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STM32F101xx, STM32F102xx, STM32F103xx, STM32F105xx and ...

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RM0008<br />

Flexible static memory controller (FSMC)<br />

Mode C - NOR Flash - OE toggling<br />

Figure 168. ModeC read accesses<br />

Memory transaction<br />

A[25:0]<br />

NADV<br />

NEx<br />

NOE<br />

NWE<br />

High<br />

D[15:0]<br />

data driven<br />

by memory<br />

(ADDSET +1) (DATAST + 1)<br />

HCLK cycles HCLK cycles<br />

Data sampled<br />

2 HCLK<br />

cycles<br />

Data strobe<br />

ai14725c<br />

Figure 169. ModeC write accesses<br />

Memory transaction<br />

A[25:0]<br />

NADV<br />

NEx<br />

NOE<br />

NWE<br />

1HCLK<br />

D[15:0]<br />

data driven by FSMC<br />

(ADDSET +1) (DATAST + 1)<br />

HCLK cycles HCLK cycles<br />

ai14723b<br />

The differences compared with mode1 are the toggling of NOE <strong>and</strong> NADV <strong>and</strong> the<br />

independent read <strong>and</strong> write timings.<br />

Doc ID 13902 Rev 9 425/995

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