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TMS28F200BZB80BDBJE Datasheet(PDF) 4 Page - Texas Instruments

Part # TMS28F200BZB80BDBJE
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

TMS28F200BZB80BDBJE Datasheet(HTML) 4 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
4
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
block memory maps (continued)
3FFFFh
3C000h
3BFFFh
3A000h
39FFFh
38000h
37FFFh
20000h
1FFFFh
00000h
Address
Range
Boot Block
16K Addresses
Parameter Block
8K Addresses
Parameter Block
8K Addresses
Main Block
96K Addresses
Main Block
128K Addresses
×8 Configuration
DQ15/A –1 Is LSB Address
1FFFFh
1E000h
1DFFFh
1D000h
1CFFFh
1C000h
1BFFFh
10000h
0FFFFh
00000h
Address
Range
Boot Block
8K Addresses
Parameter Block
4K Addresses
Parameter Block
4K Addresses
Main Block
48K Addresses
Main Block
64K Addresses
×16 Configuration
A0 Is LSB Address
Figure 1. TMS28F200BZT ( Top Boot Block ) Memory Map
3FFFFh
20000h
1FFFFh
08000h
07FFFh
06000h
05FFFh
04000h
03FFFh
00000h
Address
Range
Main Block
128K Addresses
Main Block
96K Addresses
Parameter Block
8K Addresses
Parameter Block
8K Addresses
Boot Block
16K Addresses
×8 Configuration
DQ15/A –1 Is LSB Address
1FFFFh
10000h
0FFFFh
04000h
03FFFh
03000h
02FFFh
02000h
01FFFh
00000h
Address
Range
Main Block
64K Addresses
Main Block
48K Addresses
Parameter Block
4K Addresses
Parameter Block
4K Addresses
Boot Block
8K Addresses
×16 Configuration
A0 Is LSB Address
Figure 2. TMS28F200BZB (Bottom Boot Block ) Memory Map
boot-block data protection
The 16K-byte boot block can be used to store key system data that is seldom changed in normal operation. To
protect data within this memory sector, the RP pin can be used to provide a lockout to eliminate either accidental
erase or program operations. When RP is operated with normal TTL / CMOS logic levels, the contents of the
boot block cannot be erased or reprogrammed. Changes to the contents of the boot block can be made only
when RP is at VHH (nominally 12 V) during normal write/erase operations.
parameter block
Two parameter blocks of 8K bytes each can be used like a scratch pad to store frequently updated data.
Alternatively, the parameter blocks can be used for additional boot- or main-block data. If a parameter block is
used to store additional boot-block data, caution should be exercised because the parameter block does not
have the boot-block data-protection safety feature.


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