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TMS28F200BZB Datasheet(PDF) 3 Page - Texas Instruments

Part # TMS28F200BZB
Description  262144 BY 8-BIT/131072 BY 16-BIT BOOT-BLOCK FLASH MEMORIES
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TMS28F200BZB Datasheet(HTML) 3 Page - Texas Instruments

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TMS28F200BZT, TMS28F200BZB
262144 BY 8-BIT/131072 BY 16-BIT
BOOT-BLOCK FLASH MEMORIES
SMJS200E – JUNE 1994 – REVISED JANUARY 1998
3
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
functional block diagram
Counter
Address
Address
Latch
Control
Reduction
Power-
X Decoder
Y Decoder
Y Gating / Sensing
Block
Main
128K-Byte
Block
Main
96K-Byte
Block
Parameter
8K-Byte
Block
Parameter
8K-Byte
Block
Boot
16K-Byte
I/O Logic
Program/
Voltage
Switch
Erase
Machine
State
Write
Machine
State
Command
Data
Comparator
Register
Data
Input
Buffer
Input
Buffer
Register
Status
Register
Identification
Multiplexer
Output
Input Buffer
DQ15/A –1
Output
Buffer
Buffer
Output
DQ8 – DQ15/A –1
DQ0 – DQ7
A0 –
A16
BYTE
E
W
G
RP
VPP
Input
Buffer
17
8
8
8
architecture
The TMS28F200BZx uses a blocked architecture to allow independent erasure of selected memory blocks.The
block to be erased is selected by using any valid address within that block.
block memory maps
The TMS28F200BZx is available with the block architecture mapped in either of two configurations: the boot
block located at the top or at the bottom of the memory array, as required by different microprocessors. The
TMS28F200BZB (bottom boot block ) is mapped with the 16K-byte boot block located at the low-order address
range (00000h to 01FFFh). The TMS28F200BZT (top boot block ) is inverted with respect to the
TMS28F200BZB with the boot block located at the high-order address range (1E000h to 1FFFFh). Both of these
address ranges are for word-wide mode. Figure 1 and Figure 2 show the memory maps for these
configurations.


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