m36w432b STMicroelectronics, m36w432b Datasheet - Page 8

• Manufacturer Part Number: m36w432b
• Description: 32 Mbit 2mb X16, Boot Block Flash Memory And 4 Mbit 256k X16 Sram, Multiple Memory Product
• Manufacturer: STMicroelectronics

M36W432T, M36W432B
FUNCTIONAL DESCRIPTION
The Flash and SRAM components have separate
power supplies and grounds and are distinguished
by three chip enable inputs: EF for the Flash mem-
ory and, E1S and E2S for the SRAM.
Recommended operating conditions do not allow
both the Flash and the SRAM to be in active mode
at the same time. The most common example is
Figure 4. Functional Block Diagram
8/57
A18-A20
A18-A20
A0-A17
A0-A17
WPF
WPF
UBS
UBS
RPF
RPF
E1S
E2S
LBS
E1S
E2S
LBS
WF
WS
WS
WF
GS
GF
GS
GF
EF
EF
V DDS
V DDF
V DDS
V DDF
Flash Memory
Flash Memory
32 Mbit (x16)
32 Mbit (x16)
4 Mbit (x16)
4 Mbit (x16)
SRAM
V DDQF
SRAM
V DDQF
V SSS
V SSS
simultaneous read operations on the Flash and
the SRAM which would result in a data bus con-
tention. Therefore it is recommended to put the
SRAM in the high impedance state when reading
the Flash and vice versa (see Table 2 Main Oper-
ation Modes for details).
V PPF
V SSF
V PPF
V SSF
DQ0-DQ15
DQ0-DQ15
AI05202
AI05202