
(HRA)
PA
PD
HiddenROM
Exit *10
Word
Byte
4
555h
2AAh
(HRBA)
555h
AAh
55h
90h XXXh 00h
AAAh
555h
(HRBA)
AAAh
*1 : Command combinations not described in “MBM29DL64DF Command Definitions” are illegal.
*2 : Both of these reset commands are equivalent.
*3 : Erase Suspend and Erase Resume command are valid only during a sector erase operations.
*4 : This command is valid during Fast Mode.
*5 : The Reset from Fast mode command is required to return to the Read mode when the device is in Fast mode.
*6 : This command is valid while RESET = VID (except during HiddenROM mode) .
*7 : Sector Group Address (SGA) with (A6, A3, A2, A1, A0) = (0, 0, 0, 1, 0) .
*8 : The valid address are A6 to A0.
*9 : The HiddenROM Entry command is required prior to the HiddenROM programming.
*10 : This command is valid during HiddenROM mode.
*11 : The data “F0h” is also acceptable.
*12 : Fourth bus cycle becomes read cycle.
Notes : • Address bits A21 to A11 = X = “H” or “L” for all address commands except or Program Address (PA) , Sector
Address (SA) , Bank Address (BA) and Sector Group Address (SPA) .
• Bus operations are defined in “MBM29DL64DF User Bus Operations (BYTE = VIH) ” and “MBM29DL64DF
User Bus Operations (BYTE = VIL) ”.
• RA = Address of the memory location to be read
IA = Autoselect read address that sets both the bank address specified at (A21, A20, A19) and all the
other A6, A3, A2, A1, A0 and (A-1) .
PA = Address of the memory location to be programmed
Addresses are latched on the falling edge of the write pulse.
SA = Address of the sector to be erased. The combination of A21, A20, A19, A18, A17, A16, A15, A14, A13 and
A12 will uniquely select any sector.
BA = Bank Address. Address setted by A21, A20, A19 will select Bank A, Bank B, Bank C and Bank D.
• RD = Data read from location RA during read operation.
ID = Device code/manufacture code for the address located by IA.
PD = Data to be programmed at location PA. Data is latched on the rising edge of write pulse.
• SPA = Sector group address to be protected. Set sector group address and (A6, A3, A2, A1, A0) =
(0, 0, 0, 1, 0) .
• SGA = Sector Group Address. The combination of A21 to A12 will uniquely select any sector group.
SD = Sector group protection verify data. Output 01h at protected sector group addresses and output
00h at unprotected sector group addresses.
• HRA = Address of the HiddenROM area
Word Mode : 000000h to 00007Fh
Byte Mode : 000000h to 0000FFh
• HRBA = Bank Address of the HiddenROM area (A21 = A20 = A19 = VIL)
• The system should generate the following address patterns :
Word Mode : 555h or 2AAh to addresses A10 to A0
Byte Mode : AAAh or 555h to addresses A10 to A0, and A-1
• Both Read/Reset commands are functionally equivalent, resetting the device to the read mode.
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