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CCIMX6UL
User Manual
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Digi CCIMX6UL User Manual

ConnectCore® 6UL
System-on-module solution
Hardware Reference Manual
Revision history—90001523
Revision Date Description
1P May
2016
2P May
2016
3P June
2016
4P August
2016
A March
2017
Preliminary document
Revise bootstrap-GPIO configuration table; add new power supply architecture graphics; revise MCA pinout table
Revise pinout table, add new and revise graphics, update official weight, list Bluetooth 4.2, incorporate miscellaneous editorial corrections, remove "preliminary" designation
Add power consumption, MCA, wireless interfaces, socket, assembly and product soldering, cryptoauthentication, bootstrap, and electrical characteristics sections; modify pinout tables; miscellaneous editorial revisions.
Trademarks and copyright
Digi, Digi International, and the Digi logo are trademarks or registered trademarks in the United States and other countries worldwide. All other trademarks mentioned in this document are the property of their respective owners.
© 2016 Digi International Inc. All rights reserved.
Disclaimers
Information in this document is subject to change without notice and does not represent a commitment on the part of Digi International. Digi provides this document “as is,” without warranty of any kind, expressed or implied, including, but not limited to, the implied warranties of fitness or merchantability for a particular purpose. Digi may make improvements and/or changes in this manual or in the product(s) and/or the program(s) described in this manual at any time.
Warranty
To view product warranty information, go to the following website:
www.digi.com/howtobuy/terms
Send comments
Documentation feedback: To provide feedback on this document, send your comments to
techcomm@digi.com.
ConnectCore® 6UL Hardware Reference Manual
2
Customer support
Digi Technical Support: Digi offers multiple technical support plans and service packages to help our
customers get the most out of their Digi product. For information on Technical Support plans and pricing, contact us at +1 952.912.3444 or visit us at www.digi.com/support.
Support portal login: www.digi.com/support/eservice
ConnectCore® 6UL Hardware Reference Manual
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Contents
About the ConnectCore® 6UL
Features and functionality 6 ConnectCore 6UL module variants 8 Block diagrams 8
ConnectCore 6UL module 9 NXP i.MX6UL application processor 10
Power supply 11
Power supply architecture 11
System power-up sequence 14 Bootstrap 15 Boot from fuses 15 Internal boot 16 Serial downloader 17 Wireless interfaces 17
WLAN 802.11a/b/g/n/ac 17
Antenna ports 23
Bluetooth 23
RF control signals 23 Micro Controller Assist™ 23
ConnectCore 6UL module lines related to the MCA 24
Reset control 25
IOs 26
Watchdog 28
Real-time clock 29
Tamper support 29
Power management 30
MCA firmware update 33 CryptoAuthentication device 33 Module pinout - general layout 33
External signals and pin multiplexing 35
Module specifications
Electrical specifications 116
With front-end LDO 116
Without front-end LDO 116 Power consumption 116
Power consumption use cases 117
Global power consumption 119
Power consumption: Wireless power consumption increase 120
Power consumption: Real wireless transmission 121
Power consumption: Wireless-UART bridge 122 Mechanical specifications 122
Dimensions 122
ConnectCore® 6UL Hardware Reference Manual
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Host PCB footprint 124
Weight 125 Environmental specifications 125 Socket options 125
Assembly instructions
Moisture sensitivity and shelf life 128 Mounting 128 Solder paste print 128 Stencil 128 Coplanarity 128 SMT pick and place 129 SMT process parameter reference - for both castellation and LGA applications 129 Reflow profiles using a ten-zone oven, SAC 305 lead-free solder paste (Alpha OM-340) 129 Vapor Phase Profile Recommendation Using IBL 309 Batch Soldering Machine, SAC 305 Lead­Free Solder Paste (Alpha OM-340) 130 Vapor Phase IBL 309 batch soldering machine settings 132 Conformal coating 132
Certifications
External antenna 134 United States FCC 134
FCC notices 134
FCC-approved antennas 135
RF exposure 135 Europe 136
OEM labeling requirements 136
CE labeling requirements 136
Declarations of Conformity 136
Approved antennas 136 Canada (IC) 136
Labeling requirements 137
Transmitters with detachable antennas 137
RF exposure 137
Approved antennas 138 Japan 138
Approval Label (MIC Marking) 139
ConnectCore® 6UL Hardware Reference Manual
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About the ConnectCore® 6UL

The ConnectCore 6UL module delivers a secure and extremely cost-effective connected System-on­Module platform that is slightly bigger than a postage stamp. Its innovative Digi SMTplus™ (patent­pending) surface mount form factor allows you to choose simplified design integration leveraging proven and easy-to-use edge-castellated SMT technology, or a versatile LGA option for ultimate design flexibility with access to virtually all interfaces.
Built on the NXP i.MX6UL application processor, the module is the intelligent communication engine for today’s secure connected devices. It seamlessly integrates dual-Ethernet and pre-certified dual­band Wi-Fi (802.11a/b/g/n/ac) with Bluetooth 4.2 dual mode connectivity.

Features and functionality

The ConnectCore 6UL system-on-module is based on the i.MX6UL processor from NXP. This processor offers a number of interfaces, most of them multiplexed and not available simultaneously. The module has the following features:
l i.MX6UL single ARMCortex-A7 core operating at speeds up to 528 MHz:
o
32 Kb L1 instruction cache
o
32 Kb L1 data cache
o
Up to 128 KB unified instruction/data L2 cache
o
NEONMPE (media processing engine) co-processor
l Up to 1 GB, 16-bit DDR3-800 memory
l Up to 2 GB, 8-bit SLC NAND flash memory
l NXP PF3000 power management IC (PMIC):
o
x 4 DC/DC buck converters
o
x 6 LDO regulators
o
x 1 DC/DC boost converter
o
OTP (one-time programmable) memory
o
Coin cell charger and always-ON RTC supply
l Graphical hardware accelerators:
o
PXP (PiXel Processing Pipeline)
o
ASRC (asynchronous sample rate converter)
l Secure Element
l Security accelerators:
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About the ConnectCore® 6UL Features and functionality
o
ARMTrustZone
o
CAAM (cryptographic acceleration and assurance module)
o
SNVS (secure non-volatile storage)
o
CSU (central security unit)
o
A-HABv4 (advanced high-assurance boot)
l IEEE 802.11 a/b/g/n/ac WLAN interface
l Bluetoothversion 4.2 dual-mode
l ARM Cortex-M0+ Micro Controller Assist™ (MCA) subsystem
l Debug interfaces:
o
System JTAG controller
o
Single Wired Debug (SWD) interface for the MCA
l Support of i.MX6UL interfaces:
o
16-bit data/address bus
o
Display: 24-bit parallel bus
o
Camera: 24-bit parallel bus
o
KPP (key pad port)
o
TSC (touch screen controller)
o
x 2 MMC/SD/SDIO card ports
o
x 2 USB 2.0 OTG with integrated HS USB PHYs
o
x 2 10/100 Mbps Ethernet MAC
o
UART, SPI, I2C, PWM, ADC, CAN, I2S, and GPIOs
l Ultra-miniature SMT module (29 x 29 x 3.5 mm) based on 245 pads (245 LGA, 76 also available as
castellated pads)
ConnectCore® 6UL Hardware Reference Manual
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About the ConnectCore® 6UL ConnectCore 6UL module variants

ConnectCore 6UL module variants

Smart part number
CC­WMX­JN58­NE
CC-MX­JN58-Z1
1
CPU temperature is Tj (junction)
2
DDR3 temperature is Ta (ambient)
Part number
50001939-010x02 ConnectCore for
50001939-020x03 ConnectCore for
ConnectCore
6UL SOM
variant Description
i.MX6UL-2, 528 MHz, Industrial Temp, 256 MB SLC NAND, 256 MB DDR3, Dual 10/100 Ethernet,
802.11a/b/g/n/ac, Bluetooth 4.1, ANT+
i.MX6UL-2, 528 MHz, Industrial Temp, 256 MB SLC NAND, 256 MB DDR3, Dual 10/100 Ethernet
1
CPU
G2CVK05 ­40/+105°C
528 MHz
G2CVK05 ­40/+105°C
528 MHz
DDR3/Bus
2
-width
256MiB (1x2Gbit) / 16bit, ­40/+95ºC
256MiB (1x2Gbit) / 16bit, ­40/+95ºC
WiFi/Bluetooth
Block diagrams
The figures below show block diagrams of the ConnectCore 6UL module and of the NXP i.MX6UL application processor.
ConnectCore® 6UL Hardware Reference Manual
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About the ConnectCore® 6UL Block diagrams

ConnectCore 6UL module

ConnectCore® 6UL Hardware Reference Manual
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About the ConnectCore® 6UL Block diagrams

NXP i.MX6UL application processor

ConnectCore® 6UL Hardware Reference Manual
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About the ConnectCore® 6UL Power supply

Power supply

Power supply architecture

The ConnectCore 6UL requires a primary power supply input. This supply is the main power domain to the on-module NXP PF3000 power management IC (PMIC), which generates all required supply voltages for the module as well as the external interfaces. The system can be powered from voltages up to 5.5V. See Powering the system from a nominal 5V power supply (4.5V to 5.5V) and Powering the
system for battery-powered applications (3.7V - 4.5V) for recommended power schemes for the
ConnectCore 6UL module.
The ConnectCore 6UL module has a dedicated pin for connecting a coin cell backup battery or super capacitor. You can enable a coin cell charger on the PMIC with Li-ion rechargeable batteries. This backup battery or super capacitor is mandatory if RTC time must persist after the module has been disconnected from main power. You must also follow the recommended diode configuration as shown in the diagrams below to make sure the module holds the system time.
If RTC time retention is not required, you can remove the circuitry from your design and connect the
3.3V voltage regulator directly to the VCC_MCA and MCA_VIN_DET pins.
Powering the system from a nominal 5V power supply (4.5V to 5.5V)
ConnectCore® 6UL Hardware Reference Manual
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About the ConnectCore® 6UL Power supply
Powering the system for battery-powered applications (3.7V - 4.5V)
Note In the implementations shown above, the coin cell/supercapacitor is connected to VCC_LICELL
pin of the ConnectCore 6UL module, allowing coin-cell charger applications. This VCC_LICELL connection feeds the VSNVS regulator of the PMIC, which supplies the SNVS power domain of the CPU. This power domain allows some functionality of the CPU in low power mode applications when the main power supply of the system is removed. However, this connection significantly increases the power consumption of the coin cell/supercapacitor in this low-power mode.
To optimize power management in coin cell applications:
Do not connect the coin cell/supercapacitor to the VCC_LICELL power domain (keep the connection to VCC_MCA). This removes coin-cell charger functionality but drastically reduces power consumption and extends the life of the power supply. However, this connection significantly increases the power consumption of the coin cell/supercapacitor in this low-power mode to around 350 uA.
The power architecture of the module is described in more detail below.
The PMIC generates the following power domains that are available on the module pads:
n Buck converters. Two buck regulators provide 3.3V:
l SW1A: 3V3_INT, powers several interfaces inside the module
l SW2: 3V3_EXT, free power line not used inside the module
n And another two buck regulators used for internal supply:
l SW1B: VDD_ARM_SOC_IN
l SW3: VCC_DDR3
ConnectCore® 6UL Hardware Reference Manual
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About the ConnectCore® 6UL Power supply
Power domain Regulator
type
Output accuracy
Maximum current
Dropout voltage (MAX)
Turn on time (MAX)
Turn off time (MAX)
Quiescent current in OFF mode (TYP)
SW1A DC/DC +/-6.0 % 1.00 A - 500 us - -
SW2 DC/DC +/-6.0 % 1.25 A - 500 us - -
SW1B DC/DC +/-6.0 % 1.75 A - 500 us - -
SW3 DC/DC +/-6.0 % 1.5 A - 500 us - -
Note Maximum current includes both the module and the module carrier board consumption.
SW1: parameters specified at TA=-40 °C to 85 °C, VIN=VSW1xIN=3.6V, VSW1x=1.2 V, ISW1x=100 mA. SW2: parameters specified at TA=-40 °C to 85 °C, VIN=VSW2IN=3.6V, VSW2=3.15 V, ISW2=100 mA. SW3: parameters specified at TA=-40 °C to 85 °C, VIN=VSW3IN=3.6V, VSW3=1.5 V, ISW3=100 mA.
n LDO regulators. Four PMIC regulators are available; the module uses LDO1: VDDA_ADC_3P3.
LDO
Regulator type
Output accuracy
Maximum current
Dropout voltage (MAX)
Turn on time (MAX)
Turn off time (MAX)
Quiescent current in OFF mode (TYP)
VLDO1 1.8-3.3V +/-3.0 % 0.100 A 60 mV 500 us 10 ms 13 uA
VLDO2 0.8-1.55V +/-3.0 % 0.250 A 60 mV 500 us 10 ms 13 uA
VLDO3 1.8-3.3V +/-3.0 % 0.100 A 60 mV 500 us 10 ms 13 uA
VLDO4 1.8-3.3V +/-3.0 % 0.350 A 60 mV 500 us 10 ms 13 uA
Note Maximum current includes both the module and the module carrier board consumption.
VLDO1 parameters specified at TA=-40 °C to 85 °C, VIN=3.6V, VLDO1IN=3.6V, VLDO1=3.3V, ILDO1=10
mA.
VLDO2 parameters specified at TA=-40 °C to 85 °C, VIN=3.6V, VLDO2IN=3.0V, VLDO2=1.55V, ILDO2=10
mA.
VLDO3 parameters specified at TA=-40 °C to 85 °C, VIN=3.6V, VLDO34IN=3.6V, VLDO3=3.3V, ILDO3=10
mA.
VLDO4 parameters specified at TA=-40 °C to 85 °C, VIN=3.6V, VLDO34IN=3.6V, VLDO4=3.3V, ILDO4=10
mA.
n Boost converter. The PMIC offers a boost regulator that is not used inside the module but that
is available in the pinout of the LGA version for customizations.
Quiescent current in OFF mode (TYP)
Power domain
Regulator type
Output accuracy
SWBST DC/DC -4.0% /
Maximum current
Dropout voltage (MAX)
Turn on time (MAX)
Turn off time (MAX)
0.6 A - 2 ms - -
+3%
ConnectCore® 6UL Hardware Reference Manual
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About the ConnectCore® 6UL Power supply
Note SWBST parameters specified at TA=-40 °C to 85 °C, VIN=VSWBSTIN=3.6V, VLSWBST=5.0V,
ISWBST=100 mA.
VSYS and VSYS2 are the supply inputs to the regulators and buck converters of the PMIC. Both inputs are available on the module pads and can be connected to a single voltage input or to two different voltages on systems that require high efficiency on the power system:
n VSYS powers SW1A, SW2, LDO1 and LDO34 (shared input for LDO3 and LDO4).
n VSYS2 powers SW1B, SW3 and LDO2.
The power management IC located on the module is responsible for generating all required i.MX6UL processor supplies. Some of the I/O supplies are set on the module. See the following table:
Power domain Connection
NVCC_NAND 3V3_INT
NVCC_GPIO 3V3_INT
NVCC_SD1 3V3_INT
NVCC_UART 3V3_INT
NVCC_CSI 3V3_INT
NVCC_LCD 3V3_INT
One I/O voltage must be set externally and is left unconnected on the ConnectCore 6UL module: NVCC_ENET. See the following table for operating range of NVCC_ENET:
Power domain Min Type Max
NVCC_ENET 1.65 V 1.8/2.8/3.3 V 3.6 V
As shown in the table above, the supply has a wide operating range. In order to provide the most cost­effective and flexible solution for a given use case, the supplies listed in the table must be provided by the carrier board integrating the ConnectCore 6UL module. However, PMIC 3.3V and LDO power rails are dedicated power sources for supplying i.MX6UL power domains.
For more information related to the PMIC power-up strategy, refer to section 6.3.5 of the NXP PF3000
datasheet.

System power-up sequence

When the power supply is connected to the ConnectCore 6UL module, the PMIC and the MCA are the first components to be powered up. VIN is the PMIC input power line, while VCC_MCA is the MCA input line. The MCA starts to run as soon as it is powered up, but the PMIC follows a fixed initialization process (see the NXP PF3000 Datasheet for a full description). In this initialization, the first regulator to automatically be powered on is the VDD_SNVS_3V3. Once this regulator is up, the PMIC can be switched on by controlling the PWRON pin (the on-off control line of the PMIC). This pin is controlled by the MCA. The MCA will turn on the PMIC after a user-programmable delay (by default 50 ms).
Once the PMIC is switched on, another fixed initialization process starts and the PMIC regulators are turned on following a defined sequence. Finally the CPU reset line (POR_B_CPU), which is also controlled by the MCA, is released.
ConnectCore® 6UL Hardware Reference Manual
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About the ConnectCore® 6UL Bootstrap
The following time diagram shows the power-up sequence.

Bootstrap

The ConnectCore 6UL module can be configured to boot from different devices and interfaces as determined by the Boot ROM. The configuration of the booting process of the CPU is done through:
n BOOT_MODE register, which selects the boot mode of the processor.
n eFUSEs and/or GPIOs, which determine the boot configuration.
Four boot modes are available on the i.MX6UL processor. Selection between them is done through BOOT_MODE[1:0] bits. The bits are externally configurable on two processor IOs, whose values are latched during boot-up:
BOOT_MODE [1:0] Boot type
00 Boot from fuses
01 Serial downloader
10 Internal boot
11 Reserved
BOOT_MODE[0] and BOOT_MODE[1] are available on dedicated LGA pads on the module. However, on the castellated pads only BOOT_MODE[1] is available.
Note BOOT_MODE[0] is set to 0 internally on the module through a 100K pull-down resistor. This
means that in applications using only the castellated pads of the module, the only boot modes available are Boot from fuses and Internal boot. However, once Uboot is running, you can select a different boot mode (like serial downloader).

Boot from fuses

Boot from fuses is the recommended boot mode for production purposes. When this boot mode is selected, you must configure several parameters in order to select and configure the boot device of
ConnectCore® 6UL Hardware Reference Manual
15
About the ConnectCore® 6UL Internal boot
the system. These parameters are configured through fuses, which are burned in order to set their values. This means that the configuration is irreversible.
BOOT_CFG1 selects the boot device through BOOT_CFG1[7:4] bits:
BOOT_CFG1[7:4] Boot device
0000 NOR/OneNAND (EIM)
0001 QSPI
0011 Serial ROM (SPI)
010x SD/eSD/SDXC
011x MMC/eMMC
1xxx Raw NAND
There are many other registers that configure the different boot devices. For a complete description of the booting configuration, refer to the NXP i.MX 6UltraLite Applications Processor Reference Manual (Chapter 8: System Boot).

Internal boot

Internal boot is the recommended boot mode for development purposes. When this boot mode is selected, the selection and configuration of the booting process is done through the same registers used when booting from fuses. However, this time the values of some registers are overridden using multiple GPIOs, which are latched during power-up.
The following configuration is done internally in the ConnectCore 6UL module in order to enable booting from the NAND memory:
Bootstrap configuration Corresponding GPIO Default configuration
BOOT_CFG2[1] LCD_DATA9 100K pull-down
BOOT_CFG2[2] LCD_DATA10 100K pull-down
BOOT_CFG2[3] LCD_DATA11 100K pull-up
BOOT_CFG2[4] LCD_DATA12 100K pull-down
BOOT_CFG2[5] LCD_DATA13 100K pull-up
BOOT_CFG2[6] LCD_DATA14 100K pull-down
BOOT_CFG2[7] LCD_DATA15 100K pull-down
You must also set up BOOT_CFG1[7:0] register when booting from the internal on-module NAND when Internal boot mode is selected. It must be configured externally (outside the module) as shown in the following table:
ConnectCore® 6UL Hardware Reference Manual
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About the ConnectCore® 6UL Serial downloader
Bootstrap configuration Corresponding GPIO Configuration
BOOT_CFG1[0] LCD_DATA0 0
BOOT_CFG1[1] LCD_DATA1 0
BOOT_CFG1[2] LCD_DATA2 0
BOOT_CFG1[3] LCD_DATA3 0
BOOT_CFG1[4] LCD_DATA4 1
BOOT_CFG1[5] LCD_DATA5 0
BOOT_CFG1[6] LCD_DATA6 0
BOOT_CFG1[7] LCD_DATA7 1
Digi recommends you use 10K pull-up and pull-down resistors to configure each line.
The BOOT_CFG1 and BOOT_CFG2 register lines are not dedicated lines of the CPU. This means that the values of these lines are latched during the power-up, but have a different functionality once the system is up and running. In this case, these lines belong to the LCD interface. In order to protect the value of these registers while the system is booting, Digi recommends you use a protection circuitry as shown in sheet 3 of 7, "Boot selection," of the ConnectCore 6UL reference designs. See
ConnectCore 6UL design files.

Serial downloader

You can use the serial downloader boot mode for device recovery. The serial downloader allows you to download a program image to the chip through a USB or UART serial connection. When any of the standard boot modes is selected but the booting process doesn’t succeed (for instance due to wrong booting device or corrupted images) the CPU automatically jumps to the serial downloader boot mode.

Wireless interfaces

The ConnectCore 6UL system-on-module combines a wireless local area network (WLAN) and Bluetooth (BT) dual solution to support IEEE802.11 a/b/g/n/ac WLAN standards and BT 4.2 enabling seamless integration of WLAN/BT and Low Energy technology. Digi also offers a non-wireless variant of the ConnectCore 6UL module.
The following sections include specifications for the wireless interfaces available on the ConnectCore 6UL module.

WLAN 802.11a/b/g/n/ac

The 2.4 GHz band on the ConnectCore 6UL module supports 20/40 MHz bandwidths, and the 5 GHz band supports 20/40/80 MHz bandwidths.
The following sections specify the performance of the WLAN IEEE 802.11a/b/g/n/ac interface on the ConnectCore 6UL module.
ConnectCore® 6UL Hardware Reference Manual
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About the ConnectCore® 6UL Wireless interfaces
Modulation and data rates
The following tables list modulation values for ConnectCore 6UL module supports the following WLAN standards.
Mode
802.11b DBPSK 1 Mbps
802.11ga BPSK-1/2 6 Mbps
802.11n BPSK-1/2 MCS0
Modulation & coding
DQPSK 2 Mbps
CCK 5.5 Mbps
CCK 11 Mbps
BPSK-3/4 9 Mbps
QPSK-1/2 12 Mbps
QPSK-3/4 18 Mbps
16QAM-1/2 24 Mbps
16QAM-3/4 36 Mbps
64QAM-2/3 48 Mbps
64QAM-3/4 54 Mbps
QPSK-1/2 MCS1
Rate
QPSK-3/4 MCS2
16QAM-1/2 MCS3
16QAM-3/4 MCS4
64QAM-2/3 MCS5
64QAM-3/4 MCS6
64QAM-5/6 MCS7
ConnectCore® 6UL Hardware Reference Manual
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About the ConnectCore® 6UL Wireless interfaces
Mode
802.11ac BPSK-1/2 MCS0
Note Rates MCS8 & MCS9 are only available in receive mode.
Data rate (Mbps) - Non Short Guard Interval (Non-SGI)
Data rate (Mbps) 802.11b 802.11ga 802.11n 802.11ac
Modulation & coding
QPSK-1/2 MCS1
QPSK-3/4 MCS2
16QAM-1/2 MCS3
16QAM-3/4 MCS4
64QAM-2/3 MCS5
64QAM-3/4 MCS6
64QAM-5/6 MCS7
256QAM-3/4 MCS8
256QAM-5/6 MCS9
Rate
Modulation DBPSK CCK BPSK-
1/2
1 Mbps11Mbps6Mbps54Mbps
2.4 GHz
5 GHz HT20 6 54 6.5 65 6.5 65
Data rate (Mbps) - Short Guard Interval (SGI)
Mode
Modulation DBPSK CCK BPSK-
HT20 1 11 6 54 6.5 65 6.5 65
HT40 13.5 135 13.5 135 180
HT40 13.5 135 13.5 135 180
HT80 29.3 292.5 390
802.11b 802.11ga 802.11n 802.11ac
1/2
1 Mbps11Mbps6Mbps54Mbps
64QAM­3/4
64QAM­3/4
BPSK­1/2
MCS0 MCS7 MCS0 MCS7 MCS9
BPSK­1/2
MCS0 MCS7 MCS0 MCS7 MCS9
64QAM­5/6
64QAM­5/6
BPSK­1/2
BPSK­1/2
64QAM­5/6
64QAM­5/6
256QAM­5/6
256QAM­5/6
ConnectCore® 6UL Hardware Reference Manual
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About the ConnectCore® 6UL Wireless interfaces
Mode
2.4 GHz
5 GHz HT20 6 54 7.2 72.2 7.2 72.2
HT20 1 11 6 54 7.2 72.2 7.2 72.2
HT40 15 150 15 150 200
HT40 15 150 15 150 200
HT80 32.5 325 433.3
802.11b 802.11ga 802.11n 802.11ac
RF channels
The ConnectCore 6UL module supports the following frequency bands.
RF band
2.4 GHz20MHz
5 GHz20MHz
Ch.BWCh.
spacing Channel number (Center freq. MHz)
5 MHz 1(2412), 2(2417), 3(2422), 4(2427), 5(2432), 6(2437), 7(2442), 8(2447), 9
(2452), 10(2457), 11(2462), 12(2467), 13(2472), 14(2484)
40
5 MHz 3(2422), 11(2462)
MHz
20 MHz 36(5180), 40(5200), 44(5220), 48(5240), 52(5260), 56(5280), 60(5300), 64
(5320), 100(5500), 104(5520), 108(5540), 112(5560), 116(5580), 120(5600), 124(5620), 128(5640), 132(5660), 136(5680), 140(5700), 144(5720), 149 (5745), 153(5765), 157(5785), 161(5805), 165(5825)
40
40 MHz 38(5190), 46(5230), 54(5270), 62(5310), 102(5510), 110(5550), 118(5590),
MHz
80
80 MHz 42(5210), 58(5290), 106(5530), 122(5610), 138(5690), 155(5775)
MHz
Note Dependent upon regulatory bodies.
2.4 GHz
2.4 GHz band channel #
1 2412 ✔ ✔ ✔
2 2417 ✔ ✔ ✔
3 2422 ✔ ✔ ✔
4 2427 ✔ ✔ ✔
5 2432 ✔ ✔ ✔
6 2437 ✔ ✔ ✔
Center frequency (MHz)
126(5630), 134(5670), 142(5710), 151(5755), 159(5795)
EUROPE (ETSI)
NORTH AMERICA (FCC) JAPAN
ConnectCore® 6UL Hardware Reference Manual
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About the ConnectCore® 6UL Wireless interfaces
2.4 GHz band channel #
7 2442 ✔ ✔ ✔
8 2447 ✔ ✔ ✔
9 2452 ✔ ✔ ✔
10 2457 ✔ ✔ ✔
11 2462 ✔ ✔ ✔
12 2467 ✔ No ✔
13 2472 ✔ No ✔
14 2484 No No 802.11b only
5 GHz
5 GHz band channel # Center frequency (MHz) EUROPE (ETSI) NORTH AMERICA (FCC) JAPAN
36 5180 Indoors ✔ ✔
40 5200 Indoors ✔ ✔
Center frequency (MHz)
EUROPE (ETSI)
NORTH AMERICA (FCC) JAPAN
44 5220 Indoors ✔ ✔
48 5240 Indoors ✔ ✔
52 5260 Indoors / DFS / TPC DFS DFS / TPC
56 5280 Indoors / DFS / TPC DFS DFS / TPC
60 5300 Indoors / DFS / TPC DFS DFS / TPC
64 5320 Indoors / DFS / TPC DFS DFS / TPC
100 5500 DFS / TPC DFS DFS / TPC
104 5520 DFS / TPC DFS DFS / TPC
108 5540 DFS / TPC DFS DFS / TPC
112 5560 DFS / TPC DFS DFS / TPC
116 5580 DFS / TPC DFS DFS / TPC
120 5600 DFS / TPC No Access DFS / TPC
124 5620 DFS / TPC No Access DFS / TPC
128 5640 DFS / TPC No Access DFS / TPC
132 5660 DFS / TPC DFS DFS / TPC
136 5680 DFS / TPC DFS DFS / TPC
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About the ConnectCore® 6UL Wireless interfaces
5 GHz band channel # Center frequency (MHz) EUROPE (ETSI) NORTH AMERICA (FCC) JAPAN
140 5700 DFS / TPC DFS DFS / TPC
149 5745 SRD ✔ No Access
153 5765 SRD ✔ No Access
157 5785 SRD ✔ No Access
161 5805 SRD ✔ No Access
165 5825 SRD ✔ No Access
Note
DFS = Dynamic Frequency Selection TPC = Transmit Power Control SRD = Short Range Devices 25 mW max power
Transmit power
The following table lists nominal transmit power values for the ConnectCore 6UL module.
RF band Channel BW Standard Output power (dBm)
2.4 GHz 20 MHz 802.11b 18 (1Mbps) - 18 (11Mbps)
20 MHz 802.11g 18 (6Mbps) - 14 (54Mbps)
20 MHz 802.11n/ac 17 (MCS0) - 13 (MCS7)
40 MHz 802.11n/ac 15 (MCS0) - 13 (MCS7)
5 GHz 20 MHz 802.11a 13 (6Mbps) - 11 (54Mbps)
20 MHz 802.11n/ac 15 (MCS0) - 8 (MCS7)
40 MHz 802.11n/ac 12 (MCS0) - 7 (MCS7)
80 MHz 802.11ac 9 (MCS0) - 4 (MCS7)
Note Nominal powers are subject to regulatory domain regulations.
Note Due to manufacturing tolerance these nominal output powers may be reduced up to 3 dB.
Receiver sensitivity
The following table lists typical receive sensitivity values for the ConnectCore 6UL module.
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About the ConnectCore® 6UL Micro Controller Assist™
Mode 802.11b 802.11ga 802.11n 802.11ac
Modulation DBPSK CCK BPSK-
1/2
1 Mbps11Mbps6Mbps54Mbps
2.4 GHz
5 GHz HT20 -86 -72 -86 -67 -82 -64
Note Specification is subject to change.
HT20 -90 -84 -85 -69 -84 -65 -82 -64
HT40 -79 -61 -79 -61 -54
HT40 -79 -61 -79 -61 -54
HT80 -76 -58 -51
64QAM­3/4
BPSK­1/2
MCS0 MCS7 MCS0 MCS7 MCS9
64QAM­5/6
BPSK­1/2
64QAM­5/6
256QAM­5/6

Antenna ports

The ConnectCore 6UL module has two antenna ports: one on the module via a dedicated U.FLconnector, and another on the LGA pads. Both antenna ports support WLAN and Bluetooth functionality. You can use the control signal RF1_INT/nEXT to select between the on-module antenna port (U.FLconnector) and the external antenna port (LGA pad). This control signal has a 10K pull-up populated on the module, which means that the on-module antenna port (U.FL connector) is active by default. Pulling RF1_INT/nEXTlow activates the external antenna port and disables the on-module antenna port.

Bluetooth

The ConnectCore 6UL module supports both Bluetooth and Bluetooth Low Energy protocols:
n Bluetooth 4.2 (BT4.2); backwards compatible with BT 1.X, 2.X + Enhanced Data Rate, BT 3.X, BT
4.0 and BT 4.1 Bluetooth class 1 and class 2 power-level transmissions
n Integrated WLAN-BT coexistence

RF control signals

The following signals are not supported by the current firmware of the WLAN/BT transceiver:
n WLAN_RF_KILL# (pad B17)
n BT_RF_KILL# (pad B18)
n WLAN_LED (pad B19)
n BT_LED (pad B20)

Micro Controller Assist™

The Micro Controller Assist, orMCA, is a small microcontroller that is deeply integrated into the design of the ConnectCore 6UL module. It assists the i.MX6UL processor with advanced operations related to power management, security, and system reliability. The functionality provided by the MCA includes:
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About the ConnectCore® 6UL Micro Controller Assist™
n Advanced power management such as power key button, wake up sources, and PMIC control
in low power.
n Peripheral extensions such as RTC, watchdog, and tamper pins.
The MCA and the i.MX6UL are connected through an I2C interface and an interrupt line. The microcontroller provides up to eight general purpose IOs that can be configured with different modes to provide functionality such as digital input/output or ADC.
The i.MX6UL can update the MCA firmware over the I2C bus. See the MCAsoftware documentation for additional information about this process.

ConnectCore 6UL module lines related to the MCA

Pin number Pin name
A2 MCA_IO0 Bi-
A3 MCA_IO4 Bi-
A4 MCA_VIN_DET Input Analog Input voltage detection line. Connect to
A5 MCA_RESET Input Digital Reset input line, active low.
A6 SWD_CLK/PWR_IOInput Digital Power on/off input line, active low. SWD
Pin direction Type Definition
directional
directional
Digital and analog
Digital and analog
General purpose Input/Output.
General purpose Input/Output.
VCC_MCA.
interface clock line.
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About the ConnectCore® 6UL Micro Controller Assist™
Pin number Pin name
A7 SWD_DIO/MCA_
IO7
Pin direction Type Definition
Bi­directional
Digital General purpose Input/Ouput. SWD
interface data line.
A8 VCC_MCA Input Analog Input power supply of the MCA.
B2 MCA_IO1 Bi-
directional
B5 MCA_IO2 Bi-
Digital and
General purpose Input/Output.
analog
Digital General purpose Input/Output.
directional
B6 MCA_IO5 Bi-
directional
C3 MCA_IO3 Bi-
directional
C4 MCA_
IO6/CLKOUT32K
Bi­directional
Digital and
General purpose Input/Output.
analog
Digital and
General purpose Input/Output.
analog
Digital General purpose Input/Output. 32KHz
clock output.
W8 PWR_ON Output Digital Output power on/off line. Set to high level*
during power off.
* low level

Reset control

Asserting and de-asserting the MCA_RESET line wakes the ConnectCore 6UL module from any power mode (suspend/power off). Then, the microcontroller executes the programmed firmware.
The MCA, in cooperation with the PMIC, controls the reset line of the i.MX6UL processor (POR_B). The MCA_RESET pin is the main reset input of the ConnectCore 6UL module. This pin is a pseudo open­drain with an internal pull up. Asserting the MCA_RESET line low sets the MCA into reset state, and it remains in this state until the line is de-asserted.
During system initialization, the MCA performs the following actions:
n Asserts the PWR_ON line low for a configurable number of milliseconds (0-255 ms with a
default value of 50ms). This powers the PMIC off, switching off all regulated outputs of the
PMIC. You can disable this power cycle by setting the timer to 0.
n Asserts the PWR_ONline high to power the system on (assuming it was asserted low before).
n Keeps POR_B asserted low for a configurable number of miliseconds.
n Asserts the POR_B line high to start the execution of the firmware on the i.MX6UL processor.
The following time diagram represents the reset sequence. You can configure the reset timing. Default values are as follows:
n tr1: 50 ms
n tr2: 2 ms
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About the ConnectCore® 6UL Micro Controller Assist™
SeeSystem power-up sequencefor more information about the power-up sequence of theConnectCore 6UL.
Note ThePOR_B line is also connected to the PMIC. The PMIC won't release this line until it is
switched on andthe entire starting sequence is finished (a few ms after the latest regulator is turned on). This means that even if the MCA releases the reset line before the PMIC is ready, the CPU won't go out of reset. This occurs on the ConnectCore 6UL module: the MCA releases the CPU reset line by putting the MPU_RESET linehigh butthere's a delay since this GPIO goes high until the POR_B_CPU line goes high. The delay occurs because the PMIC is still not completely initialized.
See the MCAsoftware documentation for additional information on the configuration of the MCA.
IOs
The ConnectCore 6UL MCA provides up to eight configurable IOs.
Since the general purpose IOs do not incorporate internal pull-ups or pull-downs, you may have to add the components to the exterior of the module carrier board.
The following table lists all available MCA IOs with capabilities and module pad:
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About the ConnectCore® 6UL Micro Controller Assist™
PAD
MCA IO
LGA/CS* Digital I/O IRQ capable ADC 32KHz clock 1.2 Vref
MCA_IO0 A2/76 ✔
MCA_IO1 B2
MCA_IO2/EXT_VREF B5
MCA_IO3 C3
MCA_IO4 A3/75
MCA_IO5 B6
MCA_IO6/CLKOUT32K C4
SWD_DIO/MCA_IO7 A7/71
* CS = castellated pads
✔ ✔ ✔
✔ ✔
✔ ✔
✔ ✔
✔
✔
✔
✔ ✔
✔
✔
✔
✔
Digital IOs
All MCA IOs can be configured as digital inputs/outputs, which are powered from the MCA_VCC power rail.
The digital outputs preserve the output value set in all operating modes, except in power off and coin cell modes where the IOs are reconfigured to high impedance state to preserve power.
Note Since the general purpose IOs do not incorporate internal pull-ups or pull-downs, you may need
to add the components to the exterior of the module carrier board.
MCA IRQs
You can configure a subset of the MCA IOs as interrupt inputs, using the MCA software to configure the active edge of the interrupt (rising, falling, or both). When one or more MCA IRQs are activated, the MCA interrupts the main processor through the corresponding IRQ line, signaling the active IRQs in the IRQ status registers.The IRQ inputs can wake the system from any low power mode (suspend or power off).
See the MCA software documentation for additional information about how to configure and access the MCA IRQ lines.
Analog to Digital Converter
You can configure up to five MCA IOs as Analog to Digital channels in addition to the ones provided by the i.MX6UL CPU. The index of the MCA ADC channels corresponds to the index of the MCA IO. This means that the ADC channel 0 corresponds to the MCA_IO0, the ADC channel 1 to the MCA_IO1, and so on.
The result of the ADC conversion for a given input voltage is inversely proportional to the reference voltage of the ADC. For the MCA ADCs, the reference voltagecorresponds to the MCA_VCC voltage. (Note that the i.MX6UL ADCs have a different reference voltage.) The MCA ADC provides 12-bit of resolution with right-justified, unsigned format output. These ADCs are suitable for low-frequency sampling(under 10 Hz). For higher frequency sampling, Digi recommends the CPU ADC channels.
See the MCAsoftware documentation for additional information about how to configure and access the MCA ADCs.
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About the ConnectCore® 6UL Micro Controller Assist™
External voltage reference
The MCA_IO2/EXT_VREF pin provides an accurate voltage reference of 1.2V that can be used to provide a reference voltage for sensors and/or analog devices (such as comparators or DACs).
When this pin is used as external reference voltage or as the internal reference of the MCA analog-to­digital converter,an external capacitor of 100nF must be connectedbetween the pin and ground and as close as possible to the module pad.
The default configuration of the MCA_IO2/EXT_VREF pin is as IO. You must use software to configure the pin for external voltage reference. See the software documentation for additional information about how to control the function of this pin.
Note that the voltage reference continues normal operation in low power modes (suspend and power off). Therefore, if the voltage reference is enabled during normal operation but is not required for low power operation, Digi recommends using the software to disable it before entering low power in order to minimize the power consumption, and re-enable it when resuming normal operation.
External 32KHz clock output
The MCA_IO6/CLKOUT32K pin is a 32.768 Hz square wave output that can be used as clock input by peripherals requiring a low-frequency, high-accuracy clock.
Note The default configuration of theMCA_IO6/CLKOUT32K pin is as IO. You must use software to
configure the pin as 32KHz clock output. See the MCAsoftware documentation for additional information about how to control the function of this pin.
Note that the 32KHz clock output continues normal operation in low power modes (suspend and power off). Therefore, if the 32KHz clock output is enabled during normal operation but is not required for low power operation, Digi recommends using the software to disable it before entering low power in order to minimize power consumption, and re-enable it when resuming normal operation.

Watchdog

The MCA implements a watchdog timer in its firmware. The MCA watchdog resets the system, or only the i.MX6UL CPU, if the software running on the main processor fails to execute properly and does not reset the watchdog timer on time.
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About the ConnectCore® 6UL Micro Controller Assist™
The main featuresof the MCA watchdog include:
n Configurable timeout between 1 and 255 seconds.
n Configurableto generate interrupt or system reset.
n Configurable to generate full-system reset (including the MCA itself) or CPU-only reset. Full-
system reset can include a PMIC off/on, depending on the device configuration.
See the MCAsoftware documentation for additional information about how to configure and access the watchdog timer.

Real-time clock

The MCA implements a Real-Time Clock (RTC) in its firmware. The i.MX6UL CPU internal RTCs are disabled by default because the MCA RTC is preferred due to its superior power consumption efficiency. To preserve the date during power-off, you must connect a coin cell battery following the design notes provided in the Power Supply Architecture section. You must also connect the MCA line VIN_PRESENT following the design guidelines inPower supply architecture in order to detect power loss and automatically switch to RTC mode.
The main features of the MCA RTC include:
n Date/time registers to keep the system time (backed up by the coin cell battery).
n Programmable alarm to generate and interrupt. This alarm can be used to wake the system
from low power modes (suspend and power off).
See the MCAsoftware documentation for additional information about how to configure and access the watchdog timer.

Tamper support

The tamper interface provides a mechanism to detect any unauthorized attempt to access the system, such as the opening of the enclosure. The tamper support included in the ConnectCore 6UL is implemented in the MCA with the following capabilities:
n Configure up to two tamper interfaces, each with an optional digital output.
n Rely on tamper detection event in power-off and coin cell (battery backup) modes.
n Register tamper event(s) in the non-volatile memory of the MCA.
n Alert the host CPU when a tamper event occurs.
n Respond to a tamper attack with actions such as erasing a critical data partition of the flash.
Tamper pins
The ConnectCore 6UL module supports up to two tamper interfaces (tamper0 and tamper1). Each interface has an associated IO (tamper pin) used to detect the tamper event (through a voltage transition on the IO) and, optionally, an output IO (tamper output) that can be used to enable or disable peripherals, for instance to cut the power of a peripheral. The IOs of each tamper interface can be configured independently and have the following configuration options:
n The MCA IO used for tamper detection, from the available MCA IOs that are IRQ-capable.
n The active level (tampering) of the tamper input.
n The MCA IO used as tamper output, when enabled, that is activated when a tamper condition
has not been acknowledged.
n The logic level that is set in the tamper output when a tamper event occurs.
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About the ConnectCore® 6UL Micro Controller Assist™
The MCA IO table provides information about the capabilities of the MCA IO pins so you can easily identify suitable IOs to be used as tamper inputs. Any MCA IO pin can be configured as tamper output.
Tamper pin configuration
To learn ore about tamper pin configuration, see Tamper detection interface in the software documentation.

Power management

The MCA plays a key role in the power management activities of the ConnectCore 6UL module. In cooperation with the i.MX6UL processor, the MCA controls the power states of the PMIC, provides multiple wake up sources to transition between power modes. It also allocates dedicated signals to capture power events and indicate the system power state, allowing you to control external power sources and indicators.
Power modes
The module provides four different power operating modes: ON/RUN, OFF, SUSPEND, and COIN-CELL. The following figure shows the state diagram and the events to switch between states.
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