SPC572L64F2 datasheet(79/112 Pages) STMICROELECTRONICS

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SPC572Lx

Electrical characteristics

111

Figure 28. DSPI PCS strobe (PCSS) timing (master mode)

3.17.2.1.2 DSPI CMOS Master Mode – Modified Timing

PCSx

PCSS

tPCSC

tPASC

Table 42. DSPI CMOS master modified timing (full duplex and output only) – MTFE = 1, CPHA = 0

or 1(1)

Symbol

Characteristic

Condition

Value(2)

Unit

Pad drive(3)

Load (CL)Min

Max

1tSCK

D SCK cycle time

SCK drive strength

Very strong

25 pF

33.0

—

Strong

50 pF

80.0

—

Medium

50 pF

200.0

—

2tCSC

D PCS to SCK delay SCK and PCS drive strength

Very strong

25 pF

(N(4) × tSYS(5))–16

—ns

Strong

50 pF

(N(4) × tSYS(5))–16

—

Medium

50 pF

(N(4) × tSYS(5))–26

—

PCS medium

and SCK

strong

PCS = 50 pF

SCK = 50 pF

(N(4) × tSYS(5))–38

—

3tASC

D After SCK delay

SCK and PCS drive strength

Very strong

PCS = 0 pF

SCK = 50 pF

(M(6) × tSYS(5))–

—ns

Strong

PCS = 0 pF

SCK = 50 pF

(M(6) × tSYS(5))–

—

Medium

PCS = 0 pF

SCK = 50 pF

(M(6) × tSYS(5))–

—

PCS medium

and SCK

strong

PCS = 0 pF

SCK = 50 pF

(M(6) × tSYS(5))–

—

4tSDC

D SCK duty cycle(7)

SCK drive strength

Very strong

0pF

1/2tSCK –2

1/2tSCK +2 ns

Strong

0pF

1/2tSCK –2

1/2tSCK +2

Medium

0pF

1/2tSCK –5

1/2tSCK +5

PCS strobe timing

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