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M29F200BT Datasheet(PDF) 3 Page - STMicroelectronics

Part No. M29F200BT
Description  2 Mbit 256Kb x8 or 128Kb x16, Boot Block Single Supply Flash Memory
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M29F200BT Datasheet(HTML) 3 Page - STMicroelectronics

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M29F200BT, M29F200BB
The blocks in the memory are asymmetrically ar-
ranged, see Tables 3A and 3B, Block Addresses.
The first or last 64 Kbytes have been divided into
four additional blocks. The 16 Kbyte Boot Block
can be used for small initialization code to start the
microprocessor, the two 8 Kbyte Parameter
Blocks can be used for parameter storage and the
remaining 32K is a small Main Block where the ap-
plication may be stored.
Chip Enable, Output Enable and Write Enable sig-
nals control the bus operation of the memory.
They allow simple connection to most micropro-
cessors, often without additional logic.
The memory is offered in TSOP48 (12 x 20mm)
and SO44 packages. Access times of 45ns, 55ns,
70ns and 90ns are available. The memory is sup-
plied with all the bits erased (set to ’1’).
SIGNAL DESCRIPTIONS
See Figure 1, Logic Diagram, and Table 1, Signal
Names, for a brief overview of the signals connect-
ed to this device.
Address Inputs (A0-A16). The Address Inputs
select the cells in the memory array to access dur-
ing Bus Read operations. During Bus Write opera-
tions they control the commands sent to the
Command Interface of the internal state machine.
Data Inputs/Outputs (DQ0-DQ7). The Data In-
puts/Outputs output the data stored at the selected
address during a Bus Read operation. During Bus
Write operations they represent the commands
sent to the Command Interface of the internal state
machine.
Data Inputs/Outputs (DQ8-DQ14). The Data In-
puts/Outputs output the data stored at the selected
address during a Bus Read operation when BYTE
is High, VIH. When BYTE is Low, VIL, these pins
are not used and are high impedance. During Bus
Write operations the Command Register does not
use these bits. When reading the Status Register
these bits should be ignored.
Data Input/Output or Address Input (DQ15A-1).
When BYTE is High, VIH, this pin behaves as a
Data Input/Output pin (as DQ8-DQ14). When
BYTE is Low, VIL, this pin behaves as an address
pin; DQ15A–1 Low will select the LSB of the Word
on the other addresses, DQ15A–1 High will select
the MSB. Throughout the text consider references
to the Data Input/Output to include this pin when
BYTE is High and references to the Address In-
puts to include this pin when BYTE is Low except
when stated explicitly otherwise.
Chip Enable (E). The Chip Enable, E, activates
the memory, allowing Bus Read and Bus Write op-
erations to be performed. When Chip Enable is
High, VIH, all other pins are ignored.
Output Enable (G). The Output Enable, G, con-
trols the Bus Read operation of the memory.
Write Enable (W). The Write Enable, W, controls
the Bus Write operation of the memory’s Com-
mand Interface.
Table 2. Absolute Maximum Ratings (1)
Note: 1. Except for the rating ”Operating Temperature Range”, stresses above those listed in the Table ”Absolute Maximum Ratings” may
cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions
above those indicated in the Operating sections of this specification is not implied. Exposure to Absolute Maximum Rating condi-
tions for extended periods may affect device reliability. Refer also to the STMicroelectronics SURE Program and other relevant qual-
ity documents.
2. Minimum Voltage may undershoot to –2V during transition and for less than 20ns during transitions.
Symbol
Parameter
Value
Unit
TA
Ambient Operating Temperature (Temperature Range Option 1)
0 to 70
°C
Ambient Operating Temperature (Temperature Range Option 6)
–40 to 85
°C
Ambient Operating Temperature (Temperature Range Option 3)
–40 to 125
°C
TBIAS
Temperature Under Bias
–50 to 125
°C
TSTG
Storage Temperature
–65 to 150
°C
VIO
(2)
Input or Output Voltage
–0.6 to 6
V
VCC
Supply Voltage
–0.6 to 6
V
VID
Identification Voltage
–0.6 to 13.5
V


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