5 ac97 mode, Ac97 mode -39 – Freescale Semiconductor MCF5480 User Manual

Page 801

Advertising
background image

Functional Description

MCF548x Reference Manual, Rev. 3

Freescale Semiconductor

26-39

Figure 26-31. Waveform of Modem16 Mode

The function of this mode is the same as 8-bit modem mode except that the transmit/receive data length is

16 bit.

26.4.5

AC97 Mode

Figure 26-32

shows the waveform in AC97 modem mode.

Figure 26-32. Waveform of AC97 Mode

In AC97 mode, the PSCBCLK is the bit clock input and, different from 8/16 bit modem mode, the

PSCnRTS is the frame sync output.

Figure 26-33

shows an example connection to a AC97 CODEC chip.

Figure 26-33. An Example Connection to AC97 CODEC

PSCBCLK

D15

D12 D11

D14 D13

D10 D9

PSCFSYNC

PSCnTXD

PSCnRXD

D4 D3

D6 D5

D2 D1 D0

D8 D7

D15

D12 D11

D14 D13

D10 D9

D4 D3

D6 D5

D2 D1 D0

D8 D7

PSCBCLK

D15

D1 D0

D14

D19 D18

PSCnRTS

PSCnTXD

PSCnRXD

D19 D18

D0

D1

D1

D15

D1 D0

D14

D19 D18

D19 D18

D0

D1

D1

81.4 ns (12.288 MHz)

20.8 µs (48.0 kHz)

D0

D0

D15

D15

D14

D14

Slot #0 (16-bit)

Slot #1 (20-bit)

Slot #12 (20-bit)

BITCLK

SYNC

XTL_IN

XTL_OUT

SDATA_IN

RESET

SDATA_OUT

AC97 CODEC

PSC_BIT_CLK

PSC_RTS

PSC_RXD

PSC_TXD

PSC

Advertising
This manual is related to the following products: