MBM29LV008TA-70/-90/-12/MBM29LV008BA-70/-90/-12
Extended Command
(1) Fast Mode
MBM29LV008TA/BAhasFastModefunction. Thismodedispenseswiththeinitialtwounclockcyclesrequired
in the standard program command sequence by writing Fast Mode command into the command register. In
this mode, the required bus cycle for programming is two cycles instead of four bus cycles in standard
program command. (Do not write erase command in this mode.) The read operation is also executed after
exiting this mode. To exit this mode, it is necessary to write Fast Mode Reset command into the command
register. (Refer to the Figure 24 Extended algorithm.) The VCC active current is required even CE = VIH during
Fast Mode.
(2) Fast Programming
During Fast Mode, the programming can be executed with two bus cycles operation. The Embedded Program
Algorithm is executed by writing program set-up command (A0H) and data write cycles (PA/PD). (Refer to
the Figure 24 Extended algorithm.)
(3) Extended Sector Protection
In addition to normal sector protection, the MBM29LV008TA/BA has Extended Sector Protection as extended
function. This function enable to protect sector by forcing VID on RESET pin and write a commnad sequence.
Unlike conventional procedure, it is not necessary to force VID and control timing for control pins. The only
RESET pinrequiresVID forsectorprotectioninthismode. TheextendedsectorprotectrequiresVID onRESET
pin. With this condition, the operation is initiated by writing the set-up command (60H) into the command
register. Then, the sector addresses pins (A19, A18, A17, A16, A15, A14, and A13) and (A10, A6, A1, A0) = (0, 0, 1,
0) should be set to the sector to be protected (recommend to set VIL for the other addresses pins), and write
extended sector protect command (60H). A sector is typically protected in 150 µs. To verify programming of
the protection circuitry, the sector addresses pins (A19, A18, A17, A16, A15, A14, and A13) and (A10, A6, A1, A0) =
(0, 0, 1, 0) should be set and write a command (40H). Following the command write, a logical “1” at device
output DQ0 will produce for protected sector in the read operation. If the output data is logical “0”, please
repeat to write extended sector protect command (60H) again. To terminate the operation, it is necessary
to set RESET pin to VIH.
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