MBM29LV160T Fujitsu Media Devices, MBM29LV160T Datasheet - Page 12

• Manufacturer Part Number: MBM29LV160T
• Description: 16M (2M x 8/1M x 16) BIT
• Manufacturer: Fujitsu Media Devices

12
MBM29LV160T
Read Mode
Standby Mode
Automatic Sleep Mode
Output Disable
Autoselect
The MBM29LV160T/B has 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
There are two ways to implement the standby mode on the MBM29LV160T/B devices. One is by 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 max. During Embedded Algorithm operation, V
Active current (I
either of these standby modes.
When using the RESET pin only, a CMOS standby mode is achieved with the RESET input held at V
(CE = “H” or “L”). Under this condition the current consumed is less than 5 A max. Once the RESET pin is
taken 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
MBM29LV160T/B data. This mode can be used effectively with an application requesting low power consumption
such as handy terminals.
To activate this mode, MBM29LV160T/B automatically switches itself to low power mode when addresses remain
stable for 150 ns. It is not necessary to control CE, WE, and OE in this mode. During such mode, the current
consumed is typically 1 A (CMOS Level).
Standard address access timings provide new data when addresses are changed. While in sleep mode, output
data is latched and always available to the system.
If the OE input is at a logic high level (V
be in a high-impedance state.
The Autoselect mode allows the reading out of a binary code from the device and will identify its manufacturer
and type. The intent is to allow programming equipment to automatically match the device to be programmed
with its corresponding programming algorithm. The Autoselect command may also be used to check the status
of write-protected sectors. (See Tables 4.1 and 4.2.) This mode is functional over the entire temperature range
of the device.
To activate this mode, the programming equipment must force V
identifier bytes may then be sequenced from the devices outputs by toggling address A
addresses are DON’T CARES except A
FUNCTIONAL DESCRIPTION
CE
) is the delay from stable addresses and stable CE to valid data at the output pins. The output
CC2
) is required even CE = “H”. The device can be read with standard access time (t
ACC
) is equal to the delay from stable addresses to valid output data. The chip enable
-80/-90/-12
RH
of wake up time before outputs are valid for read access.
IH
0
), output from the device is disabled. This will cause the output pins to
ACC
, A
1
- t
, and A
OE
/MBM29LV160B
time.) See Figure 5.1 for timing specifications.
6
(A
-1
). (See Table 2 or Table 3.)
ID
(11.5 V to 12.5 V) on address pin A
-80/-90/-12
0
from V
IL
to V
CE
CC
SS
IH
) from
9
. Two
. All
±0.3 V.
±0.3 V
CC