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TMS29F800T-100CDBJE Datasheet(PDF) 11 Page - Texas Instruments

Part # TMS29F800T-100CDBJE
Description  1048576 BY 8-BIT/ 524288 BY 16-BIT FLASH MEMORIES
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TMS29F800T-100CDBJE Datasheet(HTML) 11 Page - Texas Instruments

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TMS29F800T, TMS29F800B
1048576 BY 8-BIT/ 524288 BY 16-BIT
FLASH MEMORIES
SMJS835B – MAY 1997 – REVISED OCTOBER 1997
11
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
read mode
A logic-low signal applied to the CE and OE pins allows the output of the TMS29F800T/B to be read. When two
or more ’29F800T/B devices are connected in parallel, the output of any one device can be read without
interference. The CE pin is for power control and must be used for device selection. The OE pin is for output
control and is used to gate the data output onto the bus from the selected device.
The address-access time (tAVQV) is the delay from stable address to valid output data. The chip-enable (CE)
access time (tELQV) is the delay from CE low and stable addresses to valid output data. The output-enable
access time (tGLQV) is the delay from OE low to valid output data when CE equals logic low and addresses are
stable for at least the duration of tAVQV–tGLQV.
standby mode
ICC supply current is reduced by applying a logic-high level on CE and RESET to enter the standby mode. In
the standby mode, the outputs are placed in the high-impedance state. Applying a CMOS logic-high level on
CE and RESET reduces the current to 100
µA. Applying a TTL logic-high level on CE and RESET reduces the
current to 1 mA. If the ’29F800T/B is deselected during erasure or programming, the device continues to draw
active current until the operation is complete.
output disable
When OE equals VIH or CE equals VIH, output from the device is disabled and the output pins (DQ0–DQ15) are
placed in the high-impedance state.
automatic-sleep mode
The ’29F800 has a built-in feature called automatic-sleep mode to minimize device energy consumption which
is independent of CE, WE, and OE, and is enabled when addresses remain stable for 300 ns. Typical
sleep-mode current is 100
µA. Sleep mode does not affect output data, which remains latched and available
to the system.
algorithm selection
The algorithm-selection mode provides access to a binary code that matches the device with its proper
programming and erase command operations. This mode is activated when VID (11.5 V to 12.5 V) is placed on
address pin A9. Address pins A1 and A6 must be logic low. Two bytes of code are accessed by toggling address
pin A0 from VIL to VIH. Address pins other than A0, A1, and A6 can be at logic low or at logic high.
The algorithm-selection mode can also be read by using the command register, which is useful when VID is not
available to be placed on address pin A9. Table 5 shows the binary algorithm-selection codes.
Table 5. Algorithm-Selection Codes (5-V Single Power Supply)
CODE
DQ15
DQ14
DQ13
DQ12
DQ11
DQ10
DQ9
DQ8
DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
DQ0
Manufacturer-
equivalent code
01H
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
TMS29F800T–Byte
D6H
A–1
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
1
1
0
1
0
1
1
0
TMS29F800B–Byte
58H
A–1
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
0
1
0
1
1
0
0
0
TMS29F800T
22D6H
0
0
1
0
0
0
1
0
1
1
0
1
0
1
1
0
TMS29F800B
2258H
0
0
1
0
0
0
1
0
0
1
0
1
1
0
0
0
Sector protection
01H
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
† A1 = VIL, A6 = VIL, CE = VIL, OE = VIL


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