xCORE-AUDIO HiRes-2 DAC/HPA Reference Platform Hardware
Manual
IN THIS DOCUMENT
· Features
· xCORE-AUDIO processor device
· Analog audio output
· Digital audio output
· Audio clocking
· USB Connectivity
· General purpose user interface
· Quad SPI Flash Memory
· Power connector
· Operating requirements
· Dimensions
· xCORE-AUDIO HiRes-2 DAC/HPA Reference Platform schematics
· RoHS and REACH
The xCORE-AUDIO HiRes-2 DAC/HPA Reference Platform is a complete hardware and
reference software platform targeted at high resolution stereo DAC and Headphone
Amplifier applications.
The platform hardware is based around the XHRA-2HPA xCORE-AUDIO processor;
an xCORE-AUDIO device with an integrated High Speed USB 2.0 PHY. The xCOREAUDIO HiRes-2 DAC/HPA platform supports a high speed USB interface, streaming
2 output channels of bit-perfect audio at up to 384kHz. Ideal for high resolution
stereo DAC and headphone amplifier applications.
Publication Date: 2015/7/9
XMOS © 2015, All Rights Reserved
Document Number: XM008625C
xCORE-AUDIO HiRes-2 DAC/HPA Reference Platform Hardware Manual
1
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Features
The diagram below shows the key features of the xCORE-AUDIO HiRes-2 DAC/HPA
Reference Platform:
G
QUAD SPI
FLASH
C
I2S/ DSD
A
E
Figure 1:
xCOREAUDIO
HiRes-2
DAC/HPA
Reference
Platform
block
diagram
RESET
XHRA-2HPA
xCORE-AUDIO
HiRes-2
USB
MICRO
USB
DAC/ HPA
I2C
B
S/ PDIF
STEREO HP
JACK
MCLK
24M
F
D
CLOCK
GEN
XTAL
I2C
Si5351A
H
Q
MCLK_DAC
D
· A: xCORE-AUDIO (XHRA-2HPA) audio processing device
· B: Combined S/PDIF / stereo 3.5mm output jack
· C: 384kHz 32b audio DAC
· D: An ultra low-jitter programmable audio phase lock loop
· E: USB 2.0 micro-B jack
· F: Two general purpose LEDs
· G: 2MB Quad SPI flash memory
· H: 24MHz Oscillator
XM008625C
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xCORE-AUDIO processor device
xCORE-AUDIO HiRes-2 DAC/HPA Reference Platform is based on an xCORE-AUDIO
device (XHRA-2HPA). The xCORE-AUDIO HiRes family includes 2-channel, 5.1 and
7.1 USB audio high resolution interfaces. Audio data from PC, Mac, smartphones
and tablets can be streamed through the device to I2S, DSD and/or S/PDIF interfaces.
Sample rates of up to 384kHz, and sample depths of up to 32 bits are supported.
For information on xCORE-AUDIO processors see the xCORE-AUDIO High Resolution
Audio for Consumer Products1 .
PC
MAC
USB
USB
iOS
Android
USB
PHY
GPI
Figure 2:
xCOREAUDIO
device
Isochronous
Endpoint
Handler
Control
Endpoint
Handler
GPIO Control I2C
GPIO
I2C
1 https://www.xmos.com/products/silicon/xcore-audio
XM008625C
I2S
generation
DSD
generation
dev
ctrl
S/PDIF
generation
P
I
N
M
U
X
I2S
DSD
S/PDIF
xCORE-AUDIO HiRes-2 DAC/HPA Reference Platform Hardware Manual
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Analog audio output
Two single-ended analog output channels are provided. Each is fed from an ESS
9018Q2C DAC. The analog output uses a combined DLT13M1 connector.
J2: DLT13M1
Figure 3:
Analog audio
output
4
U5: 9018Q2C
Digital audio output
An optical digital audio transmitter is provided to enable digital audio output in
IEC60958 consumer mode (S/PDIF).
The data stream from the xCORE-AUDIO is re-clocked using the external master
clock to synchronize the data into the audio clock domain. This is achieved using
a simple external D-type flip-flop.
The optical output uses a combined DLT13M1 connector.
X1: FA238
U4: 74AHC1G79
Figure 4:
Optical audio
output
XM008625C
U5: 9018Q2C
J2: DLT13M1
xCORE-AUDIO HiRes-2 DAC/HPA Reference Platform Hardware Manual
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Audio clocking
A flexible clocking scheme is used for the xCORE-AUDIO processor and audio paths.
X1: FA238
Figure 5:
Clocking
circuit
U3: Si5351
To accommodate a multitude of clocking options, the low-jitter master clock is
generated locally using a frequency multiplier PLL chip. The chip used is a Silabs
5351A, which is pre-programmed to provide a 24MHz clock as a main processor
clock to the xCORE-AUDIO device, and either a 24.576 MHz or 22.5792MHz for
the audio path.
The Silabs 5351A device is controlled using I2C interface operating at 100KHz. See
the XHRA-2HPA datasheet for further information on the I2C bus.
6
USB Connectivity
The xCORE-AUDIO HiRes-2 DAC/HPA platform includes a micro-USB Type B connector for digital connections to devices running Windows, Mac OS X, iOS and
Android.
The figure below shows the layout of the USB subsection:
J1: MICRO USB TYPE B
Figure 6:
USB section
The connector is connected to the XHRA-2HPA device, which incorporates a dedicated USB 2.0 PHY device.
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General purpose user interface
Two green LEDs are provided for general purpose user interfacing. See the
XHRA-2HPA datasheet for further information on accessing user GPIO. The default firmware of this hardware platform uses D3 LED for USB connected status and
D2 LED for audio stream active status.
Figure 7:
User LEDs
8
D2: LED
D3: LED
Quad SPI Flash Memory
A 2MByte Quad SPI flash memory is provided to store xCORE-AUDIO device firmware
binary and configuration information. Configuration information includes the USB
Vendor and Product Identification (VID/PID), serial number, and GPIO and I2C
control commands. See Appendix A.2 of the XHRA-2HPA datasheet for further
information.
U2: IS25LQ016B
Figure 8:
Quad SPI
Flash
9
Power connector
The xCORE-AUDIO HiRes-2 DAC/HPA Platform has a 5V power source input via the
micro-USB cable.
The voltage is converted by the on-board regulator to the 1V and 3V3 supplies
used by the components. A separate ultra low-noise 3V3 voltage regulator is used
to power up the analog part of the DAC.
XM008625C
xCORE-AUDIO HiRes-2 DAC/HPA Reference Platform Hardware Manual
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Operating requirements
A USB 2.0 high-speed compliant cable of less than 3m in length should be used
when operating the xCORE-AUDIO HiRes-2 DAC/HPA Reference Platform. XMOS cannot guarantee correct operation of the xCORE-AUDIO HiRes-2 DAC/HPA Reference
Platform should any other cable be used.
This product is, like most electronic equipment, sensitive to Electrostatic Discharge
(ESD) events. Users should operate the xCORE-AUDIO HiRes-2 DAC/HPA Reference
Platform with appropriate ESD precautions in place.
11
Dimensions
The xCORE-AUDIO HiRes-2 DAC/HPA Reference Platform dimensions are 20x75mm.
The mounting holes are 2mm in diameter.
XM008625C
XM008625C
COC18
C18
PIC1702 PIC1802
100N
GND
100N
PIC170 PIC180
COC17
C17
3V3
PIC401
PIC402
2
PID102
USB_D_N
NC
IO1
GND
IO2
VCC
USB_D_N
GND
4
PID104
5
PID105
1
PID101
VBUS
S1
S2
S3
S4
S5
S6
PIJ10S6
S6
S1
S2
S3
COJ1
J1
PIX102 PIX104
GND
5
4
3
PIU303
2
PIU302
CLK0
CLK1
CLK2
GND
XB
VDDO
VDD
XA
SDA
SCL
7
1
PIU307
10
8
3V3
GND
PIU308
6
PIU306
9
PIU309
PIU3010
PIU301
PIFB102
MCLK_IN
24M
MCLK_DAC
120R
2A
PIFB101
COFB1
FB1
USB_D_N
USB_D_P
GND
100N
Si5351A-B04486-GT
COU3
U3
PIU304
PIU305
FA-238
25M
3
PIX103
SDA
SCL
GND
1
VBUS PIJ101
2
DM PIJ102
3
DP PIJ103
4
ID PIJ104
5
GND PIJ105
10118193
S5
PIJ10S5
S4
PIJ10S4
PIJ10S3
PIJ10S2
PIC20
C2
PIC201 COC2
VBUS
USB_D_N ON PIN 2 FOR FLOW THROUGH LAYOUT
TPD2E001
3
PID103
USB_D_P
PIJ10S1
COX1
X1
PIX101
1
GND
1N
COC4
C4
Figure 9:
xCOREAUDIO
HiRes-2
DAC/HPA
Reference
Platform
schematic (1
of 3)
2
4
100N
GND
PIC302
C3
PIC301 COC3
5V
PIC102
PIC10
4R7
COR3
R3
RST_N
COC7
C7
COC8
C8
COR6
R6
COR7
R7
PIR701
100N
PID201
PID202
PIC802
GND
PIR702
1K
1K
100N
PIR602
PIC602 PIC702
PIR601
100N
COC5
C5
PIC902
GREEN
COD2
D2
100N
GND
PID301
PID302
COC11
C11
GND
100N
GREEN
100N
MCLK_IN
SPDIF_OUT
100N
PIC1302 PIC1402
PIC130 PIC140
COC13
C13
NLMCLK0IN
MCLK_IN
1
2
CP
D
100N
COC16
C16
74AHC1G79
PIU402
D
COU4
U4
100N
COC15
C15
PIC1502 PIC1602
PIU401
100N
COC14
C14
PIC150 PIC160
SPI_CS_N
SPI_CLK
QSPI_D0
QSPI_D1
QSPI_D2
QSPI_D3
GND
65
PIU1065
54
PIU1054
12
PIU1012
15
PIU1015
17
PIU1017
18
PIU1018
19
PIU1019
11
PIU1011
Q
GND
Q
VCC
PITP501
I2S_DATA_DSD_R PITP101
I2S_BCLK_DSD_CLKPITP201
I2S_LRCK_DSD_L PITP301
NLLEDA
35
LEDA
NLLEDB
36
LEDB
PIU1036
37
PIU1037
38
DAC_RST_N
PIU1038
5
PIU105
6
PIU106
7
PIU107
8
PIU108
PIU1035
48
PIU1048
46
PIU1046
51
PIU1051
50
PIU1050
PIU1049
PIU1047
47
49
45
PIU1045
43
PIU1043
PIU1028
64
PIU1064
NLSPDIF0OUT
SPDIF_OUT
100N
COC12
C12
PLLVSS
GND
SPI_CS_N
SPI_CLK
QSPI_D0
QSPI_D1
QSPI_D2
QSPI_D3
GPIO_0
GPIO_1
GPIO_2
GPIO_3
GPIO_4
GPIO_5
GPIO_6
GPIO_7
GPI_0
GPI_1
GPI_2
GPI_3
GPI_4
GPI_5
GPI_6
GPI_7
PIC10 2 PIC1 02 PIC120
COC10
C10
2
42
PIU1042
1
PIU101
4
PIU104
PIU102
28
SDA
SDATA
29
SCL
SCLK PIU1029
MCLK
SPDIF
DOUT
BCLK
LRCK
PIC10 PIC1 0 PIC120
1V0
COD3
D3
XHRA-2HPA
USB_DP
USB_DM
USB_VBUS
USB_RTUNE
100N
COC6
C6
GND
PIR501
25
26
24
PIU1024
23
PIU1023
PIU1026
PIU1025
COC9
C9
43R2
PIR502
NLUSB0D0N
USB_D_N
58
CLK
57
PIU1057 RST_N
PIU1058
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
PLLVDD
VDD
VDD
VDD
VDD
VDD
VDD
VDD
VDD
VDD
VDD
USB_VDD
PIC502
GND
LEDA
LEDB
PITP901
63
PIU1063
62
PIU1062
PIU1061
PITP801
PIU1060
PIU1033
33
60
61
32
PIU1032
30
PIU1030
PITP701
NLUSB0D0P
USB_D_P
COR5
R5
14
21
PIU1021
16
PIU1016
PIU1014
PIU1053
53
9
PIU109
10
PIU1010
20
PIU1020
31
PIU1031
39
PIU1039
40
PIU1040
41
PIU1041
52
PIU1052
56
PIU1056
59
PIU1059
27
PIU1027
55
PIU1055
44
PIU1044
34
PIU1034
USB_VDD33
VDDIO
VDDIO
VDDIO
VDDIO
VDDIO
COU1
U1
PITP601
NL24M
24M
COTP6
TP6
COTP7
TP7
COTP8
TP8
COTP9
TP9
22
13
PIU1013
3
PIU103
PIU1022
PIC501 PIC601 PIC701 PIC801 PIC901
3V3
5V
GND
100N
COC1
C1
PIR301
PIR302
1V0
1V0
3V3
3
PIR101
PIR102
2K2
COR8
R8
PIR801
3V3
33R
PIR802
NLSPI0CS0N
SPI_CS_N
NLSPI0CLK
SPI_CLK
PIR401
PIR402
1K
COR4
R4
3V3
COU2
U2
COTP17
TP17
COTP16
TP16
SPDIF_TX
100N
COC19
C19
GND
PIC1902
PIC1901
3V3
GND
4
PIU204
3V3
GND
QSPI FLASH
IS25LQ016B
16MBIT
6
SCK
1
PIU201 CS_N
PIU206
8
PIU208
NLSPDIF0TX
SPDIF_TX
NLDAC0RST0N
DAC_RST_N
NLSDA
SDA
NLSCL
SCL
NLMCLK0DAC
MCLK_DAC
GND
100N
C49
PIC4901COC49
PIC4902
3V3
NLI2S0BCLK0DSD0CLK
I2S_BCLK_DSD_CLK
NLI2S0LRCK0DSD0L
I2S_LRCK_DSD_L
NLI2S0DATA0DSD0R
I2S_DATA_DSD_R
SI/IO0
VCC
SO/IO1
3
PIU203
WP_N/IO2
7
PIU207
HOLD_N/IO3
2
PIU202
PIU205
5
PITP1601
PITP1701
COR2
R2
PIR201
2K2
PIR202
3V3
COR1
R1
3V3
NLQSPI0D0
QSPI_D0
NLQSPI0D1
QSPI_D1
NLQSPI0D2
QSPI_D2
NLQSPI0D3
QSPI_D3
GND
PIU403
4
PIU404
5
PIU405
COTP5
TP5
COTP1
TP1
COTP2
TP2
COTP3
TP3
Date
Size
A3
COTP12
TP12
COTP13
TP13
TP14
COTP14
COTP15
TP15
PITP1401
PITP1501
PITP1301
COTP11
TP11
PITP1001
PITP1201
PITP1101
COFM1
FM1
FIDUCIAL
COFM2
FM2
FIDUCIAL
COFM3
FM3
FIDUCIAL
GND
5V
NLRST0N
RST_N
COTP10
TP10
09-07-2015
Sheet
1
Sheet Name
xCORE-AUDIO_.SchDoc
of
Project Name
xCORE-AUDIO Ref Design
POR
U_Power
Power.SchDoc
SPDIF_TX
RESETB
SDA
SCL
MCLK
DATA_CLK
DATA1
DATA2
U_DAC_HP
DAC_HP.SchDoc
3
Rev
2V1
12
COD1
D1
xCORE-AUDIO HiRes-2 DAC/HPA Reference Platform Hardware Manual
8/12
xCORE-AUDIO HiRes-2 DAC/HPA Reference Platform schematics
C34
PIR1501 PIR2301 PIR2401
PIR1502 PIR2302 PIR2402
GND
3V3DAC
COR15COR23COR24
GND
2U2
2U2
GND
C33
C32
2U2
C36
COU5A
COU5B
U5A
XO
XI_MCLK
24
GND
7
PIU507
PIU5024
10
PIU5010
8
PIU508
9
PIU509
21
PIU5021
23
PIU5023
22
PIU5022
PIC3801
PIC3802
GND
22U
PIC3901
PIC3902
25
6
19
VREF
ANEG
PNEG
C2
C1
SABRE9018Q2C
PIU5019
12
PIU5012
13
PIU5013
15
PIU5015
16
PIU5016
PIU5018
VCCA
18
APOS
17
PIU5017 AVCC_CP
27
PIU5027
AVCC_L
AVCC_R
U5B
PIU506
PIU5025
GND
4U7
COC38
C38COC39
C39
COC37
C37
4U7
PIC3701 PIC3702
3V3A
4R7
PIR902
NC
DVDD
GND_PAD
DGND
DGND
AGND_L
AGND_R
AGND_CP
AGND
AGND
41
C30
4U7
GND
4U7
C31
3V3DAC
GND
COTP20
PIT201
GND
COTP19
PIT190
C22
GND
GND
100N
PIC2701
PIC270
3V3
GND
PIT180
COTP18
TP18
3V3
1
PIC2801
PIC280
Date
Size
A4
09-07-2015
Sheet
Sheet Name
DAC_HP.SchDoc
2
of
Project Name
xCORE-AUDIO Ref Design
GND
100N
C29
PIC2901 COC29
PIC290
3V3DAC
GND
100N
C25
OPT TX
PIC2501 COC25
PIC2502
3V3
DLT13M1
PIJ201
3
PIJ203
5
PIJ205
4
PIJ204
2
PIJ202
GND
10U
C28
120RCOC28
2A
COJ2
J2
VCC
8
VIN
6
PIJ206
GND
PIJ208
7
PIJ207
GND
PIFB201
COFB2
FB2
GND
PID501
PID502
PIFB202
COD4 COD5
COC27
C27
100P
GND
100P
C23
POSPDIF0TX
SPDIF_TX
PIC2 01 COC22
PIC2301 COC23 PID402
PIC2 0 PIC2302
PID401
PIC30 1 COC30PIC310 COC31
PIC30 2 PIC3102
GND
2N2
PIC2602
GND
PIU5041
29
37
PIU5037
PIU5029
PIU5011
11
PIU5014
4
PIU504
PIU505
5
14
26
PIU5026
30
28
PIU5030
PIU5028
20
PIU5020
COC26
C26
PIC2601
806R
COR14
R14
PIR1402
PIR1401
806R
PIR1301
2N2
PIC2402
4R7
PIR1202
2N2
PIC2102
806R
PIR1101
806R
PIR1001
2N2
PIC2002
COR13
R13
PIR1302
COC24
C24
PIC2401
COR12
R12
PIR1201
COC21
C21
PIC2101
COR11
R11
PIR1102
COR10
R10
PIR1002
DVCC
DMODE = 0 => NORMAL SERIAL MODE
ADDR = 0 => I2C SLAVE ADDRESS = 7'b1001000 = 0x48
GPIO2 = 0 => DISABLE WEAK CHARGE PUMP IN RESET
SABRE9018Q2C
3
PIU503
PIU502
2
36
PIU5036
40
AUX_L
AUX_R
INR
ADDR
PIU5040
38
39
PIU5039
RESETB
INBR
SCL
SDA
OUTR
INL
PIU5038
PIU5031
GPIO1
GPIO2
DMODE
INBL
OUTL
PIU5032
32
31
1
PIU501
35
PIU5035 DATA_CLK
34
PIU5034
DATA1
33
PIU5033
DATA2
GND
10U
GND
10U
C35
PIC3201 COC32
PIC3 01 COC33
PIC3401 COC34COC35COC36
PIC3501 PIC3601
PIC320 PIC3 02 PIC3402
PIC3502 PIC3602
3V3A
POMCLK
MCLK
PORESETB
RESETB
POSCL
SCL
POSDA
SDA
PODATA1
DATA1
PODATA2
DATA2
PODATA0CLK
DATA_CLK
10K
10K
10K
R15
R23
R24
TP19
TP20
COC20
C20
PIC2001
D4
XM008625C
ESD9B5.0ST5G
D5
Figure 10:
xCOREAUDIO
HiRes-2
DAC/HPA
Reference
Platform
schematic (2
of 3)
ESD9B5.0ST5G
COR9
R9
PIR901
3
Rev
2V1
xCORE-AUDIO HiRes-2 DAC/HPA Reference Platform Hardware Manual
9/12
XM008625C
PIC4301
PIC4302
5V
GND
4U7
COC43
C43
5V
4R7
PIC4701
PIC4702
GND
2U2
COC47
C47
PIR2202
COR22
R22
PIR2201
GND
EN
VIN
1
NC
5
4
PIC4 01
PIC4 02
PIR1802
GND
PIR2101
PIR2102
PIR1801
10K
GND
2U2
C48
PIC4801 COC48
PIC4802
3V3A
R19
330R
GND
10U
GND
COR21
R21
GND
330P
C45
1V0
COTP23
TP23
COTP22
TP22
COTP21
TP21
PIR1902
PIC4501 COC45
COR19
PIC4502 PIR1901
GND
2U2
C41
PIC410 COC41
PIC4102
3V3
COC44
C44
COR18
R18
10K
4
PIU604
5
PIU605
GND
PIU1004
PIU1005
2U2
VOUT
LP5907MFX-3.3
GND
PIU1002
2
EN
VIN
PIU1003
3
4
PIU804
PIL102
NC
VOUT
COL1
L1
5
PIU805
PIL101
COU10
U10
FB
SW
GND
EN
TLV70233
PIU602
2
3
PIU603
VIN
COU6
U6
1
PIU601
GND
PIU1001
GND
5V
LM3674-ADJ
2
PIU802
PIU803
3
GND
1U
PIC40 1
PIC40 2
COU8
U8
1
PIU801
GND
PG_3V3
Figure 11:
xCOREAUDIO
HiRes-2
DAC/HPA
Reference
Platform
schematic (3
of 3)
COC40
C40
5V
PITP2301
PITP2201
PITP2101
GND
PIR20 1
PIR20 2
PIR1701
PIR1702
1V0
10K
COR20
R20
COR17
R17
3K9
1V0
100N
PIC4601
PIC4602
3V3A
5
1
CEXT
ENIN
ADM1085
PIU905
PIU901
VIN
COU9
U9
3
PIU903
GND
2N2
COC46
C46
3V3
OUT_N
STM1061N28WX
VSS
PG_3V3
GND
2
PIU702
VCC
COU7
U7
3
PIU703
3V3
COC42
C42
GND
PIC4201
PIC420
3V3
GND
ENOUT
VCC
1
PIU701
PIR1601
PIR1602
Date
Size
A4
2
4
POPOR
POR
09-07-2015
Sheet
Sheet Name
Power.SchDoc
3
of
Project Name
xCORE-AUDIO Ref Design
GND
PIU902
PIU904
6
PIU906
3V3
NLPG03V3
PG_3V3
COR16
R16
10K
3V3
3
Rev
2V1
xCORE-AUDIO HiRes-2 DAC/HPA Reference Platform Hardware Manual
10/12
xCORE-AUDIO HiRes-2 DAC/HPA Reference Platform Hardware Manual
13
11/12
RoHS and REACH
The xCORE-AUDIO HiRes-2 DAC/HPA Reference Platform complies with appropriate
RoHS2 and REACH regulations and is a Pb-free product.
The xCORE-AUDIO HiRes-2 DAC/HPA Reference Platform is subject to the European
Union WEEE directive and should not be disposed of in household waste. Alternative
requirements may apply outside of the EU.
XM008625C
xCORE-AUDIO HiRes-2 DAC/HPA Reference Platform Hardware Manual
12/12
Copyright © 2015, All Rights Reserved.
Xmos Ltd. is the owner or licensee of this design, code, or Information (collectively, the “Information”) and
is providing it to you “AS IS” with no warranty of any kind, express or implied and shall have no liability in
relation to its use. Xmos Ltd. makes no representation that the Information, or any particular implementation
thereof, is or will be free from any claims of infringement and again, shall have no liability in relation to any
such claims.
XM008625C