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PCM5121_14 Datasheet, PDF (3/108 Pages) Texas Instruments – 2VRMS DirectPath™, 112/106dB Audio Stereo DAC with 32-bit, 384kHz PCM Interface
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PCM5121, PCM5122
www.ti.com
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SLAS763A – AUGUST 2012 – REVISED SEPTEMBER 2012
DEVICE INFORMATION
PCM512x pin assignments-1 MODE1 tied DVDD : SPI mode
PCM512x (top view)
TERMINAL
NAME
PIN
CPVDD
1
CAPP
2
CPGND
3
CAPM
4
VNEG
5
OUTL
6
OUTR
7
AVDD
8
AGND
9
VCOM
10
MOSI
11
MC
12
GPIO5
13
GPIO4
14
GPIO3
15
GPIO2
16
MODE1
17
MS (MODE2)
18
GPIO6
19
SCK
20
BCK
21
DIN
22
LRCK
23
MISO (GPIO1)
24
XSMT
25
Table 2. PCM512x SPI mode Terminal Functions
I/O DESCRIPTION
-
Charge pump power supply, 3.3V
O Charge pump flying capacitor terminal for positive rail
-
Charge pump ground
O Charge pump flying capacitor terminal for negative rail
O Negative charge pump rail terminal for decoupling, -3.3V
O Analog output from DAC left channel
O Analog output from DAC right channel
-
Analog power supply, 3.3V
-
Analog ground
VCOM output (Optional mode selected by register; default setting is VREF mode.) When in
O VREF mode (default), this pin ties to GND. When in VCOM mode, decoupling capacitor to
GND is required.
I
Input data for SPI(1)
I
Input clock for SPI(1)
I/O General purpose digital input and output port
I/O General purpose digital input and output port
I/O General purpose digital input and output port
I/O General purpose digital input and output port
I
Mode control selection pin(1)
• MODE1=Low, MODE2=Low : Hardwired mode
• MODE1=Low, MODE2=High : I2C mode
I
• MODE1=High : SPI mode, MODE2 pin changes MS pin (chip select for
SPI)
I/O General purpose digital input and output port
I
System clock input(1)
I/O Audio data bit clock input (slave) or output (master)(1)
I
Audio data input(1)
I/O Audio data word clock input (slave) or output (master)(1)
I/O
Primary output data for SPI readback
Secondary; general purpose digital input/output port controlled by register
I
Soft mute control(1) Soft mute (Low) / soft un-mute (High)
(1) Failsafe LVCMOS Schmitt trigger input.
Copyright © 2012, Texas Instruments Incorporated
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Product Folder Links: PCM5121 PCM5122
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