參數(shù)資料
型號(hào)： S29WS128J0PBAW002
廠商： SPANSION LLC
元件分類： PROM
英文描述： 8M X 16 FLASH 1.8V PROM, 55 ns, PBGA84
封裝： 8 X 11.60 MM, FBGA-84
文件頁(yè)數(shù)： 9/97頁(yè)
文件大?。?/td> 2421K
代理商： S29WS128J0PBAW002
May 11, 2006 S29WS-J_00_A6
S29WS128J/064J
17
D a ta
Sh eet
An erase operation can erase one sector, multiple sectors, or the entire device. Table 12, “WS128J
dicate the address space that each sector occupies. The device address space is divided into four
banks. A “bank address” is the address bits required to uniquely select a bank. Similarly, a “sector
address” is the address bits required to uniquely select a sector.
ICC2 in the “DC Characteristics” section on page 70 represents the active current specification for
the write mode. The AC Characteristics section contains timing specification tables and timing di-
agrams for write operations.
Accelerated Program Operation
The device offers accelerated program operations through the ACC function. ACC is primarily in-
tended to allow faster manufacturing throughput at the factory.
If the system asserts VHH on this input, the device automatically enters the aforementioned Un-
lock Bypass mode and uses the higher voltage on the input 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 ACC input returns the device to normal op-
eration. Note that sectors must be unlocked prior to raising ACC to VHH. Note that the ACC pin
must not be at VHH for operations other than accelerated programming, or device damage may
result. In addition, the ACC pin must not be left floating or unconnected; inconsistent behavior of
the device may result.
When at VIL, ACC locks all sectors. ACC should be at VIH for all other conditions.
Autoselect Mode
The autoselect mode provides manufacturer and device identification, and sector protection ver-
ification, through identifier codes output from the internal register (which is separate from the
memory array) on DQ15–DQ0. 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. Ad-
In addition, when verifying sector protection, the sector address must appear on the appropriate
the remaining address bits that are don’t care. When all necessary bits have been set as re-
quired, the programming equipment may then read the corresponding identifier code on DQ15–
DQ0. However, the autoselect codes can also be accessed in-system through the command reg-
ister, 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 18, “Command Definitions,”
on page 60. Note that if a Bank Address (BA) on address bits A22, A21, and A20 for the WS128J
(A21:A19 for the WS064J) 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 18, “Command Definitions,” on page 60. This
method does not require VID. Autoselect mode may only be entered and used when in the asyn-
chronous read mode. Refer to the “Autoselect Command Sequence” section on page 51 for more
information.
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