wm8918 Wolfson Microelectronics plc, wm8918 Datasheet - Page 21

• Manufacturer Part Number: wm8918
• Description: Ultra Low Power Dac For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

Production Data
Figure 4 Audio Interface Timing - TDM Mode
w
AIFTXDAT
Test Conditions
AVDD = CPVDD = 1.8V , DGND=AGND=CPGND= =0V, T
unless otherwise stated.
Audio Data Timing Information
AIFTXDAT setup time from BCLK falling edge
AIFTXDAT release time from BCLK falling edge
BCLK
AIFTXDAT undriven (tri-state)
PARAMETER
AIFTXDAT set-up time
TDM MODE
In TDM mode, it is important that two devices do not attempt to drive the AIFTXDAT pin
simultaneously. The timing of the WM8918 AIFTXDAT tri-stating at the start and end of the data
transmission is described below.
AIFTXDAT valid (DMIC output)
A
= +25
DCVDD =2.0V
1.08V DBVDD
1.08V DBVDD
CONDITIONS
2.0V DBVDD
o
C, Master Mode, fs=48kHz, MCLK=256fs, 24-bit data,
DCVDD =
DCVDD =
DCVDD =
DBVDD =
= 1.62V
= 1.62V
= 3.6V
3.6V
AIFTXDAT release time
AIFTXDAT valid
MIN
TYP
PD, Rev 4.0, September 2010
15
15
5
5
AIFTXDAT undriven (tri-state)
MAX
WM8918
UNIT
ns
ns
ns
ns
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