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WM9707

AC’97 Revision 2.1 Audio Codec with SPDIF Output

Wolfson Microelectronics plc 

Advanced Information

DETAILED TIMING DIAGRAMS

Test Characteristics:

AVDD = 5V, GND = 0V …………..TA = 0oC to +70oC, unless otherwise stated.

DVDD = 3.3V, GND = 0V …………..TA = 0oC to +70oC, unless otherwise stated.

All measurements are taken at 10% to 90% VDD, unless otherwise stated. All

the following timing information is guaranteed, not tested.

AC-LINK LOW POWER MODE

WM9707

SLOT 1 SLOT 2

SYNC

COLD RESET

BIT_CLK

SDATA_OUT

WRITE

TO 0X20

DATA PR4

tS2_PDOWN

SDATA_IN

DON’T

CARE

Figure 1 AC-Link Powerdown Timing

PARAMETER

SYMBOL

MIN

End of slot 2 to BITCLK SDATIN

low

tS2_PDOWN

TYP

MAX

1.0

UNIT

µs

RESETB

tRST_LOW

tRST2CLK

BIT_CLK

Figure 2 Cold Reset Timing

PARAMETER

RESETB active low pulse width

RESETB inactive to BIT_CLK

startup delay

SYMBOL

tRST_LOW

tRST2_CLK

MIN

1.0

162.8

TYP

MAX

UNIT

µs

ns

WOLFSON MICROELECTRONICS LTD

AI Rev 2.2 January 2001

7

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