MBM29SL800BD Fujitsu Media Devices, MBM29SL800BD Datasheet - Page 14

• Manufacturer Part Number: MBM29SL800BD
• Description: (MBM29SL800TD/BD) FLASH MEMORY CMOS 8 M (1 M X 8/512 K X 16) BIT
• Manufacturer: Fujitsu Media Devices

14
MBM29SL800TD
Read Mode
Standby Mode
Automatic Sleep Mode
Output Disable
Autoselect
FUNCTIONAL DESCRIPTION
The MBM29SL800TD/BD have two control functions which must be satisfied in order to obtain data at the outputs.
CE is the power control and should be used for a device selection. OE is the output control and should be used
to gate data to the output pins if a device is selected.
Address access time (t
access time (t
enable access time is the delay from the falling edge of OE to valid data at the output pins. (Assuming the
addresses have been stable for at least t
power-up, it is necessary to input hardware reset or change CE pin from “H” to “L”
There are two ways to implement the standby mode on the MBM29SL800TD/BD devices, one using both the
CE and RESET pins; the other via the RESET pin only.
When using both pins, a CMOS standby mode is achieved with CE and RESET inputs both held at V
Under this condition the current consumed is less than 5 A. The device can be read with standard access time
(t
required even CE
When using the RESET pin only, a CMOS standby mode is achieved with RESET input held at V
high, the device requires t
In the standby mode the outputs are in the high impedance state, independent of the OE input.
There is a function called automatic sleep mode to restrain power consumption during read-out of
MBM29SL800TD/800BD data. This mode can be used effectively with an application requested low power
consumption such as handy terminals.
To activate this mode, MBM29SL800TD/800BD automatically switch themselves to low power mode when
MBM29SL800TD/800BD 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 A (CMOS Level) .
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 MBM29SL800TD/800BD read-out the data for changed addresses.
With the OE input at a logic high level (V
pins to be in a high impedance state.
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 V
bytes may then be sequenced from the devices outputs by toggling address A
DON’T CARES except A
Codes Table” in DEVICE BUS OPERATION.)
The manufacturer and device codes may also be read via the command register, for instances when the
MBM29SL800TD/BD are erased or programmed in a system without access to high voltage on the A
command sequence is illustrated in “MBM29SL800TD/800BD Standard Command Definitions Table” (in DE-
VICE BUS OPERATION). (Refer to Autoselect Command section.)
Byte 0 (A
code (MBM29SL800TD
MBM29SL800BD 226Bh for 16 mode) . These two bytes/words are given in “MBM29SL800TD/800BD Sector
Protection Verify Autoselect Codes Table and Extended Autoselect Code Table (in DEVICE BUS OPERATION”).
(CE “H” or “L”) . Under this condition the current is consumed is less than 5 A. Once the RESET pin is taken
CE
) from either of these standby modes. During Embedded Algorithm operation, V
0
V
IL
CE
) represents the manufacturer’s code (Fujitsu 04h) and (A
) is the delay from stable addresses and stable CE to valid data at the output pins. The output
“H”.
ACC
0
, A
RH
) is equal to the delay from stable addresses to valid output data. The chip enable
EAh and MBM29SL800BD
of wake up time before outputs are valid for read access.
1
, A
6
, and A-
-10/12
ACC
1
IH
. (See “MBM29SL800TD/800BD Sector Protection Verify Autoselect
/MBM29SL800BD
-t
) , output from the devices are disabled. This will cause the output
OE
time.) When reading out a data without changing addresses after
6Bh for 8 mode; MBM29SL800TD
ID
(10 V to 11 V) on address pin A
0
V
0
IH
from V
) represents the device identifier
-10/12
IL
CC
to V
active current (I
IH
. All addresses are
9
. Two identifier
SS
22EAh and
CC
9
0.3 V
pin. The
CC2
0.3 V.
) is