AN2784

STM32F10xxx FSMC configuration in 100-pin packages

Doc ID 14779 Rev 4

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5.2

Interfacing the FSMC with a NOR Flash memory

In devices that come in 100-pin packages, only Bank 1 (NOR/PSRAM 1) can be used to

interface with a NOR Flash memory. This is because the NE2, NE3 and NE4 pins are not

available in these packages.

Likewise, the A0-A15 pins are not available, so the NOR Flash controller should be used in

multiplexed mode to use the databus for both address and data.

In 8-bit muxed mode, the FSMC address signals A[15:8] are avaialble on the AD[15:8] pins.

Table 10 shows how to connect a NOR Flash memory to the FSMC peripheral of devices

delivered in 100-pin packages.

Table 10.

NOR Flash memory connection to the FSMC

8-/16-bit NOR/PSRAM pins

FSMC pins

100-pin package

A[15:0]

A[15:0]

DA[15:0]

A[23:16]

A[23:16]

A[23:16]

DQ[15:0]

D[15:0]

D[15:0]

W

NWE

NWE

E

NE1/NE2/NE3/NE4

NE1

G

NOE

NOE

ADV

NADV

NADV

R/B

NWAIT

NWAIT

UB, LB

NBL[1:0]

NBL[1:0]