WM8978 Wolfson Microelectronics Ltd., WM8978 Datasheet - Page 16

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WM8978

Manufacturer Part Number
WM8978
Description
The WM8978 is a low power, high quality stereo codec designed for portable applications such as Digital still camera or Digital Camcorde
Manufacturer
Wolfson Microelectronics Ltd.
Datasheet

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WM8978
AUDIO INTERFACE TIMING – SLAVE MODE
Note:
BCLK period should always be greater than or equal to MCLK period.
w
Test Conditions
DCVDD=1.8V,
MCLK=256fs, 24-bit data, unless otherwise stated.
PARAMETER
Audio Data Input Timing Information
LRC propagation delay from BCLK falling edge
ADCDAT propagation delay from BCLK falling edge
DACDAT setup time to BCLK rising edge
DACDAT hold time from BCLK rising edge
Test Conditions
DCVDD=1.8V, DBVDD=AVDD=SPKVDD=3.3V, DGND=AGND=SPKGND=0V, T
MCLK= 256fs, 24-bit data, unless otherwise stated.
PARAMETER
Audio Data Input Timing Information
BCLK cycle time
BCLK pulse width high
BCLK pulse width low
LRC set-up time to BCLK rising edge
LRC hold time from BCLK rising edge
DACDAT hold time from BCLK rising edge
ADCDAT propagation delay from BCLK falling edge
DBVDD=AVDD=SPKVDD=3.3V,
Figure 3 Digital Audio Data Timing – Slave Mode
DGND=AGND=SPKGND=0V,
SYMBOL
SYMBOL
t
t
t
t
LRSU
t
BCH
t
t
BCY
BCL
LRH
DH
DD
t
t
t
t
DDA
DST
DHT
DL
A
=+25
MIN
MIN
10
10
50
20
20
10
10
10
T
A
o
=+25
C, Slave Mode, fs=48kHz,
o
C,
TYP
TYP
PTD Rev 2.6 November 2005
Slave
Preliminary Technical Data
Mode,
MAX
MAX
10
10
10
fs=48kHz,
UNIT
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
16