XMOS XC-1A Manuale utente
XC-1A Hardware Manual (1.2) 2/18
1 Introduction
The XC-1A is a card-sized development board based on the XMOS XS1-G4 event-driven
processor device. It comprises a single XS1-G4, 16 user-configurable LEDs, four push-
buttons, a speaker, JTAG and serial interfaces, four expansion areas suitable for IDC
headers and a through-hole prototyping area for connecting external components.
The diagram below shows the layout of the main components on the card:
AG
CC
C
C
C
B
BB
B
B
B
B
B
B
B
B B
F
E E
EE
D
D
D
D
AXS1-G4 Device
BTwelve Red/Green User LEDs
CFour Green User LEDs
DFour Push-Button Switches
EFour I/O Expansion Areas
FPrototyping Area
GSpeaker
H
L
I
K
J
HMini USB-B Connector
I20MHz Crystal Oscillator
JUSB 2.0 to JTAG
KSPI FLASH
LExternal 5V Connector
The XC-1A Development Kit also includes a USB cable for powering and booting
the device from a PC. The card is fitted with four plastic feet, which are useful for
building bigger prototyping systems.
The following sections in this document provide a detailed description of these
components.
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XC-1A Hardware Manual (1.2) 3/18
2 XS1-G4 Device [A]
The XC-1A provides a single XS1-G4 device in a 512BGA package. The XS1-G4 device
contains four multithreaded XCore
™
processing components with tightly integrated
support for communication, I/O and timing. The pins on XCore processors are
brought out of the package and connected to the card’s components as follows:
Processor 0
•Three red/green and four green LEDs
•Four push-button switches
•Speaker
•SPI FLASH memory
•Prototyping area
•One 16-way I/O expansion header (16 I/O bits)
Processor 1, 2
•Three red/green LEDs
•One 16-way I/O expansion header (16 I/O bits)
Processor 3
•Three red/green LEDs
•Two 16-way I/O expansion headers (16 I/O bits)
The processors have ports that are directly connected to the I/O pins. Examples of
how to write software that interfaces over these ports with the XC-1A components is
provided in a separate tutorial [1].
3 User-configurable LEDs [B and C]
The XC-1A has 16 user-configurable LEDs. Four LEDs are positioned next to the four
push-buttons (collectively referred to as button-LEDs) and contain green diodes. The
other 12 LEDs are positioned around the XS1-G4 in a circle (collectively referred to as
clock-LEDs) and contain red/green diodes. A Roman numeral is printed next to each
LED. The layout of the LEDs is shown on the following page.
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XC-1A Hardware Manual (1.2) 4/18
XII
VI
A
B
C
D
VII
VIII
IX
XI
V
IIII
III
II
I
X
G
G
G
G
To reduce the number of pins required for the 12 clock-LEDs, the LED anodes are
connected to four 8-bit ports (8D) on processor 0, 1, 2 and 3 and the cathodes are
connected to two 1-bit ports (1E for green, 1F for red) on processor 0.
The schematic for the clock-LEDs is shown below
I II III IIII V VI VII VIII IX X XI XII
X1D40
PORT_CLOCKLED_1 PORT_CLOCKLED_2 PORT_CLOCKLED_3PORT_CLOCKLED_0
X1D41 X1D42 X2D40 X2D41 X2D42 X3D40 X3D41 X3D42X0D40 X0D41 X0D42
PORT_CLOCKLED_SELG
X0D12
PORT_CLOCKLED_SELR
0
0
1
1
PORT_CLOCKLED_SELG
0
1
0
1
Colour
Off
Green
Red
Red
To get yellow, alternate green/red in 4:1 ratio
PORT_CLOCKLED_SELR
X0D13
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XC-1A Hardware Manual (1.2) 5/18
The clock-LED pins are mapped to ports on the XS1-G4 as shown in the table below:
Pin Port Processor
1b 8b
XCore0
X0D40 P8D4 PORT_CLOCKLED_0 [I]
X0D41 P8D5 PORT_CLOCKLED_0 [II]
X0D42 P8D6 PORT_CLOCKLED_0 [III]
X0D12 P1E0 PORT_CLOCKLED_SELG
X0D13 P1F0 PORT_CLOCKLED_SELR
XCore1
X1D40 P8D4 PORT_CLOCKLED_1 [IV]
X1D41 P8D5 PORT_CLOCKLED_1 [V]
X1D42 P8D6 PORT_CLOCKLED_1 [VI]
XCore2
X2D40 P8D4 PORT_CLOCKLED_2 [VII]
X2D41 P8D5 PORT_CLOCKLED_2 [VIII]
X2D42 P8D6 PORT_CLOCKLED_2 [IX]
XCore3
X3D40 P8D4 PORT_CLOCKLED_3 [X]
X3D41 P8D5 PORT_CLOCKLED_3 [XI]
X3D42 P8D6 PORT_CLOCKLED_3 [XII]
The button LED pins are mapped to ports on the XS1-G4 as described in the table
below:
Pin Port Processor
4b 0
X0D14 P4C0 PORT_BUTTONLED [A]
X0D15 P4C1 PORT_BUTTONLED [B]
X0D20 P4C2 PORT_BUTTONLED [C]
X0D21 P4C3 PORT_BUTTONLED [D]
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XC-1A Hardware Manual (1.2) 6/18
4 Push-Button Switches [D]
The XC-1A provides four push-button switches whose states can be sampled at any
time by software. The layout of the push-buttons is shown below.
A
B
C
D
The push buttons are connected to four pins, which are mapped to ports as described
in the table below.
Pin Port Processor
4b 8b 0
X0D16 P4D0 P8B2 PORT_BUTTON [A]
X0D17 P4D1 P8B3 PORT_BUTTON [B]
X0D18 P4D2 P8B4 PORT_BUTTON [C]
X0D19 P4D3 P8B5 PORT_BUTTON [D]
The default state of a pin is high, pushing the button drives its pin low. Each pin can
be interfaced to a 4-bit port or an 8-bit port on the XS1-G4. The choice is defined by
the port interface used in the software [2].
www.xmos.com
XC-1A Hardware Manual (1.2) 7/18
5 I/O Expansion Areas [E]
The I/O pins of XCore1, XCore2 and XCore3 are brought out to expansion areas on
both sides of the card. These areas have 0.1” pitch plated through holes and are
suitable for use with IDC headers. To provide maximum flexibility, no headers are
fitted, allowing the most suitable type to be selected. The routing of the I/O and
power pins in the expansion headers is shown below.
1 2
15 16
GND
X1D11
X1D9
X1D7
GND
X1D5
X1D3
X1D1
5V
X1D10
X1D8
X1D6
3V3
X1D4
X1D2
X1D0
GND
X2D11
X2D9
X2D7
GND
X2D5
X2D3
X2D1
5V
X2D10
X2D8
X2D6
3V3
X2D4
X2D2
X2D0
X3D0
X3D2
X3D4
3V3
X3D6
X3D8
X2D10
5V
X3D1
X3D3
X3D5
GND
X3D7
X3D9
X3D11
GND
X3D12
X3D14
X3D16
3V3
X3D18
X3D20
X2D22
5V
X3D13
X3D15
X3D17
GND
X3D19
X3D21
X3D23
GND
2 1
16 15
2 1
16 15 1 2
15 16
X3PortB
X1PortA
X3PortA
X2PortA
The expansion headers provide a bank of 12 I/O pins. The pins are mapped to the
ports as shown in the table on the next page.
Eight pins from each bank can be configured as either two 4-bit ports or a single
8-bit port. Alternatively, two of the expansion headers can be used together as a
single 16-bit port.
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XC-1A Hardware Manual (1.2) 8/18
Pin Port Processor
1b 4b 8b 16b 1
XCore1
X1D0 P1A0
X1PortA
X1D1 P1B0
X1D2 P4A0 P8A0 P16A0
X1D3 P4A1 P8A1 P16A1
X1D4 P4B0 P8A2 P16A2
X1D5 P4B1 P8A3 P16A3
X1D6 P4B2 P8A4 P16A4
X1D7 P4B3 P8A5 P16A5
X1D8 P4A2 P8A6 P16A6
X1D9 P4A3 P8A7 P16A7
X1D10 P1C0
X1D11 P1D0
XCore2
X2D0 P1A0
X2PortA
X2D1 P1B0
X2D2 P4A0 P8A0 P16A0
X2D3 P4A1 P8A1 P16A1
X2D4 P4B0 P8A2 P16A2
X2D5 P4B1 P8A3 P16A3
X2D6 P4B2 P8A4 P16A4
X2D7 P4B3 P8A5 P16A5
X2D8 P4A2 P8A6 P16A6
X2D9 P4A3 P8A7 P16A7
X2D10 P1C0
X2D11 P1D0
XCore3
X3D0 P1A0
X3PortA
X3D1 P1B0
X3D2 P4A0 P8A0 P16A0
X3D3 P4A1 P8A1 P16A1
X3D4 P4B0 P8A2 P16A2
X3D5 P4B1 P8A3 P16A3
X3D6 P4B2 P8A4 P16A4
X3D7 P4B3 P8A5 P16A5
X3D8 P4A2 P8A6 P16A6
X3D9 P4A3 P8A7 P16A7
X3D10 P1C0
X3D11 P1D0
X3D12 P1E0
X3PortB
X3D13 P1F0
X3D14 P4C0 P8B0 P16A8
X3D15 P4C1 P8B1 P16A9
X3D16 P4D0 P8B2 P16A10
X3D17 P4D1 P8B3 P16A11
X3D18 P4D2 P8B4 P16A12
X3D19 P4D3 P8B5 P16A13
X3D20 P4C2 P8B6 P16A14
X3D21 P4C3 P8B7 P16A15
X3D22 P1G0
X3D23 P1H0
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XC-1A Hardware Manual (1.2) 9/18
5.1 XMOS Link Configuration
Some of the I/O pins on the expansion header can be configured as XMOS Links. The
mapping of XMOS Links to the headers is shown in the table below.
Pin Processor 1 Processor 2 Processor 3
Header A Header A Header A
2 bit 5 bit 2 bit 5 bit 2 bit 5 bit
XnD1 XLA4 I XLA4 O XLA4 I
XnD2 XLA3 I XLA3 O XLA3 I
XnD3 XLA2 I XLA2 O XLA2 I
XnD4 XLA1 I XLA1 I XLA1 I XLA1 O XLA1 I XLA1 I
XnD5 XLA0 I XLA0 I XLA0 I XLA0 O XLA0 I XLA0 I
XnD6 XLA0 O XLA0 O XLA0 O XLA0 I XLA0 O XLA0 O
XnD7 XLA1 O XLA1 O XLA1 O XLA1 I XLA1 O XLA1 O
XnD8 XLA2 O XLA2 I XLA2 O
XnD9 XLA3 O XLA3 I XLA3 O
XnD10 XLA4 O XLA4 I XLA4 O
Header B
XnD13 XLB4 I
XnD14 XLB3 I
XnD15 XLB2 I
XnD16 XLB1 I XLB1 I
XnD17 XLB0 I XLB0 I
XnD18 XLB0 O XLB0 O
XnD19 XLB1 O XLB1 O
XnD20 XLB2 O
XnD21 XLB3 O
XnD22 XLB4 O
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XC-1A Hardware Manual (1.2) 10/18
6 Prototyping Area [F]
The XC-1A provides a 0.1” pitch plated through hole area for adding components to
the card.
The routing of I/O and power pins in the prototyping area is shown below.
3V3
X0D39
GND
GND
X0D38
X0D37
X0D36
X0D33
X0D32
X0D31
X0D30
X0D29
X0D28
X0D27
X0D26
X0D11
X0D10
X0D1
X0D0
5V
The prototyping area provides a bank of 16 I/O pins, which are mapped to the ports
on processor 0 as described in the table below.
Pin Port Processor
1b 4b 8b 0
X0D26 P4E0 P8C0
Prototyping
Area
X0D27 P4E1 P8C1
X0D28 P4F0 P8C2
X0D29 P4F1 P8C3
X0D30 P4F2 P8C4
X0D31 P4F3 P8C5
X0D32 P4E2 P8C6
X0D33 P4E3 P8C7
X0D36 P1M0
X0D37 P1N0
X0D38 P1O0
X0D39 P1P0
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