MBM29DL32XTE/BE80/90
active current (ICC2) is required even CE = “H”. The device can be read with standard access time (tCE) from either
of these standby modes.
When using the RESET pin only, a CMOS standby mode is achieved with RESET input held at VSS ± 0.3 V (CE
= “H” or “L”) . Under this condition the current is consumed is less than 5 µA Max Once the RESET pin is taken
high, the device requires tRH of wake up time before outputs are valid for read access.
In the standby mode the outputs are in the high impedance state, independent of the OE input.
• Automatic Sleep Mode
There is a function called automatic sleep mode to restrain power consumption during read-out of
MBM29DL32XTE/BE data. This mode can be used effectively with an application requested low power con-
sumption such as handy terminals.
To activate this mode, MBM29DL32XTE/BE automatically switch themselves to low power mode when
MBM29DL32XTE/BE addresses remain stably during access fine of 150 ns. It is not necessary to control CE,
WE, and OE on the mode. Under the mode, the current consumed is typically 1 µA (CMOS Level) .
During simultaneous operation, VCC active current (ICC2) is required.
Since the data are latched during this mode, the data are read-out continuously. If the addresses are changed,
the mode is canceled automatically and MBM29DL32XTE/BE read-out the data for changed addresses.
• Output Disable
With the OE input at a logic high level (VIH) , output from the devices are disabled. This will cause the output
pins to be in a high impedance state.
• Autoselect
The autoselect mode allows the reading out of a binary code from the devices and will identify its manufacturer
and type. This mode is intended for use by programming equipment for the purpose of automatically matching
the devices to be programmed with its corresponding programming algorithm. This mode is functional over the
entire temperature range of the devices.
To activate this mode, the programming equipment must force VID (11.5 V to 12.5 V) on address pin A9. Two
identifier bytes may then be sequenced from the devices outputs by toggling address A0 from VIL to VIH. All
addresses are DON’T CARES except A0, A1, and A6 (A-1) . (See “MBM29DL32XTE/BE User Bus Operations
(BYTE = VIH) ” and “MBM29DL32XTE/BE User Bus Operations (BYTE = VIL) ” in “■DEVICE BUS OPERATION”.)
The manufacturer and device codes may also be read via the command register, for instances when the
MBM29DL32XTE/BE are erased or programmed in a system without access to high voltage on the A9 pin. The
command sequence is illustrated in “MBM29DL32XTE/BE Command Definitions” in “■ DEVICEBUS OPERA-
TION”. (Refer to Autoselect Command section.)
Byte 0 (A0 = VIL) represents the manufacturer’s code (Fujitsu = 04h) and word 1 (A0 = VIH) represents the device
identifier code (MBM29DL322TE = 55h and MBM29DL322BE = 56h for ×8 mode; MBM29DL322TE = 2255h
and MBM29DL322BE = 2256h for ×16 mode) . (MBM29DL323TE = 50h and MBM29DL323BE = 53h for ×8
mode; MBM29DL323TE = 2250h and MBM29DL323BE = 2253h for ×16
mode) . (MBM29DL324TE = 5Ch and MBM29DL324BE = 5Fh for ×8 mode; MBM29DL324TE = 225Ch and
MBM29DL324BE = 225Fh for ×16 mode) . These two bytes/words are given in “MBM29DL322/323/324TE/BE
Sector Group Protection Verify Autoselect Codes Tables”, “Extended Autoselect Code Tables” in “■ DEVICE
BUS OPERATION”. All identifiers for manufactures and device will exhibit odd parity with DQ7 defined as the
parity bit. In order to read the proper device codes when executing the autoselect, A1 must be VIL. (See
“MBM29DL322/323/324TE/BE Sector Group Protection Verify Autoselect Codes Tables”, “Extended Autoselect
Code Tables” in “■ DEVICE BUS OPERATION”.)
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SPANSION [ SPANSION ]
