DSP56364 datasheet(65/148 Pages) FREESCALE

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Enhanced Serial Audio Interface Timing

DSP56364 Technical Data, Rev. 4.1

Freescale Semiconductor

3-49

459

FST input (wl) to transmitter #0 drive enable

assertion

—

31.0

—

460

FST input (wl) setup time before TXC falling

edge

——

2.0

21.0

—

x ck

i ck

461

FST input hold time after TXC falling edge

—

4.0

0.0

—

x ck

i ck

462

Flag output valid after TXC rising edge

—

32.0

18.0

x ck

i ck

463

HCKR/HCKT clock cycle

—

40.0

—

464

HCKT input rising edge to TXC output

—

27.5

465

HCKR input rising edge to RXC output

—

27.5

1 V

CC = 3.16 V ± 0.16 V; TJ = 0°C to +105°C, CL = 50 pF.

2 i ck = internal clock

x ck = external clock

i ck a = internal clock, asynchronous mode (asynchronous implies that TXC and RXC are two different clocks)

i ck s = internal clock, synchronous mode (synchronous implies that TXC and RXC are the same clock)

3 bl = bit length

wl = word length

wr = word length relative

4 TXC (SCKT pin) = transmit clock

RXC (SCKR pin) = receive clock

FST (FST pin) = transmit frame sync

FSR (FSR pin) = receive frame sync

HCKT (HCKT pin) = transmit high speed clock

HCKR (HCKR pin) = receive high speed clock

5 For the internal clock, the external clock cycle is defined by Icyc and the ESAI control register.

6 The word-relative frame sync signal waveform relative to the clock operates in the same manner as the bit-length frame sync

signal waveform, but spreads from one serial clock before first bit clock (same as bit length frame sync signal), until the one

before last bit clock of the first word in frame.

7 Periodically sampled and not 100% tested

Table 3-20 Enhanced Serial Audio Interface Timing (continued)

No.

Characteristics1, 2, 3

Symbol

Expression

Min

Max

Condition4 Unit

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