Cirrus Logic CDB42428 - Manual (Page 7)

CDB42428
7
1.15 External Control Header Signals
OPT4 Input CS8416 digital audio interface input via optical
SPDIF TX - J2 Output CS8406 digital audio interface output via coax
SPDIF TX - OPT2 Output CS8406 digital audio interface output via optical
PC Port - J22 Input/Output
Parallel connection to computer for SPI / I
2
C control port signals
EXTERNAL CONTROL
HEADER - J17
Input/Output
I/O for SPI / I
2
C control port signals - see signal descriptions below
DSP HEADER - J36 Input/Output I/O for DSP serial port signals - see signal descriptions below
ANALOG IN LFT/RT Input RCA phono jacks for analog input signal to CS424xx internal ADCs
EXT A/D #1 LEFT/RIGHT Input RCA phono jacks for analog input signal to CS5361 ADC #1
EXT A/D #2 LEFT/RIGHT Input RCA phono jacks for analog input signal to CS5361 ADC #2
OUT_A1 to OUT_B4 Output RCA phono jacks for channels A1 to B4 analog outputs
JUMPER / SWITCH PURPOSE POSITION FUNCTION SELECTED
J37 Selects source of voltage for the
VLS supplies
+3.3 V
*+5 V
Voltage source is +3.3 V regulator
Voltage source is +5 V binding post
J38 Selects source of voltage for the
VD supply
+3.3 V
*+5 V
Voltage source is +3.3 V regulator
Voltage source is +5 V binding post
S2 Stand-Alone Mode Select SAM0
SAM1 Stand-Alone Modes are for debug use
and are presently unsupported
J9,J10,J11
J13,J15,J16
J18,J19,J20
J23,J25,J26
J28,J29,J30
J32,J34,J35
J39,J40,J41
J43,J45,J46
DAC Output Filter select - FILT *1
2
Selects standard 2-pole LPF
Selects instrumentation-amp/LPF/pad
*Default Factory Settings
Table 2. Jumper Settings
Header
Pin #
Signal Description Source Schematic Signal Name Buffer Buffer
Voltage
1 External Control Present Signal CTRL EXT_CONTROL_PRESENT- - -
2 Ground CDB GND - -
3
Address Bit 0 (I
2
C) / CS- (SPI)
CTRL AD0/CS 74VHC125 VLC
4 Ground CDB GND - -
5
Address Bit 1 (I
2
C) / CDIN (SPI)
CTRL AD1/CDIN 74VHC125 VLC
6 Ground CDB GND - -
7
SDA (I
2
C) / CDOUT (SPI) CTRL or CS424xx SDA/CDOUT MOSFET VLC
8 Ground CDB GND - -
9 Serial Control Port Clock CTRL SCL/CCLK 74VHC125 VLC
Table 3. CS424xx External Control Header Signals
Table 1. System Connections