IMX53CEC datasheet(71/204 Pages) FREESCALE

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Electrical Characteristics

i.MX53xD Applications Processors for Consumer Products, Rev. 2

Freescale Semiconductor

4.7.2.4

ECSPI Slave Mode Timing

Figure 33 depicts the timing of ECSPI in slave mode. Table 48 lists the ECSPI slave mode timing

characteristics.

4.7.3

Enhanced Serial Audio Interface (ESAI) Timing Parameters

The ESAI consists of independent transmitter and receiver sections, each section with its own clock

generator. Table 49 shows the interface timing values. The number field in the table refers to timing signals

found in Figure 34 and Figure 35.

CS9

MISO Hold Time

tHmiso

0—

CS10

RDY to SSx Time2

tSDRY

5—

1 See specific I/O AC parameters Section 4.5, “I/O AC Parameters”

2 SPI_RDY is sampled internally by ipg_clk and is asynchronous to all other CSPI signals.

Table 48. ECSPI Slave Mode Timing Parameters

Parameter

Symbol

Min

Max

Unit

CS1

SCLK Cycle Time–Read

SCLK Cycle Time–Write

tclk

—ns

CS2

SCLK High or Low Time–Read

SCLK High or Low Time–Write

tSW

—ns

CS4

SSx pulse width

tCSLH

Half SCLK period

—

CS5

SSx Lead Time (CS setup time)

tSCS

5—

CS6

SSx Lag Time (CS hold time)

tHCS

5—

CS7

MOSI Setup Time

tSmosi

4—

CS8

MOSI Hold Time

tHmosi

4—

CS9

MISO Propagation Delay (CLOAD =20pF)

tPDmiso

417

Table 49. Enhanced Serial Audio Interface (ESAI) Timing

No.

Characteristics1’2,3

Symbol

Expression3

Min

Max

Condition4 Unit

Clock cycle5

tSSICC

× T

30.0

—

i ck

Clock high period

• For internal clock

—2

× T

c − 9.0

—

• For external clock

—

× T

—

Table 47. ECSPI Master Mode Timing Parameters (continued)

Parameter

Symbol

Min

Max

Unit

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