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WM9711 Datasheet(PDF) 49 Page - Wolfson Microelectronics plc

Part # WM9711
Description  LOW POWER AUDIO CODEC FOR PORTABLE APPLICATIONS
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM9711 Datasheet(HTML) 49 Page - Wolfson Microelectronics plc

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Production Data
WM9711L
w
PD Rev 4.1 April 2004
49
AC-Link powerdown occurs when PR4 (register 26h, bit 12) is set (see “Power Management”
section).
PARAMETER
SYMBOL
MIN
TYP
MAX
UNIT
End of Slot 2 to BITCLK and SDATAIN
low
tS2_PDOWN
1.0
µs
COLD RESET (ASYNCHRONOUS, RESETS REGISTER SETTINGS)
RESETB
BITCLK
t
RST_LOW
t
RST2CLK
Figure 13 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
ns
WARM RESET (ASYNCHRONOUS, PRESERVES REGISTER SETTINGS)
Figure 14 Warm Reset Timing
PARAMETER
SYMBOL
MIN
TYP
MAX
UNIT
SYNC active high pulse width
tSYNC_HIGH
1.3
µs
SYNC inactive to BITCLK startup
delay
tRST2CLK
162.4
ns


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