參數(shù)資料
型號(hào)： MBM29DL800BA-12
廠商： Fujitsu Limited
英文描述： LED Lamp; Bulb Size:T-1 3/4; LED Color:Red; Luminous Intensity:2000mcd; Viewing Angle:22 ; Forward Current:20mA; Forward Voltage:1.9V; Operating Temperature Range:-25 C to C; Leaded Process Compatible:Yes RoHS Compliant: Yes
中文描述： 800萬(wàn)（100萬(wàn)X 8/512K × 16）位
文件頁(yè)數(shù)： 26/59頁(yè)
文件大?。?/td> 600K
代理商： MBM29DL800BA-12
MBM29DL800TA
-70/-90/-12
/MBM29DL800BA
-70/-90/-12
26
For example, DQ
2
and DQ
6
can be used together to determine if the erase-suspend-read mode is in progress.
(DQ
2
toggles while DQ
6
does not.) See also Table 9 and Figure 19.
Furthermore, DQ
2
can also be used to determine which sector is being erased. When the device is in the erase
mode, DQ
2
toggles if this bit is read from an erasing sector.
To operate toggle bit function properly, CE or OE must be high when bank address is changed.
Note:
Successive reads from the erasing or erase-suspend sector will cause DQ
2
to toggle. Reading from non-
erase suspend sector address will indicate logic “1” at the DQ
2
bit.
RY/BY
Ready/Busy
The MBM29DL800TA/BA provide a RY/BY open-drain output pin as a way to indicate to the host system that
the Embedded Algorithms are either in progress or has been completed. If the output is low, the devices are
busy with either a program or erase operation. If the output is high, the devices are ready to accept any read/
write or erase operation. When the RY/BY pin is low, the devices will not accept any additional program or erase
commands. If the MBM29DL800TA/BA are placed in an Erase Suspend mode, the RY/BY output will be high.
During programming, the RY/BY pin is driven low after the rising edge of the fourth write pulse. During an erase
operation, the RY/BY pin is driven low after the rising edge of the sixth write pulse. The RY/BY pin will indicate
a busy condition during the RESET pulse. Refer to Figure 11 and 12 for a detailed timing diagram. The RY/BY
pin is pulled high in standby mode.
Since this is an open-drain output, RY/BY pins can be tied together in parallel with a pull-up resistor to V
CC
.
Byte/Word Configuration
The BYTE pin selects the byte (8-bit) mode or word (16-bit) mode for the MBM29DL800TA/BA devices. When
this pin is driven high, the devices operate in the word (16-bit) mode. The data is read and programmed at DQ
0
to DQ
15
. When this pin is driven low, the devices operate in byte (8-bit) mode. Under this mode, the DQ
15
/A
-1
pin
becomes the lowest address bit and DQ
8
to DQ
14
bits are tri-stated. However, the command bus cycle is always
an 8-bit operation and hence commands are written at DQ
0
to DQ
7
and the DQ
8
to DQ
15
bits are ignored. Refer
to Figures 13, 14 and 15 for the timing diagram.
Data Protection
The MBM29DL800TA/BA are designed to offer protection against accidental erasure or programming caused
by spurious system level signals that may exist during power transitions. During power up the devices
automatically reset the internal state machine in the Read mode. Also, with its control register architecture,
alteration of the memory contents only occurs after successful completion of specific multi-bus cycle command
sequences.
The devices also incorporate several features to prevent inadvertent write cycles resulting form V
CC
power-up
and power-down transitions or system noise.
Mode
DQ
7
DQ
6
DQ
2
Program
DQ
7
Toggle
1
Erase
0
Toggle
Toggle (Note)
Erase-Suspend Read
(Erase-Suspended Sector)
1
1
Toggle
Erase-Suspend Program
DQ
7
Toggle
1 (Note)
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