STM32H7 datasheet(162/357 Pages) STMICROELECTRONICS

162 / 357 page

Electrical characteristics (rev Y)

STM32H742xI/G STM32H743xI/G

162/357

DS12110 Rev 10

Figure 35. NAND controller waveforms for common memory write access

MS32770V1

tw(NWE)

th(NWE-D)

tv(NWE-D)

FMC_NWE

FMC_N OE

FMC_D[15:0]

td(D-NWE)

ALE (FMC_A17)

CLE (FMC_A16)

FMC_NCEx

td(ALE-NOE)

th(NOE-ALE)

Table 78. Switching characteristics for NAND flash read cycles(1)

Symbol

Parameter

Min

Max

Unit

tw(N0E)

FMC_NOE low width

4Tfmc_ker_ck –0.5 4Tfmc_ker_ck + 0.5

tsu(D-NOE)

FMC_D[15-0] valid data before FMC_NOE high

th(NOE-D)

FMC_D[15-0] valid data after FMC_NOE high

td(ALE-NOE) FMC_ALE valid before FMC_NOE low

3Tfmc_ker_ck + 1

th(NOE-ALE) FMC_NWE high to FMC_ALE invalid

4Tfmc_ker_ck − 2-

1. Guaranteed by characterization results.

Table 79. Switching characteristics for NAND flash write cycles(1)

Symbol

Parameter

Min

Max

Unit

tw(NWE)

FMC_NWE low width

4Tfmc_ker_ck − 0.5

4Tfmc_ker_ck + 0.5

tv(NWE-D)

FMC_NWE low to FMC_D[15-0] valid

th(NWE-D)

FMC_NWE high to FMC_D[15-0] invalid

2Tfmc_ker_ck − 0.5

td(D-NWE)

FMC_D[15-0] valid before FMC_NWE high

5Tfmc_ker_ck − 1-

td(ALE-NWE)

FMC_ALE valid before FMC_NWE low

3Tfmc_ker_ck + 0.5

th(NWE-ALE)

FMC_NWE high to FMC_ALE invalid

2Tfmc_ker_ck − 1-

1. Guaranteed by characterization results.

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