PDF W78M64V-XSBX Data sheet ( Hoja de datos )

Número de pieza	W78M64V-XSBX
Descripción	Mx64 Flash 3.3V Page Mode Simultaneous Read/Write Operation Multi-Chip Package
Fabricantes	White Electronic Designs
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No Preview Available ! White Electronic Designs W78M64V-XSBX www.DataSheet4U.com 8Mx64 Flash 3.3V Page Mode Simultaneous Read/Write Operation Multi-Chip Package FEATURES Access Times of 70, 90, 100, 120ns Packaging • 159 PBGA, 13x22mm – 1.27mm pitch 1,000,000 Erase/Program Cycles per sector Page Mode • Page size is 8 words: Fast page read access from random locations within the page. Sector Architecture • Bank A (16Mb): 4Kw x 8 and 32 Kw x 31 • Bank B (48Mb): 32Kw x 96 • Bank C (48Mb): 32Kw x 96 • Bank D (16Mb): 4Kw x 8 and 3Kw x 31 Both top and bottom boot blocks Zero Power Operation Organized as 8Mx64, user conﬁgurable as 2x8Mx32 or 4x8Mx16 Commercial, Industrial and Military Temperature Ranges 3.3 Volt for read, erase and write operations Simultaneous read/write operations: • Data can be continuously read from one bank while executing erase/program functions in another bank • Zero latency between read and write operations Erase Suspend/Resume • Suspends erase operations to allow read or programming in other sectors of same bank Data Polling and Toggle Bits • Provides a software method of detecting the status of program or erase cycles Unlock Bypass Program command • Reduces overall programming time when issuing multiple program command sequences Ready/Busy# output (RY/BY#) • Hardware method for detecting program or erase cycle completion Hardware reset pin (RESET#) • Hardware method of resetting the internal state machine to the read mode WP#/ACC input pin • Write protect (WP#) function allows protection of two outermost boot sector, regardless of sector protect status • Acceleration (ACC) function accelerates program timing Persistent Sector Protection • A command sector protection method of locking combinations of individual sectors and sector groups to prevent program or erase operation within that sector Password Sector Protection or Cancellation • A sector protection method to lock combinations of individual sectors and sector groups to prevent program or erase operations within that sector using a user-deﬁned 64-bit password. * This product is subject to change without notice. White Electronic Designs Corp. reserves the right to change products or speciﬁcations without notice. December 2005 Rev. 3 1 White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com 1 page White Electronic Designs W78M64V-XSBX equivalent to tPACC. When CS# is deasserted (CS#=VIH), the reassertion of CS# for subsequent access has access time of tACC or tCS. Here again, CS# selects the device and OE# is the output control and should be used to gate data to the output inputs if the device is selected. Fast page mode accesses are obtained by keeping A22–A3 constant and changing A2–A0 to select the speciﬁc word within that page. TABLE 2. PAGE SELECT Word Word 0 Word 1 Word 2 Word 3 Word 4 Word 5 Word 6 Word 7 A2 A1 00 00 01 01 10 10 11 11 A0 0 1 0 1 0 1 0 1 SIMULTANEOUS OPERATION In addition to the conventional features (read, program, erase-suspend read, and erase-suspend program), the device is capable of reading data from one bank of memory while a program or erase operation is in progress in another bank of memory (simultaneous operation). The bank can be selected by bank addresses (A22–A20) with zero latency. The simultaneous operation can execute multi-function mode in the same bank. TABLE 3. BANK SELECT Bank Bank A Bank B Bank C Bank D A22-A20 000 001, 010, 011 100, 101, 110 111 WRITING COMMANDS/COMMAND SEQUENCES To write a command or command sequence (which includes programming data to the device and erasing sectors of memory), the system must drive WE# and CS# to VIL, and OE# to VIH. www.DataSheet4U.com The device features an Unlock Bypass mode to facilitate faster programming. Once a bank enters the Unlock Bypass mode, only two write cycles are required to program a word, instead of four. The “Word Program Command Sequence” section has details on programming data to the device using both standard and Unlock Bypass command sequences. An erase operation can erase one sector, multiple sectors, or the entire device. Table 4 indicates the address space that each sector occupies. A “bank address” is the address bits required to uniquely select a bank. Similarly, a “sector address” refers to the address bits required to uniquely select a sector. The “Command Deﬁnitions” section has details on erasing a sector or the entire chip, or suspending/ resuming the erase operation. ICC2 in the DC Characteristics table represents the active current speciﬁcation for the write mode. The AC Characteristics section contains timing speciﬁcation tables and timing diagrams for write operations. Accelerated Program Operation The device offers accelerated program operations through the ACC function. This function is primarily intended to allow faster manufacturing throughput at the factory. If the system asserts VHH on this pin, the device automatically enters the mentioned Unlock Bypass mode, temporarily unprotects any protected sectors, and uses the higher voltage on the pin to reduce the time required for program operations. The system would use a two-cycle program command sequence as required by the Unlock Bypass mode. Removing VHH from the WP#/ACC pin returns the device to normal operation. Note that VHH must not be asserted on WP#/ACC for operations other than accelerated programming, or device damage may result. In addition, the WP#/ACC pin should be raised to VCC when not in use. That is, the WP#/ACC pin should not be left ﬂoating or unconnected; inconsistent behavior of the device may result. Autoselect Functions If the system writes the autoselect command sequence, the device enters the autoselect mode. The system can then read autoselect codes from the internal register (which is separate from the memory array) on DQ63–DQ0. Standard read cycle timings apply in this mode. Refer to the Autoselect Mode and Autoselect Command Sequence sections for more information. White Electronic Designs Corp. reserves the right to change products or speciﬁcations without notice. December 2005 Rev. 3 5 White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com 5 Page White Electronic Designs W78M64V-XSBX www.DataSheet4U.com TABLE 4. SECTOR ARCHITECTURE Bank Sector Sector Address (A22-A12) Sector Size (Kwords) Address Range (x16) SA159 10011000XXX 32 4C0000h–4C7FFFh SA160 10011001XXX 32 4C8000h–4CFFFFh SA161 10011010XXX 32 4D0000h–4D7FFFh SA162 10011011XXX 32 4D8000h–4DFFFFh SA163 10011100XXX 32 4E0000h–4E7FFFh SA164 10011101XXX 32 4E8000h–4EFFFFh SA165 10011110XXX 32 4F0000h–4F7FFFh SA166 10011111XXX 32 4F8000h–4FFFFFh SA167 10100000XXX 32 500000h–507FFFh SA168 10100001XXX 32 508000h–50FFFFh SA169 10100010XXX 32 510000h–517FFFh SA170 10100011XXX 32 518000h–51FFFFh SA171 10100100XXX 32 520000h–527FFFh SA172 10100101XXX 32 528000h–52FFFFh SA173 10100110XXX 32 538000h–53FFFFh SA175 10101000XXX 32 540000h–547FFFh SA176 10101001XXX 32 548000h–54FFFFh SA177 10101010XXX 32 550000h–557FFFh SA178 10101011XXX 32 558000h–15FFFFh SA179 10101100XXX 32 560000h–567FFFh SA180 10101101XXX 32 568000h–56FFFFh SA181 10101110XXX 32 570000h–577FFFh SA182 10101111XXX 32 578000h–57FFFFh SA183 10110000XXX 32 580000h–587FFFh SA184 10110001XXX 32 588000h–58FFFFh SA185 10110010XXX 32 590000h–597FFFh SA186 10110011XXX 32 598000h–59FFFFh SA187 10110100XXX 32 5A0000h–5A7FFFh SA188 10110101XXX 32 5A8000h–5AFFFFh SA189 10110110XXX 32 5B0000h–5B7FFFh SA190 10110111XXX 32 5B8000h–5BFFFFh SA191 10111000XXX 32 5C0000h–5C7FFFh SA192 10111001XXX 32 5C8000h–5CFFFFh SA193 10111010XXX 32 5D0000h–5D7FFFh SA194 10111011XXX 32 5D8000h–5DFFFFh SA195 10111100XXX 32 5E0000h–5E7FFFh SA196 10111101XXX 32 5E8000h–5EFFFFh SA197 10111110XXX 32 5F0000h–5F7FFFh SA198 10111111XXX 32 5F8000h–5FFFFFh White Electronic Designs Corp. reserves the right to change products or speciﬁcations without notice. December 2005 Rev. 3 11 White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com 11 Page

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