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501 E. Whitcomb Ave.
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Phone: (248) 397-8856
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G400S and G400D SoM Datasheet
G400S SoM
G400D SoM
Where Hardware Meets Software
GHI Electronics, LLC
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Introduction
G400S and G400D SoM Datasheet
Contents
Introduction ..........................................................................................................................................................4
2.1
G400S vs G400D ...........................................................................................................................................4
2.2
Key Features .................................................................................................................................................5
2.3
Example Applications ...................................................................................................................................5
The .NET Micro Framework ..................................................................................................................................6
3.1
GHI Electronics and NETMF..........................................................................................................................6
Pinout Tables ........................................................................................................................................................7
4.1
G400S Pinout ................................................................................................................................................7
4.2
G400D Pinout ...............................................................................................................................................8
Reference Design ..................................................................................................................................................9
Device Startup .....................................................................................................................................................10
Libraries ..............................................................................................................................................................11
7.1
General Purpose Input and Output (GPIO) ................................................................................................11
7.2
Analog Input ...............................................................................................................................................11
7.3
Pulse Width Modulation (PWM) ................................................................................................................11
7.4
Signal Generator ........................................................................................................................................11
7.5
Signal Capture ............................................................................................................................................11
7.6
Pulse Feedback ...........................................................................................................................................11
7.7
Universal Asynchronous Receiver Transmitter (UART) ..............................................................................12
7.8
Serial Peripheral Interface (SPI) .................................................................................................................12
7.9
Inter-Integrated Circuit (I2C) ......................................................................................................................12
7.10
Controller Area Network (CAN) ..................................................................................................................12
7.11
1-Wire ........................................................................................................................................................12
7.12
Graphics .....................................................................................................................................................12
7.13
Touch Screen ..............................................................................................................................................13
7.14
USB Host .....................................................................................................................................................13
7.15
USB Client ...................................................................................................................................................13
7.16
File System .................................................................................................................................................13
7.17
Networking .................................................................................................................................................13
7.17.1
Ethernet .............................................................................................................................................13
7.17.2
Wi-Fi ..................................................................................................................................................13
7.17.3
Point to Point.....................................................................................................................................13
7.18
Extended Weak References .......................................................................................................................14
7.19
Configuration .............................................................................................................................................14
7.20
Real Time Clock ..........................................................................................................................................14
7.21
Watchdog ...................................................................................................................................................14
7.22
Power Control ............................................................................................................................................14
7.23
In-Field Update ...........................................................................................................................................14
7.24
SQLite Database .........................................................................................................................................14
7.25
Direct Memory Access ...............................................................................................................................14
7.26
Battery RAM ...............................................................................................................................................15
7.27
Runtime Loadable Procedures ...................................................................................................................15
Design Considerations ........................................................................................................................................16
8.1
Required Pins .............................................................................................................................................16
8.2
Power Supply .............................................................................................................................................16
8.3
Crystals .......................................................................................................................................................16
8.4
SPI Channels ...............................................................................................................................................16
8.5
Ethernet .....................................................................................................................................................16
8.6
Direct Memory Access ...............................................................................................................................16
Footprints............................................................................................................................................................17
9.1
G400S Recommended Footprint ................................................................................................................17
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Introduction
G400S and G400D SoM Datasheet
9.2
G400D Recommended Footprint ...............................................................................................................17
10 Soldering the G400S............................................................................................................................................18
10.1
Oven Reflow ...............................................................................................................................................18
11 Legal Notice ........................................................................................................................................................19
11.1
Licensing .....................................................................................................................................................19
11.2
Trademarks ................................................................................................................................................19
11.3
Disclaimer ...................................................................................................................................................19
12 Revision History ..................................................................................................................................................20
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Introduction
G400S and G400D SoM Datasheet
Introduction
The G400 SoMs are powerful, low-cost, surface-mount System on Modules (SoM) running Microsoft's .NET Micro
Framework. The .NET Micro Framework enables the SoM to be programmed from Microsoft Visual Studio using a
USB or serial cable. Programming in a modern managed language, such as C# or Visual Basic, allows developers to
accomplish more work in less time by taking advantage of the extensive built-in libraries for networking, file
systems, graphical interfaces, and more.
A simple two-layer circuit board with a power source and a few connectors can utilize the G400 SoMs to bring the
latest technologies to any product. There are no additional licensing or other fees and all the development tools
are provided freely.
Throughout this document, the G400S SoM and the G400D SoM will be referred to as the G400S and G400D,
respectively. When only G400 is listed, the information applies to both the G400S and the G400D unless specified
otherwise.
For more information and support, please see https://www.ghielectronics.com/support/netmf and the product
catalog entry. For advanced electrical characteristics and details on the underlying SAM9X35 processor, please
consult the processor’s datasheet.
2.1
G400S vs G400D
The G400 comes in a standard and an extended format. They are not pinout compatible. The below table lists the
differences.
G400S
G400D
Package
120 pin surface-mount module (SMT)
200 pin SODIMM module
Dimensions
48.3 x 33.1 x 4.6 mm
67.6 x 31.8 x 4.1 mm
GPIO
89
102
Analog Input
12
Ethernet
ENC28J60 over SPI
8
ENC28J60 over SPI and/or
Built in base 100 Ethernet PHY
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2.2
Introduction
G400S and G400D SoM Datasheet
Key Features
2.3
.NET Micro Framework
RoHS Lead Free
400 MHz ARM 9 Atmel SAM9X35
64 Mbytes available RAM
1.4 Mbytes available flash
Embedded LCD controller
89 to 102 interrupt capable GPIO
2 SPI
1 I2C
6 UART
2 CAN
4 PWM
8 to 12 10-bit analog input
4-bit SD/MMC memory card interface
Low power modes
-40°C to +85°C operational
RTC
Watchdog
Threading
USB host
USB client
SQLite database
TCP/IP with SSL
o Full .NET socket interface
o Ethernet
o Wi-Fi
o PPP
Graphics
o Images
o Fonts
o Controls
File System
o Full .NET file interface
o SD cards
o USB drives
Native extensions
o Runtime Loadable Procedures
o Device register access
Signal controls
o Generation
o Capture
o Pulse measurement
Example Applications
Vending machines
POS Terminals
Measurement tools and testers
Networked sensors
Robotics
Central alarm system
Smart appliances
Industrial automation devices
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The .NET Micro Framework
G400S and G400D SoM Datasheet
The .NET Micro Framework
Inspired by the full .NET Framework, Microsoft developed a lightweight version called .NET Micro Framework
(NETMF). NETMF focuses on the specific requirements of resource-constrained embedded systems. Development,
debugging, and deployment are all conveniently performed using Microsoft's powerful Visual Studio through a
standard USB or serial cable.
Programming is done in C# or Visual Basic with libraries that cover sockets, memory management with garbage
collection, advanced file system support, multitasking services, and many others. In addition to supporting many
standard .NET features, NETMF has additional embedded extensions supporting microcontroller specific needs
such as PWM outputs and analog inputs.
3.1
GHI Electronics and NETMF
Since signing the partnership agreement with Microsoft in 2008, GHI Electronics has become the leading Microsoft
partner on NETMF through its work on integrating and extending the NETMF core. GHI Electronics's NETMF
products are extended with important features extending the NETMF libraries such as databases, USB Host, Wi-Fi,
and native programming.
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Pinout Tables
G400S and G400D SoM Datasheet
Pinout Tables
Many signals on the G400 are multiplexed to offer multiple functions on a single pin. Developers can decide on the
pin functionality to be used through the provided libraries. Any pin with no name, function, or note must be left
unconnected.
4.1
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
G400S Pinout
Name
PD0
PD4
PA27
PA16
PA8
PA3
PA2
PC28
PC23
PC5
PC1
Function
SD CMD
COM4 RX
COM2 CTS
COM2 RTS
LCD HS
LCD G0
LCD B1
1.8 V
GND
PB3
PB1
PB18
PB8
PB14
PB12
PB6
PB15
PB0
PB5
PC2
PC9
PC11
PC12
PC24
PA0
PC21
PC19
PC22
PA7
PA4
PB11
PB13
ADC9
ADC3
ADC1
TOUCH YU
ADC7
ADC4
LCD B2
LCD G4
COM5 RX
LCD R0
LCD R1
COM2 TX
PWM3
PWM1
COM4 TX
LDR1
ADC0
ADC2
TOUCH XL
Pin
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
Name
PB10
Function
ADC11
3.3 V
VBAT
ADC8
PB7
PB2
PC0
PC6
LCD B0
LCD G1
1.8 V
LCD G5
LCD B3
LCD R4
PWM0
1.0 V
LCD R2
PC10
PC3
PC15
PC18
PC13
PC31
GND
PC26
PC30
PB16
PB17
PB9
PB4
PC4
PC7
PC8
PC14
PC16
PC20
PC17
PC27
PC29
PA5
PA1
PA10
PA9
PA15
PA18
PA20
LCD CLK
SPI1 MOSI
ADC5
ADC6
ADC10
LCD B4
LCD G2
LCD G3
COM5 TX
LCD R3
COM6 TX
PWM2
COM6 RX
LCD VS
LCD OE
COM3 TX
CAN2 TD
COM2 RX
SPI1 MISO
COM1 TX
CAN1 TD
COM1 RX CAN1 RD
SD D0
SD D1
SD D3
Pin
81
82
831
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
1101
111
112
113
114
115
116
117
118
119
120
Name
PA23
PA28
PA31
Function
SPI2 SCK
I2C SCL
3.3 V
USBC D+
USBC DUSBH0 D+
USBH0 DUSBH1 D+
USBH1 DRESET
PA19
PA21
PA24
PA25
GND
SPI1 SCK
SD D2
SPI2 MISO
LDR0
MODE
1.0 V
PA6
PA17
PA22
PA26
PA30
PA29
COM3 RX CAN2 RD
SD CLK
SPI2 MOSI
PD2
PD1
PD7
PD3
PD5
PD6
TOUCH XR
TOUCH YD
I2C SDA
GND
1
Open drain requiring a 2.2 kΩ pull-up resistor
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4.2
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Name
Pinout Tables
G400S and G400D SoM Datasheet
G400D Pinout
Function
GND
ETH PHY TXETH PHY TX+
GND
ETH PHY RXETH PHY RX+
ETH PHY SPEED
ETH PHY LINK
GND
3.3 V
GND
3.3 V
GND
GND
3.3 V
Pin
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
Name
Function
GND
PD18
PD17
PD16
3.3 V
PD15
PD14
PD13
PD12
GND
PD11
PD10
PD9
PD8
3.3 V
GND
3.3 V
PB8
PD2
PC23
PD0
ADC9
TOUCH XR
GND
PB18
PB11
PA5
PA6
PC22
ADC0
COM3 TX CAN2 TD
COM3 RX CAN2 RD
Pin
101
102
103
104
105
106
107
108
109
110
111
112
113
114
1151
1161
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
Name
PC31
PA0
PA1
PB12
PC18
PB17
PA4
PC19
PB16
PA30
PA31
PA9
PA10
PC24
PA2
PA3
PD7
PA15
PA16
PA17
PA18
PA19
PA20
PC21
PC26
PC20
PA24
PA25
PA26
PA27
PA28
PA29
PC16
PC17
PC27
PC28
PC30
PC29
PD3
PD4
PD5
PD6
Function
COM2 TX
COM2 RX
ADC1
TOUCH YU
PWM0
3.3 V
SPI1 MISO
SPI1 MOSI
SPI1 SCK
ADC6
LDR1
PWM1
GND
ADC5
I2C SDA
I2C SCL
COM1 RX
CAN1 RD
COM1 TX
CAN1 TD
COM2 RTS
COM2 CTS
SD D0
3.3 V
SD CMD
SD CLK
SD D1
SD D2
SD D3
PWM3
GND
PWM2
LDR0
MODE
COM6 TX
COM6 RX
3.3 V
LCD VS
LCD HS
LCD CLK
LCD OE
Pin
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
Name
PC10
PC11
PC12
PC13
PC14
PA23
PA21
Function
GND
LCD B0
LCD B1
LCD B2
LCD B3
LCD B4
ADC2
TOUCH XL
ADC3
ADC4
3.3 V
LCD G0
LCD G1
LCD G2
LCD G3
COM5 TX
LCD G4
COM5 RX
TOUCH YD
COM4 RX
LCD R4
GND
LCD G5
LCD R0
LCD R1
LCD R2
LCD R3
SPI2 CLK
SPI2 MISO
PA22
SPI2 MOSI
PC0
PC1
PC2
PC3
PC4
PB13
PB14
PB15
PC5
PC6
PC7
PC8
PC9
PD1
PA8
PC15
3.3 V
USBH1 D+
VBAT
USBH1 DGND
GND
RESET
USBH0 D+
USBH0 D3.3 V
USBC D+
USBC DGND
PA7
1
Open drain requiring a 2.2 kΩ pull-up resistor
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Reference Design
G400S and G400D SoM Datasheet
Reference Design
The G400D Dev Board is an excellent starting point and reference design for anyone interested in evaluating and
developing with the G400. See the product catalog entry for more information and additional resources.
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Device Startup
G400S and G400D SoM Datasheet
Device Startup
The G400 is held in reset when the reset pin is low. Releasing it will begin the system startup process. It is pulled
high internally.
There are four different components of the device firmware:
1.
2.
3.
4.
GHI Bootloader: initializes the system, updates TinyBooter when needed, and executes TinyBooter.
TinyBooter: executes TinyCLR, updates TinyCLR when needed, and updates the system configuration.
TinyCLR: loads, debugs, and executes the managed application.
Managed application: the program developed by the customer.
Which components get executed on startup can be control by manipulating the LDR0 and LDR1 pins. LDR0 and
LDR1 are pulled high on startup.
LDR0
LDR1
Effect
Ignored
High
Execute the managed application.
High
Low
Wait in TinyBooter
Low
Low
Wait in GHI Bootloader
Additionally, the communications interface between the host PC and the G400 is selected on startup through the
MODE pin, which is pulled high on startup. The USB interface is selected when MODE is high and COM1 is selected
when MODE is low.
The above discussed functions of LDR0, LDR1, and MODE are only during startup. After startup, they return to the
default GPIO state and are available to use as GPIO in the user application.
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Libraries
G400S and G400D SoM Datasheet
Libraries
Similar to the full .NET Framework, NETMF includes many built in libraries to help in modern application
development with additional libraries to support embedded systems.
Please see https://www.ghielectronics.com/support/netmf for more information.
7.1
General Purpose Input and Output (GPIO)
GPIOs can read and write logical high and low signals. Keep the following in mind:
7.2
They default to inputs with internal weak pull-up resistors
They operate on 3.3 V logic levels.
They are not 5 V tolerant.
They have controllable pull up and pull down resistors.
All pins are interrupt capable.
See the processor’s documentation for information on sourcing and sinking current.
Analog Input
Analog inputs can read voltages from 0 V to 3.3 V with 10-bit resolution. The built in analog circuitry uses the
source voltage as a reference which can cause some noise on the analog signal. High accuracy ADCs with a
dedicated reference can be added externally.
7.3
Pulse Width Modulation (PWM)
PWM is used to create a waveform with a specified frequency and duty cycle. It uses built-in hardware so no
processing resources are needed to keep it running. Frequencies can range from 2 Hz to 24 MHz.
7.4
Signal Generator
Signal Generator is used to generate a waveform on any GPIO with varying frequency and duty cycle. The feature is
software driven and can generate frequencies up to 200 kHz ±10%. More processing time is required for higher
frequencies.
7.5
Signal Capture
Signal Capture monitors any GPIO pin and records the time from the last change. This feature is software driven
and can measure frequencies up to 400 kHz ±10%. Lower frequencies have higher accuracy.
7.6
Pulse Feedback
Pulse Feedback is used for sensing capacitance on any GPIO input and measuring pulses from ultrasonic distance
and other sensors. When used for sensing capacitance, a 100 pF capacitor and 1 MΩ resistor between the pad and
ground are recommended.
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7.7
Libraries
G400S and G400D SoM Datasheet
Universal Asynchronous Receiver Transmitter (UART)
UART is a common, full duplex, communications interface. Baud rates from 2,400 to 1,500,000 are supported.
Handshaking is supported on COM2 only. Data bits between 5 and 8 are supported. Stop bits of 1, 1.5, and 2 are
supported. Space, mark, even, and odd parities are supported.
7.8
Serial Peripheral Interface (SPI)
SPI is a common three or four wire serial interface. The G400 can act as a SPI bus master only. The maximum
supported clock is 66.6 MHz and all four SPI modes are supported. The SPI bus is designed to interface with
multiple SPI slave devices. The active slave is selected by asserting the chip select line on the slave device.
SPI1 is shared internally with the flash memory on the G400. Use of a chip select with devices on this channel is
required or the G400 will not function properly. The use of another SPI channel is recommended.
7.9
Inter-Integrated Circuit (I2C)
I2C is a two-wire addressable serial interface. The G400 can act as an I2C bus master only with 7-bit slave
addresses. It can connect to one or more slave devices over the same connection with a maximum clock of 400
kHz. The I2C bus interface requires pull up resistors to be added on both the SCL and SDA pins, usually 2.2 kΩ.
It is possible to simulate an independent I2C bus on any two GPIO pins with the appropriate resistors though the
software I2C class, but performance will be lower.
7.10 Controller Area Network (CAN)
CAN is a common interface in industrial control and the automotive industry. CAN on the G400 is compliant with
the CAN 2.0B specifications. Bitrates up to 1 Mbit/s are supported. For systems with higher traffic, different
message filter options are available.
7.11 1-Wire
Through 1-Wire, a master can communicate with multiple 1-Wire slaves using any GPIO.
7.12 Graphics
The G400 supports 16-bit color TFT displays up to 800x600. Displays require the horizontal sync, vertical sync,
clock, enable, and the 16 color lines. The color format is 565 (5 bits for red, 6 bits for green, and 5 bits for blue). If
the display has more than 16 color lines, connect the most significant color lines to the G400 and the remaining
lines to ground.
While SPI displays can be utilized as well, the native TFT interface is recommended as it allows for a faster update
rate.
NETMF includes support for drawing though the bitmap object. TrueType font files can be used once converted to
the TinyFont format used by NETMF.
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Libraries
G400S and G400D SoM Datasheet
7.13 Touch Screen
The G400 supports displays with four-wire restive touch without the need for any additional hardware, though
using an external controller is possible. The default touch pins can be remapped if required. Capacitive touch
displays can be used through the I2C interface.
7.14 USB Host
USB host allows the use of USB mass storage devices, joysticks, keyboards, and mice. Additionally, for USB devices
that do not have a standard class included, low level USB access is provided for bulk transfers. USB hubs are
supported allowing multiple devices to be connected.
7.15 USB Client
The USB client interface is typically used as the G400 debug interface and for application deployment through
Visual Studio. However, it is controllable and may be used to simulate other USB devices such as mice, keyboards,
and Communications Device Class (CDC) interfaces using low level access instead of the debug interface.
7.16 File System
The G400 supports accessing files on SD cards and USB memory devices formatted as FAT16 or FAT32. SD cards
use a true 4-bit interface. SD/SDHC/SDXC cards in full, mini, and micro formats and any USB device with mass
storage class are supported. Access speeds are dependent on many different factors and can be up to 500 Kbyte/s.
7.17 Networking
The G400 supports Ethernet, Wi-Fi, and PPP through the built in LwIP stack. The full stack includes TCP, UDP,
DHCP, DNS, HTTP, FTP, and others. Secure connections can be created using the built in SSL stack.
7.17.1 Ethernet
Ethernet support is available using the built-in NETMF TCP/IP and SSL stack through the on-board base-100
Ethernet PHY on the G400D and through an external ENC28J60 SPI Ethernet chip on both the G400S and the
G400D.
7.17.2 Wi-Fi
Any Wi-Fi module with a built-in TCP/IP stack can be used with the G400. However, these modules are typically
limited. Through the supported Redpine RS9110-N-11-22-04 and RS9110-N-11-22-05 chips, Wi-Fi is usable with the
built-in NETMF TCP/IP and SSL stacks.
7.17.3 Point to Point
The Point to Point (PPP) protocol is often used for devices needing to connect to mobile networks. While typical
embedded devices use the mobile modem's built-in and very limited TCP/IP stack, systems using the G400 can use
these modems with the internal NETMF TCP/IP and SSL stack.
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Libraries
G400S and G400D SoM Datasheet
7.18 Extended Weak References
Extended Weak References are a way for managed applications to store data in non-volatile memory. This is meant
to be used as a configuration store that does not change frequently where the data can be recreated if needed.
There are 128 KBytes available for use.
7.19 Configuration
Access to the configuration sector of the device is provided for storage of small, infrequently changing, entries. The
data will be lost if the configuration is reflashed. Space is limited and varies based on other information stored in
the configuration.
7.20 Real Time Clock
The real time clock (RTC) is used to keep time while the processor is off, drawing its power from a backup battery
or super capacitor providing 1.65 V to 3.6 V. The required circuitry and crystal are included.
7.21 Watchdog
Watchdog is used to reset the system if it enters an erroneous state. The G400 supports timeouts between 1 ms
and 15,995 ms. Watchdog support is included through the GHI Electronics libraries replacing the built in NETMF
version.
7.22 Power Control
The G400 supports entering sleep, deep sleep, and off modes in order to reduce power usage. It can consume as
little as 56 mA in sleep, 27 mA in deep sleep, and 20 mA in off. It may be woken from an RTC alarm or a GPIO
interrupt. Sleep pauses execution of the program. Deep sleep pauses execution of the program and shuts down
many internal functions. Off shuts down all internal functions and can only be woken by the RTC alarm or a system
reset. The system will be automatically reset when exiting off mode.
7.23 In-Field Update
Through In-Field Update, the G400 can update its firmware and managed application. The update can come from
the network, a bus, or connected media.
7.24 SQLite Database
SQLite can be used to created databases that can be stored in memory or on a supported storage device such as a
USB drive or SD card.
7.25 Direct Memory Access
Low level device registers and memory can be accessed to further configure the G400’s underlying processor. Not
all functionality of the processor is available as some functions may be used or configured internally for use in
NETMF.
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Libraries
G400S and G400D SoM Datasheet
7.26 Battery RAM
Battery-backed RAM is provided as part of the internal RTC. This memory retains its contents when the power is
lost as long as there is a backup battery. There are 16 bytes of battery backed RAM available. Consult the
processor's documentation for details on use.
7.27 Runtime Loadable Procedure s
Similar to code loaded from a DLL, Runtime Loadable Procedures (RLP) allows a binary or ELF image to be loaded
into memory and executed on the device. This is useful for advanced and critical performance scenarios. The RLP
region starts at address 0xA0000000 and is 0x16FFFFC bytes in size. Your compiled images must fall completely
within that range.
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8
Design Considerations
G400S and G400D SoM Datasheet
Design Considerations
8.1
Required Pins
Exposing the following pins is required in every design to enable device programming, updates, and recovery:
8.2
LDR0
LDR1
Desired debug interface(s)
MODE if required to select a debug interface
SPI1 MISO to update TinyBooter in SDK 2015 R1 and earlier and to install the GHI Bootloader once for SDK
2016 R1 and later
Power Supply
A typical clean power source, suited for digital circuitry, is needed to power the G400. Voltages should be within at
least 10% of the needed voltage. Decoupling capacitors of 0.1 μF are needed near every power pin. Additionally, a
large capacitor, typically 47 μF, should be near the G400 if the power supply is more than few inches away.
Additionally, the G400 requires additional voltages beyond the typical 3.3 V to function properly. See the pinout
table for details.
8.3
Crystals
The G400 includes the needed system and RTC crystals and their associated circuitry.
8.4
SPI Channels
SPI1 is shared internally with the flash memory on the G400. Use of a chip select with devices on this channel is
required or the G400 will not function properly. The use of another SPI channel is recommended.
8.5
Ethernet
The built in Ethernet available on the G400D includes all needed Ethernet circuitry internally. However, an
appropriate magnet and connector, like the J0011D or similar, are required.
8.6
Direct Memory Access
Most of the core processor’s resources are used by NETMF. Some resources are permanently used, like the main
system timer while others are used when specific features, like the timers for PWM, are enabled. Used resources
can change from one firmware version to another so care must be taken when using these resources through RLP
or other direct memory access methods.
When absolutely required, applications can use resources in conjunction with NETMF. For example, creating a
special baud rate, utilizing the timer capture feature, and making use of many other features supported by the
processor. Please contact GHI Electronics’s consulting services to determine exactly what resources are available
and if the G400 can fulfill the specific requirements.
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9
Footprints
G400S and G400D SoM Datasheet
Footprints
We recommend no traces or vias under the module. Dimensions are in inches.
9.1
G400S Recommended Footprint
9.2
G400D Recommended Footprint
The G400D uses a standard SODIMM 200 form factor. We recommend the use of TE Connectivity AMP
Connectors’s connector with part number 1565917-4.
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Soldering the G400S
G400S and G400D SoM Datasheet
10 Soldering the G400S
The G400S is designed to be easily machine-placed or hand-soldered. Static sensitive precautions should be taken
when handling the module.
10.1 Oven Reflow
The G400S is not sealed for moisture. Baking the module before reflow is recommended and required in a humid
environment. The process of reflow can damage the G400 if the temperature is too high or exposure is too long.
The lead-free reflow profile used by GHI Electronics is shown below. The profiles shown are based on SAC 305
solder (3% silver, 0.5% copper). The thermal mass of the assembled board and the sensitivity of the components
on it affect the total dwell time. Differences in the two profiles are where they reach their respective peak
temperatures as well as the time above liquids (TAL). The shorter profile applies to smaller assemblies, whereas
the longer profile applies to larger assemblies such as back-planes or high-density boards. The process window is
described by the shaded area. These profiles are only starting-points and general guidance. The particulars of an
oven and the assembly will determine the final process.
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Legal Notice
G400S and G400D SoM Datasheet
11 Legal Notice
11.1 Licensing
The G400S SoM and G400D SoM, with all their built-in software components, are licensed for commercial and noncommercial use. No additional fee or licensing is required. Software, firmware, and libraries provided for the
G400S SoM and the G400D SoM are licensed to be used on the G400S SoM and the G400D SoM only.
11.2 Trademarks
G400S and G400D are trademarks of GHI Electronics, LLC.
.NET Micro Framework and Visual Studio are registered or unregistered trademarks of Microsoft Corporation.
Other registered or unregistered trademarks are owned by their respective companies.
11.3 Disclaimer
IN NO EVENT SHALL GHI ELECTRONICS, LLC BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS PRODUCT, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE. GHI ELECTRONICS, LLC LINE OF PRODUCTS ARE NOT DESIGNED FOR LIFE SUPPORT APPLICATIONS.
SPECIFICATIONS AND AVAILABILITY ARE SUBJECT TO CHANGE WITHOUT ANY NOTICE.
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Revision History
G400S and G400D SoM Datasheet
12 Revision History
Revision
Date
Change
1.1
2017-01-17
Clarified TinyBooter update pin
1.0
2015-11-12
Initial release.
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