STM32G47PBY6XXX datasheet(183/229 Pages) STMICROELECTRONICS

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DS12712 Rev 3

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STM32G473xB STM32G473xC STM32G473xE

Electrical characteristics

194

Synchronous waveforms and timings

Figure 44 through Figure 47 represent synchronous waveforms and Table 97

through Table 100 provide the corresponding timings. The results shown in these

tables are obtained with the following FMC configuration:

•

BurstAccessMode = FMC_BurstAccessMode_Enable

•

MemoryType = FMC_MemoryType_CRAM

•

WriteBurst = FMC_WriteBurst_Enable

•

CLKDivision = 1

•

DataLatency = 1 for NOR Flash; DataLatency = 0 for PSRAM

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

•

For 2.7 V ≤ VDD ≤ 3.6 V, maximum FMC_CLK = 60 MHz for CLKDIV = 0x1 and 54 MHz

for CLKDIV = 0x0 at CL = 30 pF (on FMC_CLK).

•

For 1.71 V ≤ VDD ≤ 2.7 V, maximum FMC_CLK = 60 MHz for CLKDIV = 0x1 and

32 MHz for CLKDIV = 0x0 at CL= 20 pF (on FMC_CLK).

Figure 44. Synchronous multiplexed NOR/PSRAM read timings

FMC_CLK

FMC_NEx

FMC_NADV

FMC_A[25:16]

FMC_NOE

FMC_AD[15:0]

AD[15:0]

FMC_NWAIT

(WAITCFG = 1b,

WAITPOL + 0b)

FMC_NWAIT

(WAITCFG = 0b,

WAITPOL + 0b)

tw(CLK)

Data latency = 0

BUSTURN = 0

td(CLKL-NExL)

td(CLKH-NExH)

t d(CLKL-NADVL)

td(CLKL-AV)

td(CLKL-NADVH)

td(CLKH-AIV)

td(CLKL-NOEL)

td(CLKH-NOEH)

td(CLKL-ADV)

td(CLKL-ADIV)

tsu(ADV-CLKH)

th(CLKH-ADV)

tsu(ADV-CLKH)

th(CLKH-ADV)

tsu(NWAITV-CLKH)

th(CLKH-NWAITV)

tsu(NWAITV-CLKH)

th(CLKH-NWAITV)

tsu(NWAITV-CLKH)

th(CLKH-NWAITV)

MS32757V1

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