32G474 datasheet(199/236 Pages) STMICROELECTRONICS

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DS12288 Rev 4

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STM32G474xB STM32G474xC STM32G474xE

Electrical characteristics

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5.3.29

QUADSPI characteristics

Unless otherwise specified, the parameters given in Table 108 and Table 109 for Quad SPI

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

supply voltage conditions summarized in Table 17: 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 5.3.14: I/O port characteristics for more details on the input/output alternate

function characteristics.

Table 108. Quad SPI characteristics in SDR mode(1)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

F(QCK)

Quad SPI clock

frequency

1.71 < VDD< 3.6 V,

CLOAD = 15 pF

Voltage Range 1

MHz

1.71 < VDD< 3.6 V,

CLOAD = 20 pF

Voltage Range 2

110

tw(CKH) Quad SPI clock high

and low time

Even division

PRESCALER [7:0]

n =0,1, 3, 5 ...

t(CK)/2-0.5

t(CK)/2+1

tw(CKL)

t(CK)/2-1

t(CK)/2+0.5

tw(CKH) Quad SPI clock high

and low time

Odd division

PRESCALER [7:0]

n =2,4, 6, 8...

(n/2)*t(CK)/(n+1) - 0.5

(n/2)*t(CK)/(n+1) + 1

tw(CKL)

(n/2+1)*t(CK)/(n+1) - 1

(n/2+1)*t(CK)/(n+1) +0.5

ts(IN)

Data input setup time 1.71 < VDD< 3.6 V

th(IN)

Data input hold time

1.71 < VDD< 3.6 V

tv(OUT)

Data output valid

time

1.71 < VDD< 3.6 V

1.5

th(OUT) Data output hold time 1.71 < VDD< 3.6 V

0.5

1. Guaranteed by characterization results.

Table 109. QUADSPI characteristics in DDR mode(1)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

F(QCK)

Quad SPI clock

frequency

1.71 < VDD< 3.6 V,

CLOAD = 15 pF

Voltage Range 1

MHz

1.71 < VDD< 3.6 V,

CLOAD = 20 pF

Voltage Range 2

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