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TMS28F004AZB90CDCDL Datasheet(PDF) 18 Page - Texas Instruments |
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TMS28F004AZB90CDCDL Datasheet(HTML) 18 Page - Texas Instruments |
18 / 80 page TMS28F004Axy, TMS28F400Axy 524288 BY 8-BIT/262144 BY 16-BIT AUTO-SELECT BOOT-BLOCK FLASH MEMORIES SMJS829A – JANUARY 1996 – REVISED AUGUST 1997 18 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443 BUS OPERATION COMMAND COMMENTS Write Write program setup Data = 40h or 10h Addr = Address of word to be programmed Write Write data Data = Word to be programmed Addr = Address of word 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 words. Write FFh after the last word-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 = Word-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 4. Automated Word-Programming Flow Chart Start Issue Program-Setup Command and Word Address Issue Word Address/Data Read Status-Register Bits SB7 = 1 ? No Full Status-Register Check (optional) See Note A Yes Word-Program Completed FULL STATUS-REGISTER-CHECK FLOW SB3 = 0 ? No Yes VPP Range Error SB4 = 0 ? No Yes Word-Program Failed Word-Program Passed Read Status-Register Bits |
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