CS42L51_07 Datasheet, PDF (7/88 Pages) Cirrus Logic – Low Power, Stereo CODEC with Headphone Amp

1. PIN DESCRIPTIONS - SOFTWARE (HARDWARE) MODE
CS42L51
32 31 30 29 28 27 26 25
LRCK 1
SDA/CDIN (MCLKDIV2) 2
SCL/CCLK (I²S/LJ) 3
ADO/CS (DEM) 4
VA_HP 5
FLYP 6
GND_HP 7
FLYN 8
CS42L51
24 AIN1B
23 AIN1A
22 AFILTB
21 AFILTA
20 AIN2B/BIAS
19 AIN2A
18 MICIN2/BIAS/AIN3B
17 MICIN1/AIN3A
9 10 11 12 13 14 15 16
Pin Name
LRCK
SDA/CDIN
(MCLKDIV2)
SCL/CCLK
(I²S/LJ)
AD0/CS
(DEM)
VA_HP
FLYP
GND_HP
FLYN
VSS_HP
#
Pin Description
1 ^{Left Right Clock (Input/Output) - Determines which channel, Left or Right, is currently active on the}
serial audio data line.
Serial Control Data (Input/Output) - SDA is a data I/O in I²C Mode. CDIN is the input data line for the
2 ^{control port interface in SPI Mode.}
MCLK Divide by 2 (Input) - Hardware Mode: Divides the MCLK by 2 prior to all internal circuitry.
Serial Control Port Clock (Input) - Serial clock for the serial control port.
3 _{Interface Format Selection (Input) - Hardware Mode: Selects between I²S & Left-Justified interface for-}
mats for the ADC & DAC.
Address Bit 0 (I²C) / Control Port Chip Select (SPI) (Input) - AD0 is a chip address pin in I²C Mode; CS
4 ^{is the chip-select signal for SPI format.}
De-Emphasis (Input) - Hardware Mode: Enables/disables the de-emphasis filter.
5 _{Analog Power For Headphone (Input) - Positive power for the internal analog headphone section.}
6 _{Charge Pump Cap Positive Node (Input) - Positive node for the external charge pump capacitor.}
7 Analog Ground (Input) - Ground reference for the internal headphone/charge pump section.
8 _{Charge Pump Cap Negative Node (Input) - Negative node for the external charge pump capacitor.}
9 ^{Negative Voltage From Charge Pump (Output) - Negative voltage rail for the internal analog head-}
phone section.
DS679F1
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