92HD92 Datasheet, PDF (38/306 Pages) Integrated Device Technology – SINGLE CHIP PC AUDIO SYSTEM

92HD92
SINGLE CHIP PC AUDIO SYSTEM, CODEC+SPEAKER AMPLIFIER+CAPLESS HP+LDO
2.26.2. Left Justified Audio Interface
In Left Justified mode, the MSB is available on the first rising edge of SCLK following a LRCLK tran-
sition. The other bits are then transmitted in order. The LRCLK signal is high when left channel data
is present and low when right channel data is present.
Figure 11. Left Justified Audio Interface (assuming 24-bit word length)
Left Justified
Fs/2
LRCLK
Left Channel
Right Channel
SCLK
DOUT /
Previous Sample
L23 L22 L21 L20 L19 L18 L17 L16 L15 L14 L13 L12 L11 L10 L09 L08 L07 L06 L05 L04 L03 L02 L01 L00
0
DIN
Word Length (WL)
R23 R22 R21 R20 R19 R18 R17 R16 R15 R14 R13
2.26.3. Right Justified Audio Interface (assuming n-bit word length)
Right Justified
LRCLK
SCLK
DOUT /
DIN
Previous Sample
In Right Justified mode, the LSB is available on the last rising edge of SCLK before a LRCLK transi-
tion. All other bits are transmitted in order. The LRCLK signal is high when left channel data is pres-
ent and low when right channel data is present.
Figure 12. Right Justified Audio Interface (assuming 24-bit word length)
Fs/2
Left Channel
Right Channel
0
L23 L22 L21 L20 L19 L18 L17 L16 L15 L14 L13 L12 L11 L10 L09 L08 L07 L06 L05 L04 L03 L02 L01 L00
0
R23 R22 R21
Word Length (WL)
2.26.4. I²S Format Audio Interface
In I²S mode, the MSB is available on the second rising edge of SCLK following a LRCLK transition.
The other bits up to the LSB are then transmitted in order.
Figure 13. I²S Justified Audio Interface (assuming 24-bit word length)
I2S
LRCLK
Fs/2
Left Channel
Right Channel
SCLK
DOUT /
Previous Sample
L23 L22 L21 L20 L19 L18 L17 L16 L15 L14 L13 L12 L11 L10 L09 L08 L07 L06 L05 L04 L03 L02 L01 L00
0
DIN
Word Length (WL)
R23 R22 R21 R20 R19 R18 R17 R16 R15 R14 R13
2.27. Microphone Mute Input
The 92HD93 supports a microphone mute input. An external switch or other circuit may directly
mute the CODEC without relying on software control. This is a most helpful feature for allowing the
IDT CONFIDENTIAL
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92HD92