WM9705 datasheet(13/55 Pages) WOLFSON

No de pièce	WM9705

Description	Multimedia AC97 CODEC with Integrated Touch Screen Controller

PDF	55 Pages

Scroll/Zoom	100%

Fabricant	WOLFSON [Wolfson Microelectronics plc]

Site Internet	http://www.wolfsonmicro.com

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13 / 55 page

WM9705

Production Data

PD Rev 4.0 December 2003

DETAILED TIMING DIAGRAMS

Test Characteristics:

AVDD = 3.3V, DVDD = 3.3V, AGND = 0V …………..TA = 0

oC to +70oC, unless otherwise stated.

All measurements are taken at 10% to 90% DVDD, unless otherwise stated. All the following timing information is guaranteed,

not tested.

AC-LINK LOW POWER MODE

SYNC

BITCLK

SDATAOUT

WRITE

TO 0X20

DATA PR4

DON'T

CARE

SDATAIN

SLOT 1

SLOT 2

S2_PDOWN

Figure 4 AC-Link Powerdown Timing

PARAMETER

SYMBOL

MIN

TYP

MAX

UNIT

End of slot 2 to BITCLK SDATAIN

low

tS2_PDOWN

1.0

µs

COLD RESET

RESETB

BITCLK

RST_LOW

RST2CLK

Figure 5 Cold Reset Timing

Note:

For correct operation SDATAOUT and SYNC must be held LOW for entire RESETB active low

period otherwise the device may enter test mode. See AC’97 specification or Wolfson

applications note WAN104 for more details.

PARAMETER

SYMBOL

MIN

TYP

MAX

UNIT

RESETB active low pulse width

tRST_LOW

1.0

µs

RESETB inactive to BITCLK

startup delay

tRST2CLK

162.8

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