M36W432T Datasheet, PDF(8/57 Page) STMicroelectronics – 32 Mbit 2Mb x16, Boot Block Flash Memory and 4 Mbit 256K x16 SRAM, Multiple Memory Product

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M36W432T Datasheet, PDF (8/57 Pages) STMicroelectronics – 32 Mbit 2Mb x16, Boot Block Flash Memory and 4 Mbit 256K x16 SRAM, Multiple Memory Product

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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

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).

Figure 4. Functional Block Diagram

VVDDDDFF

VVDDDDQQFF

VVPPPPFF

RPF

WPF

A18-A20

A0-A17

Flash Memory

F3la2sMh bMite(mx1o6r)y

32 Mbit (x16)

VVDDDDSS

VVSSSSFF

DQ0-DQ15

E1S

E2S

UBS

LBS

SRAM

4 MSbRitA(Mx16)

4 Mbit (x16)

VVSSSSSS

AI05202

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