STM32F722IC datasheet(191/229 Pages) STMICROELECTRONICS

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DS11853 Rev 6

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STM32F722xx STM32F723xx

Electrical characteristics

201

NAND controller waveforms and timings

Figure 70 through Figure 73 represent synchronous waveforms, and Table 105 and

Table 106 provide the corresponding timings. The results shown in this table are obtained

with the following FMC configuration:

•

COM.FMC_SetupTime = 0x01;

•

COM.FMC_WaitSetupTime = 0x03;

•

COM.FMC_HoldSetupTime = 0x02;

•

COM.FMC_HiZSetupTime = 0x01;

•

ATT.FMC_SetupTime = 0x01;

•

ATT.FMC_WaitSetupTime = 0x03;

•

ATT.FMC_HoldSetupTime = 0x02;

•

ATT.FMC_HiZSetupTime = 0x01;

•

Bank = FMC_Bank_NAND;

•

MemoryDataWidth = FMC_MemoryDataWidth_16b;

•

ECC = FMC_ECC_Enable;

•

ECCPageSize = FMC_ECCPageSize_512Bytes;

•

TCLRSetupTime = 0;

•

TARSetupTime = 0.

In all timing tables, the THCLK is the HCLK clock period.

Table 104. Synchronous non-multiplexed PSRAM write timings(1)

1. Guaranteed by characterization results.

Symbol

Parameter

Min

Max

Unit

t(CLK)

FMC_CLK period

2Thclk - 0.5

td(CLKL-NExL) FMC_CLK low to FMC_NEx low (x=0..2)

t(CLKH-NExH)

FMC_CLK high to FMC_NEx high (x= 0…2)

Thclk +0.5

td(CLKL-NADVL) FMC_CLK low to FMC_NADV low

0.5

td(CLKL-NADVH) FMC_CLK low to FMC_NADV high

td(CLKL-AV)

FMC_CLK low to FMC_Ax valid (x=16…25)

td(CLKH-AIV)

FMC_CLK high to FMC_Ax invalid (x=16…25)

Thclk

td(CLKL-NWEL) FMC_CLK low to FMC_NWE low

1.5

td(CLKH-NWEH) FMC_CLK high to FMC_NWE high

Thclk +1

td(CLKL-Data)

FMC_D[15:0] valid data after FMC_CLK low

td(CLKL-NBLL) FMC_CLK low to FMC_NBL low

td(CLKH-NBLH) FMC_CLK high to FMC_NBL high

Thclk +1

tsu(NWAIT-CLKH) FMC_NWAIT valid before FMC_CLK high

th(CLKH-NWAIT) FMC_NWAIT valid after FMC_CLK high

3.5

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