參數(shù)資料
型號(hào)： W78M64V-70SBM
廠商： WHITE ELECTRONIC DESIGNS CORP
元件分類： PROM
英文描述： 8M X 64 FLASH 3.3V PROM MODULE, 70 ns, PBGA159
封裝： 13 X 22 MM, 1.27 MM PITCH, PLASTIC, BGA-159
文件頁(yè)數(shù)： 6/54頁(yè)
文件大?。?/td> 1349K
代理商： W78M64V-70SBM
14
White Electronic Designs Corporation (602) 437-1520 www.whiteedc.com
White Electronic Designs
W78M64V-XSBX
July 2006
Rev. 4
White Electronic Designs Corp. reserves the right to change products or specications without notice.
TABLE 5. SecSiTM SECTOR ADDRESSES
Sector Size
Address Range
Device
128 words
000000h–00007Fh
Factory-Locked Area
64 words
000000h-00003Fh
Customer-Lockable Area
64 words
000040h-00007Fh
AUTOSELECT MODE
The autoselect mode provides manufacturer and device
identication, and sector protection verication, through
identier codes output on DQ7–DQ0 for each chip. This
mode is primarily intended for programming equipment
to automatically match a device to be programmed with
its corresponding programming algorithm. However, the
autoselect codes can also be accessed in-system through
the command register.
When using programming equipment, the autoselect
mode requires VID on address pin A9. Address pins
must be as shown in Table 6. In addition, when verifying
sector protection, the sector address must appear on
the appropriate highest order address bits (see Table
4). Table 6 shows the remaining address bits that are
don’t care. When all necessary bits have been set as
required, the programming equipment may then read the
corresponding identier code on DQ7–DQ0. However, the
autoselect codes can also be accessed in-system through
the command register, for instances when the device is
erased or programmed in a system without access to high
voltage on the A9 pin. The command sequence is illustrated
in Table 13. Note that if a Bank Address (BA) on address
bits A22–A20 is asserted during the third write cycle of the
autoselect command, the host system can read autoselect
data that bank and then immediately read array data from
the other bank, without exiting the autoselect mode.
To access the autoselect codes in-system, the host system
can issue the autoselect command via the command
register, as shown in Table 13. This method does not require
VID. Refer to the Autoselect Command Sequence section
for more information.
TABLE 6. AUTOSELECT CODES (HIGH VOLTAGE METHOD)
Description
CS#
OE#
WE#
A22
to
A12
A10
A9
A8
A7
A6
A5
to
A4
A3
A2
A1
A0
DQ15
to
DQ0 (each chip)
Manufacturer ID:
L
H
X
VID
X
L
X
L
0004h
Device
ID
Read
Cycle 1
LL
H
X
VID
X
L
H
227Eh
Read
Cycle 2
L
H
L
2220
Read
Cycle 3
L
H
2200h
Sector Protection
Verication
LL
H
SA
X
VID
X
L
H
L
0001h (protected),
0000h (unprotected)
SecSi Indicator Bit
(DQ7, DQ6)
LL
H
X
VID
X
L
X
L
H
00C0h (factory and
user locked)
Legend: L = Logic Low = VIL, H = Logic High = VIH, BA = Bank Address, SA = Sector Address, X = Don’t care. Note: The autoselect codes may also be accessed in-system
via command sequences
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