AN4570 datasheet(13/46 Pages) STMICROELECTRONICS

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DocID026804 Rev 1

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AN4570

Interfacing with a non-multiplexed, asynchronous 16-bit NOR Flash memory

2.3

Hardware connection

Table 5 gives the correspondence between the NOR Flash memory pins and the FMC pins

and shows the GPIO configuration for each FMC pin.

In case of an 8-bit NOR Flash memory, the data/address bus is 8-bit wide and D8-D15

should not be connected to the FMC. The unused FMC pins can be used for general

purpose I/O.

In case of a synchronous memory, the FSMC_CLK pin should be connected to the memory

clock pin.

Figure 5 shows a typical connection between an STM32F30xxD/E microcontroller and the

M29W128FL NOR Flash memory.

Table 5. M29W128FL signal to FMC pin correspondence

Memory

signals

FMC

signals

Pin / Port assignment

Pin / Port

configuration

Signal description

A0-A22

Port F/Port G/Port E/Port

D/PortH

AF push-pull

Address A0-A22

DQ0-DQ7

D0-D7

Port D/Port E

AF push-pull

Data D0-D7

DQ8-DQ14

D8-D14

Port D/Port E

AF push-pull

Data D8-D14

DQ15A-1

D15

PD10

AF push-pull

Data D15

NE2

PG9

AF push-pull

Chip Enable

NOE

PD4

AF push-pull

Output Enable

NWE

PD5

AF push-pull

Write Enable

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