PCIMX258CJM4A datasheet(107/144 Pages) FREESCALE

107 / 144 page

i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 3

Freescale Semiconductor

107

Note:

• All the timings for the SSI are given for a non-inverted serial clock polarity (TSCKP/RSCKP = 0) and a non-inverted frame sync

(TFSI/RFSI = 0). If the polarity of the clock and/or the frame sync have been inverted, all the timing remains valid by inverting

the clock signal STCK/SRCK and/or the frame sync STFS/SRFS shown in the tables and in the figures.

• All timings are on pads when SSI is being used for a data transfer.

• ”Tx” and “Rx” refer to the transmit and receive sections of the SSI.

• For internal frame sync operation using external clock, the FS timing is the same as that of Tx Data (for example, during AC97

mode of operation).

3.7.17.3

SSI Transmitter Timing with External Clock

Figure 80 shows the timing for the SSI transmitter with external clock. Table 81 describes the timing

parameters (SS22-SS46) shown in the figure.

Figure 80. SSI Transmitter with External Clock Timing Diagram

SS48

Oversampling clock high period

6.0

—

SS49

Oversampling clock rise time

—

3.0

SS50

Oversampling clock low period

6.0

—

SS51

Oversampling clock fall time

—

3.0

Table 80. SSI Receiver Timing with Internal Clock (continued)

Parameter

Min.

Max.

Unit

SS45

SS24

SS26

SS25

SS23

AUDn_TXC

AUDn_TXFS (bl)

AUDn_TXFS (wl)

AUDn_TXD

AUDn_RXD

Note: SRXD Input in Synchronous mode only

SS22

SS44

SS39

SS38

SS37

SS46

(Input)

(Output)

(Input)

SS29

SS27

SS31

SS33

PCIMX258CJM4A Datasheet(PDF) 107 Page - Freescale Semiconductor, Inc

PCIMX258CJM4A Datasheet(HTML) 107 Page - Freescale Semiconductor, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL