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TMS28F004AZB80CDCDL Datasheet(PDF) 17 Page - Texas Instruments

Part No. TMS28F004AZB80CDCDL
Description  524288 BY 8-BIT/262144 BY 16-BIT AUTO-SELECT BOOT-BLOCK FLASH MEMORIES
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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TMS28F004AZB80CDCDL Datasheet(HTML) 17 Page - Texas Instruments

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TMS28F004Axy, TMS28F400Axy
524288 BY 8-BIT/262144 BY 16-BIT
AUTO-SELECT BOOT-BLOCK FLASH MEMORIES
SMJS829A – JANUARY 1996 – REVISED AUGUST 1997
17
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
BUS
OPERATION
COMMAND
COMMENTS
Write
Write
program
setup
Data = 40h or 10h
Addr = Address of
byte to be
programmed
Write
Write data
Data = Byte to be
programmed
Addr = Address of
byte to be
programmed
Read
Status-register data.
Toggle G or E to update
status register.
Standby
Check SB7
1 = Ready, 0 = Busy
Repeat for subsequent bytes
Write FFh after the last byte-programming operation to
reset the device to read-array mode.
BUS
OPERATION
COMMAND
COMMENTS
Standby
Check SB3
1 = Detect VPP low
(see Note B)
Standby
Check SB4
1 = Byte-program error
(see Note C)
NOTES: A. Full status-register check can be done after each word or after a sequence of words.
B. SB3 must be cleared before attempting additional program / erase operations.
C. SB4 is cleared only by the clear-status-register command, but it does not prevent additional program operation attempts.
Figure 3. Automated Byte-Programming Flow Chart
Start
Issue Program-Setup
Command and Byte Address
Issue Byte
Address/Data
SB7 = 1
?
No
Full Status-Register
Check (optional)
See Note A
Yes
Byte-Program Completed
FULL STATUS-REGISTER-CHECK FLOW
Read
Status-Register Bits
SB3 = 0
?
No
Yes
VPP Range Error
SB4 = 0
?
No
Yes
Byte-Program
Failed
Byte-Program Passed
Read Status-Register
Bits


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