STM32L471RG datasheet(176/218 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32L471xx

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DocID027226 Rev 1

Quad SPI characteristics

Unless otherwise specified, the parameters given in Table 83 and Table 84 for Quad SPI

are derived from tests performed under the ambient temperature, fAHB frequency and VDD

supply voltage conditions summarized in Table 22: General operating conditions, with the

following configuration:

•

Output speed is set to OSPEEDRy[1:0] = 11

•

Capacitive load C = 15 or 20 pF

•

Measurement points are done at CMOS levels: 0.5 ₓ VDD

Refer to Section 6.3.14: I/O port characteristics for more details on the input/output alternate

function characteristics.

Table 83. Quad SPI characteristics in SDR mode(1)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

FCK

1/t(CK)

Quad SPI clock frequency

1.71 < VDD< 3.6 V, CLOAD = 20 pF

Voltage Range 1

MHz

1.71 < VDD< 3.6 V, CLOAD = 15 pF

Voltage Range 1

2.7 < VDD< 3.6 V, CLOAD = 15 pF

Voltage Range 1

1.71 < VDD < 3.6 V CLOAD = 20 pF

Voltage Range 2

tw(CKH)

Quad SPI clock high and

low time

fAHBCLK= 48 MHz, presc=0

t(CK)/2-2

t(CK)/2

tw(CKL)

t(CK)/2

t(CK)/2+2

ts(IN)

Data input setup time

Voltage Range 1

Voltage Range 2

3.5

th(IN)

Data input hold time

Voltage Range 1

5.5

Voltage Range 2

6.5

tv(OUT)

Data output valid time

Voltage Range 1

2.5

Voltage Range 2

th(OUT)

Data output hold time

Voltage Range 1

1.5

Voltage Range 2

1. Guaranteed by characterization results.

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