M72DW64000B90ZT STMICROELECTRONICS [STMicroelectronics], M72DW64000B90ZT Datasheet - Page 8

• Manufacturer Part Number: M72DW64000B90ZT
• Description: 64Mbit (x8/ x16, Multiple Bank, Boot Block) Flash Memory and 16Mbit Pseudo SRAM, 3V Supply, Multiple Memory Product
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

M72DW64000B
FUNCTIONAL DESCRIPTION
The Flash Memory and PSRAM components have
a common power supply. The components are dis-
tinguished by four chip enable inputs: E
Flash memory, and E1
Recommended operating conditions do not allow
more than one component (Flash Memory or
PSRAM) to be in active mode at the same time.
Table 2. Main Operation Modes
Note: 1. X = Don’t Care (V
8/19
Operation Mode
2. UB
3. This table is valid when BYTE = V
4. For the Block Protect and Unprotect features, refer to the M29DW640D datasheet. Only the In-System Technique is available in
5. To read the Manufacturer Code, the Device Code, the Block Protection Status and the Extended Block indicator bit, refer to the
Read
Write
Output Disable
Standby
Reset
Read
Write
Output Disable
Standby
Deep Power Down
high impedance when the Flash Memory components are being accessed.
the stacked product.
“Auto Select Command” in the M29DW640D datasheet.
P
and LB
P
are tied together.
(3)
IL
or V
P
and E2
Flash Memory
Memory mode
E
IH
V
V
V
is allowable
X
X
F1
must be in
IH
Any Flash
).
IL
IL
Standby
P
RP
±0.3
IH
V
V
V
V
V
for the PSRAM.
. This table is also valid when BYTE = V
CC
IH
IH
IH
IL
F
F
V
V
V
V
V
V
G
X
X
X
X
IH
IH
IH
IH
IL
IL
for the
V
V
V
V
V
V
W
X
X
X
X
IH
IH
IH
IH
IL
IL
The most common example is simultaneous read
operations on the Flash Memory and PSRAM
components which would result in a data bus con-
tention. Therefore it is recommended, when read-
ing from one memory component, to put the other
in the high impedance state (see Table 2 Main Op-
eration Modes for details).
Any PSRAM mode is allowed
PSRAM must be in Standby
E1
V
V
V
V
X
IH
IL
IL
IL
P
E2
V
V
V
V
V
IL
IH
IH
IH
IH
IL
, with the only difference that DQ15-DQ8 are always
P
UB
P
, LB
V
V
X
X
X
IL
IL
P
(2)
PSRAM Data Output
Flash Memory Data
Flash Memory Data
Flash Memory Hi-Z
PSRAM Data Input
PSRAM Hi-Z
DQ15-DQ0
Output
Input