STM32H745II datasheet(182/252 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32H745xI/G

182/252

DS12923 Rev 1

The following table summarizes the parameters measured in DDR mode.

tw(CKH)

QUADSPI clock high

and low time Even

division

PRESCALER[7:0] =

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

TCK/2–0.5

TCK/2

tw(CKL)

TCK/2

TCK/2+0.5

tw(CKH)

QUADSPI clock high

and low time Odd

division

PRESCALER[7:0] =

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

(n/2)*TCK/(n+1)-0.5

(n/2)*TCK/ (n+1)

tw(CKL)

(n/2+1)*TCK/(n+1)

(n/2+1)*TCK/

(n+1)+0.5

ts(IN)

Data input setup time

th(IN)

Data input hold time

3.5

tv(OUT)

Data output valid time

th(OUT)

Data output hold time

1. Guaranteed by characterization results.

Table 93. QUADSPI characteristics in SDR mode(1) (continued)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Table 94. QUADSPI characteristics in DDR mode(1)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Fck11/TCK

QUADSPI clock frequency

2.7<VDD<3.6 V

CL = 20 pF

100

MHz

1.62<VDD<3.6 V

CL = 15 pF

100

tw(CKH)

QUADSPI clock high and

low time Even division

PRESCALER[7:0] =

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

TCK/2–0.5

TCK/2

tw(CKL)

TCK/2

TCK/2+0.5

tw(CKH)

QUADSPI clock high and

low time Odd division

PRESCALER[7:0] =

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

(n/2)*TCK/

(n+1)-0.5

(n/2)*TCK/

(n+1)

tw(CKL)

(n/2+1)*TCK/

(n+1)

(n/2+1)*TCK /

(n+1)+0.5

tsr(IN), tsf(IN)

Data input setup time

1.5

thr(IN),thf(IN)

Data input hold time

3.5

tvr(OUT),

tvf(OUT)

Data output valid time

DHHC=0

DHHC=1

PRESCALER[7:0] =

1,2…

-TCK/4+1

TCK/4+2

thr(OUT),

thf(OUT)

Data output hold time

DHHC=0

DHHC=1

PRESCALER[7:0]=1

,2…

TCK/4

1. Guaranteed by characterization results.

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