Atmark Techno Armadillo-400 Series User manual

Armadillo-400 Series
Hardware Manual
Version 1.3.0
2010/11/05
Atmark Techno, Inc.
Armadillo Developers Site

Armadillo-400 Series Hardware Manual
Atmark Techno, Inc.
060-0035 AFT Bldg. 6F, N5E2, Chuo-ku, Sapporo
TEL [phone] FAX [phone]
製製製製 © 2010 Atmark Techno, Inc.
Version 1.3.0
2010/11/05


1. Preface ................................................................................................................................................. 7
1.1. Document Structure ...................................................................................................................... 7
1.2. Icons .......................................................................................................................................... 7
2. Precautions ............................................................................................................................................ 9
2.1. Safety Precautions ........................................................................................................................ 9
2.2. Handling Precautions .................................................................................................................... 9
2.3. Software Usage Precautions ......................................................................................................... 10
2.4. Electromagnetic Interference ........................................................................................................ 10
2.5. Trademarks ............................................................................................................................... 10
3. Overview ............................................................................................................................................ 11
3.1. Board Overview ......................................................................................................................... 11
3.2. Block Diagram .......................................................................................................................... 13
4. Memory Map ....................................................................................................................................... 14
4.1. Physical Memory Map ................................................................................................................ 14
5. Interface Specifications .......................................................................................................................... 15
5.1. Interface Layout ......................................................................................................................... 15
5.1.1. Armadillo-420 Interface Layout .......................................................................................... 15
5.1.2. Armadillo-440 Interface Layout .......................................................................................... 16
5.2. Electrical Specifications .............................................................................................................. 17
5.3. CON1 (microSD slot) ................................................................................................................. 18
5.4. CON2, CON7 (LAN Interface) ..................................................................................................... 19
5.5. CON3, CON4 (Serial Interface) .................................................................................................... 20
5.6. CON5, CON6 (USB Interface) ...................................................................................................... 22
5.7. CON8 (External Reset Terminal) .................................................................................................. 23
5.8. CON9 (Expansion Interface 1) ...................................................................................................... 24
5.9. CON10 (i.MX257 JTAG Interface) ................................................................................................ 25
5.10. CON11 (LCD Interface) ............................................................................................................ 26
5.11. CON12, CON13 (Power In Connector) ......................................................................................... 29
5.12. CON14 (Expansion Interface 2) .................................................................................................. 29
5.13. LED1, LED2 (LAN LEDs) ......................................................................................................... 30
5.14. LED3, LED4, LED5 (User LEDs) ............................................................................................... 30
5.15. SW1 (User Switch) ................................................................................................................... 30
5.16. JP1 (Boot Mode Configuration Jumper) ........................................................................................ 31
5.17. JP2 (User Jumper) .................................................................................................................... 31
5.18. Power Circuit Make-up .............................................................................................................. 31
6. Reference Circuits ................................................................................................................................ 34
7. Board Outline Diagrams ......................................................................................................................... 36
7.1. Armadillo-420 Board Outline Diagrams ......................................................................................... 36
7.2. Armadillo-440 Board Outline Diagrams ......................................................................................... 38
8. Armadillo-440 LCD Expansion Board ...................................................................................................... 40
8.1. Board Overview ......................................................................................................................... 40
8.2. Interface Layout ......................................................................................................................... 41
8.3. Board Outline Diagrams .............................................................................................................. 42
8.4. About Defective LCD Pixels ........................................................................................................ 43
8.4.1. Pixel Defect Definitions .................................................................................................... 43
8.4.2. Examination Standard ....................................................................................................... 44
9. RTC Option Module .............................................................................................................................. 45
9.1. Board Overview ......................................................................................................................... 45
9.2. Interface Layout ......................................................................................................................... 46
9.3. Board Outline Diagrams .............................................................................................................. 47
9.4. RTC Module Assembly ............................................................................................................... 48
10. Case ................................................................................................................................................. 49
10.1. Case Details ............................................................................................................................ 49
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10.2. Case Dimensions ...................................................................................................................... 50
A. JTAG Conversion Cable (OP-JC8P25-00) ................................................................................................ 51
B. Initial Configuration State of Expansion Interfaces ..................................................................................... 53
C. Connector Information .......................................................................................................................... 57
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
3.1. Armadillo-400 Series Block Diagram ..................................................................................................... 13
5.1. Armadillo-420 Interface Layout ............................................................................................................ 15
5.2. Armadillo-440 Interface Layout ............................................................................................................ 16
5.3. microSD Card Insertion and Removal .................................................................................................... 19
5.4. EXT_RESET* Timing Chart ................................................................................................................ 23
5.5. EXT_RESET* Circuit Make-up ............................................................................................................ 24
5.6. AC Adapter Polarity Mark ................................................................................................................... 29
5.7. Armadillo-400 Series Power Circuit Make-up Diagram ............................................................................. 32
5.8. Armadillo-400 Series Power Sequence ................................................................................................... 32
6.1. GPIO Reference Circuits ..................................................................................................................... 34
6.2. Keypad Signals Reference Circuit ......................................................................................................... 35
6.3. CAN Signals Reference Circuit ............................................................................................................. 35
7.1. Armadillo-420 Board Outline and Fixing Hole Measurements .................................................................... 36
7.2. Armadillo-420 Connector Center Measurements ...................................................................................... 36
7.3. Armadillo-420 Connector Hole Measurements ......................................................................................... 37
7.4. Armadillo-440 Board Outline and Fixing Hole Measurements .................................................................... 38
7.5. Armadillo-440 Connector Center Measurements ...................................................................................... 38
7.6. Armadillo-440 Connector Hole Measurements ......................................................................................... 39
8.1. LCD Expansion Board Interface Layout ................................................................................................. 41
8.2. LCD Expansion Board Dimensions and Fixing Hole Measurements ............................................................. 42
8.3. LCD Expansion Board Connector Locations ............................................................................................ 43
9.1. RTC Option Module Interface Layout .................................................................................................... 46
9.2. RTC Option Module Dimensions .......................................................................................................... 47
9.3. RTC Module Assembly Diagram .......................................................................................................... 48
10.1. Armadillo-400 Case Dimensions ......................................................................................................... 50
A.1. JTAG Conversion Cable Connection Diagram ........................................................................................ 51
A.2. JTAG Conversion Cable Reference Circuit ............................................................................................. 52
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
3.1. Armadillo-400 Series Board Specifications ............................................................................................. 11
4.1. Armadillo-400 Series Physical Memory Map ........................................................................................... 14
5.1. Armadillo-420 Interfaces ..................................................................................................................... 15
5.2. Armadillo-440 Interfaces ..................................................................................................................... 16
5.3. Input/Output Interface Rated Absolute Maximum ..................................................................................... 17
5.4. Input/Output Interface Electrical Specifications ........................................................................................ 17
5.5. CON1 Signals ................................................................................................................................... 18
5.6. CON2 Signals ................................................................................................................................... 19
5.7. CON7 Signals ................................................................................................................................... 20
5.8. CON3 Signals ................................................................................................................................... 21
5.9. CON4 Signals ................................................................................................................................... 21
5.10. CON5 Signals .................................................................................................................................. 22
5.11. CON6 Signals .................................................................................................................................. 23
5.12. CON8 Signals .................................................................................................................................. 23
5.13. CON9 Signals .................................................................................................................................. 24
5.14. CON9 Signal Multiplex ..................................................................................................................... 25
5.15. CON10 Signals ................................................................................................................................ 26
5.16. CON11 Signals ................................................................................................................................ 26
5.17. CON11 Signal Multiplex ................................................................................................................... 27
5.18. CON13 Signals ................................................................................................................................ 29
5.19. CON14 Signals ................................................................................................................................ 29
5.20. CON14 Signal Multiplex ................................................................................................................... 30
5.21. LAN LED Meanings ......................................................................................................................... 30
5.22. User LED Functions .......................................................................................................................... 30
5.23. User Switch Function ........................................................................................................................ 31
5.24. Boot Mode Configuration Jumper Behavior ........................................................................................... 31
5.25. User Jumper Function ........................................................................................................................ 31
8.1. Armadillo-400 LCD Expansion Board Specifications ................................................................................ 40
8.2. Compatible LCD Module Specifications ................................................................................................. 40
8.3. LCD Expansion Board Interface Details ................................................................................................. 41
8.4. Defect Tolerance Range ...................................................................................................................... 44
9.1. RTC Option Module Specifications ....................................................................................................... 45
9.2. RTC Option Module Interface Details .................................................................................................... 46
10.1. Armadillo-400 Case Set Details ........................................................................................................... 49
B.1. Signal State of Expansion Interfaces (After i.MX257 Reset) ...................................................................... 53
B.2. Signal State of Expansion Interfaces (After Bootloader Configuration) ........................................................ 54
C.1. Connector Product Numbers List .......................................................................................................... 57
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1. Preface
TheArmadilloSeriesaresmallhigh-performancelow-powergeneralpurposeboardswhichincorporateARMCPUcores.
Linux (kernel 2.6) is employed as the standard operating system, providing access to a rich array of software resources and
proven stability. All boards include network interfaces as standard which, combined with the Linux network protocol stack,
enable simple development of network ready devices.
The Armadillo-400 Series models provide improved performance over existing products of the same class, while at the
same time also offering even lower power consumption. The Armadillo-400 Series is comprised of two products, the low
cost Armadillo-420 and the Armadillo-440 which can readily support multimedia functionality with the addition of an
expansion board.
Armadillo-400 Series boards have interfaces which are often required for embedded devices, such as serial, Ethernet,
USB, storage (microSD) and GPIO. In addition to these, multimedia functionality including LCD, touch screen and audio
interfaces can be added to Armadillo-440 via an expansion board. Other functionality such as a real-time clock and wireless
LAN can also be added with optional modules.
Armadillo-420 is available together with the RTC Option Module as the Armadillo-420 Basic Model. Armadillo-440
together with the LCD Expansion Board is known as the Armadillo-440 LCD Model.
This document covers the hardware specifications of the Armadillo-400 Series. For guidance on how to use the default
software,pleaseseethe"Armadillo-420BasicModelDevelopment Set Start-upGuide"andthe"Armadillo-440 LCD Model
Development Set Start-up Guide". When customizing the software, please refer to the "Armadillo-400 Series Software
Manual".
1.1. Document Structure
This document covers the following points of required information for using the Armadillo-400 Series boards.
• Hardware Overview
• Memory Map
• Interface Specifications
• Board Layout
1.2. Icons
Icons are used in the following way in this document.
This is used for precautions.
Armadillo-400 Series Hardware Manual Preface
7

This is used for helpful information.
Armadillo-400 Series Hardware Manual Preface
8

2. Precautions
2.1. Safety Precautions
In order to use this product safely, please take special note of the following precaution.
This product uses semiconductor components designed for generic electronics
equipment such as office automation equipment, communications equipment,
measurement equipment and machine tools. Do not incorporate the product into
devices such as medical equipment, traffic control systems, combustion control
systems, safety equipment and so on which can directly threaten human life or pose
a hazard to the body or property due to malfunction or failure. Moreover, products
incorporating semiconductor components can be caused to malfunction or fail due
to foreign noise or surge. To ensure there will be no risk to life, the body or property
even in the event of malfunction or failure, be sure to take all possible measures in
safety system design, such as using protection circuits like limit switches or fuse
breakers, or system redundancy.
2.2. Handling Precautions
Please pay attention to the following points when handling the product in order to avoid causing any irreversible damage.
Areas Easily Damaged The microSD connector and its cover and the connectors of the flat cable
connectingArmadillo-440 and theLCDExpansionBoard can beeasilydamaged.
Please be careful not to damage them by handling them with too much force.
Modifications To This Product Please take note that any modifications[1] made to this product are not covered
under warranty. Also, please ensure to undertake a full operational check of this
product before carrying out any modifications or mounting connectors[2].
Mounting and Dismounting of
Connectors While Powered On Apartfrom hot-pluggable interfaces(LAN, USB, Mic,Headphone), do notunder any circumstances add or remove connectors while power is supplied to this
product or peripheral circuits.
Static Electricity As CMOS devices are used in this product, please store it in antistatic packaging
(such as that it was shipped in) until time of use.
Latch-up Excessivenoiseorasurgefromthe powersupplyorinput/output,orsharpvoltage
fluctuations can lead to the CMOS devices incorporated in the board causing a
latch-up.Oncethelatch-upoccurs, this situation continues until the power supply
is disconnected, and therefore can damage the devices. Measures such as adding
a protection circuit to noise-susceptible input/output lines or not sharing the
powersupplywithdevicesthatcanbethecauseofnoisearehighlyrecommended.
Physical Stress Please avoid strong physical stress such as drops or other impacts.
[1]With the exception of adding connectors to unmounted interfaces.
[2]Whenmountingconnectors,pleaseensuretoapplymasking,avoidsolderresiduecomingincontactwithsurroundingpartsandavoidcreatingsolderballs.
Armadillo-400 Series Hardware Manual Precautions
9

2.3. Software Usage Precautions
About Software Contained In This
Product The software and documentation contained in this product is provided “AS IS” without warranty of any kind including warranty of merchantability or fitness for
a particular purpose, reliability, correctness or accuracy. Furthermore, no
guaranteeismadeinregardtoanyoutcomesresultingfromtheuseofthisproduct.
2.4. Electromagnetic Interference
Both Armadillo-420 and Armadillo-440 have been recognized as Class A
Information Technology Equipment[3] under VCCI Council standards. There are
cases where this type of equipment can cause electromagnetic interference when
used in home environments. In this situation, the user may be required to take
appropriate measures to alleviate the problem.
The Armadillo-440 LCD Model (Armadillo-440 together with the LCD Expansion
Board fixed on an acrylic board) does not meet the VCCI standard and can cause
electromagnetic interference.
In order to clear Class A when using the LCD Expansion Board included in the
Armadillo-440LCDModel,itisnecessarytostrengthenthegroundoftheexpansion
board. For example, by using a metal instead of acrylic board or connecting the
fixing holes of the Armadillo-440 and the LCD Expansion Board with a wide
conducting line.
Please be aware of the following point when newly designing an expansion board which connects to the LCD interface
on Armadillo-440.
Withanexpansionboardthatincludesadevicethathaslargepowerusefluctuations,
such as with an audio amp, when only the GND line of the flexible flat cable (FCC)
is connected the expansion board may produce electromagnetic noise. To mitigate
the noise, strengthening of the expansion board's ground is recommended. For
example, by connecting the fixing holes of the Armadillo-440 and expansion board
by metal plate or wide conducting line.
2.5. Trademarks
Armadillo is a registered trademark of Atmark Techno, Inc. All other company names, product names and related
trademarks are the property of their respective owners.
[3]This product cleared Class A when tested with the AC adapter included in the Development Set (UNIFIVE US300520).
Armadillo-400 Series Hardware Manual Precautions
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3. Overview
3.1. Board Overview
The main specifications of the Armadillo-400 Series are as follows.
 3.1 Armadillo-400 Series Board Specifications
Armadillo-420 Armadillo-440
Processor Freescale i.MX257 (MCIMX257)
Processor
Functions
ARM926EJ-S Core
Instruction / Data Cache: 16KByte / 16KByte
Internal SRAM: 128KByte
Thumb code (16bit instruction set) support
System Clock CPU Core Clock: 400MHz BUS Clock: 133MHz
Oscillator Clock: 32.768kHz, 24MHz
SDRAM LPDDR SDRAM: 64MByte (16bit width)
Micron MT46H64M16LFCK-6 IT LPDDR SDRAM: 128MByte (16bit width) Micron MT46H32M16LFBF-6 IT
Flash Memory
NOR Flash Memory: 16MByte (16bit
width)
Numonyx PC28F128P30BF
Maximum Write Cycles: 100,000
NOR Flash Memory: 32MByte (16bit width)
Numonyx PC28F256P30BF
Maximum Write Cycles: 100,000
Ethernet 10BASE-T/100BASE-TX with AUTO-MDIX
Serial (UART)
3 channels max[1]
UART2:
• RS232C level
• flow control pins (CTS, RTS, DTR,
DSR, DCD, RI)
• Max baud rate: 230.4kbps
UART3[2]/UART5[2]:
• +3.3V CMOS levels
• flow control pins (CTS, RTS)
• Max baud rate: 4Mbps
4 channels max[1]
UART2:
• RS232C level
•flow control pins (CTS, RTS, DTR, DSR,
DCD, RI)
• Max baud rate: 230.4kbps
UART3[2]/UART4[3]/UART5[2]:
• +3.3V CMOS levels
• flow control pins (CTS, RTS)
• Max baud rate: 4Mbps
Armadillo-400 Series Hardware Manual Overview
11

Armadillo-420 Armadillo-440
USB
2 channels (USB 2.0, Host)
USBOTG (USBPHY1):
• High Speed support
• Type-A connector (lower port)
USBHOST (USBPHY2):
• Full Speed support
• Type-A connector (upper port)
SD/MMC 2 channels max[1] SDHC1: microSD slot
SDHC2[2]: pin header
LCD I/F Max resolution: SVGA (800x600), 18bpp
Connector Type: 50 pin FFC connector (0.5mm
pitch)
TouchPanelI/F 4-Wire Resistive
Expansion I/F
Audio I2S: 1 channel max[1](AUD6[2])
I2C製 1 channel max[1](I2C2[4])
SPI: 2 channels max[1](CSPI1[2], CSPI3[2])
GPIO: 24bit max[1]
Audio I2S: 2 channels max[1](AUD5[3],
AUD6[2])
I2C: 2 channels max[1](I2C2[4], I2C3[3])
SPI: 2 channels max[1](CSPI1[2], CSPI3[2])
Keypad Interface: 4 x 6 matrix (24 keys) max[1]
[3]
GPIO: 35bit max[1]
Switch Tact Switch x1
LED Red LED (φ3mm) x 1
Green LED (φ3mm) x 1
Yellow LED (surface mount) x 1
Debug I/F 8 pin (2.54mm pitch)[5]
Board Size 75.0 x 50.0mm (excluding protrusions)
Power Supply
Voltage DC3.1 - 5.25V[6]
Power
Consumption 1.2W approx.[7] 1.2W approx. (Armadillo-440 only)[7]
2.0W approx. (Armadillo-440 with LCD
Expansion Board)[7]
Operating
Temperature -20 - 70製 (with no condensation)
[1]This is the number of channels available when the signal multiplex function on the i.MX257 is configured giving the most priority to this function.
[2]It is possible to assign this function to Expansion Interface 1 (CON9) with the signal multiplex function on i.MX257.
[3]It is possible to assign this function to the LCD Interface (CON11) with the signal multiplex function on i.MX257.
[4]It is possible to assign this function to Expansion Interface 2 (CON14) with the signal multiplex function on i.MX257.
[5]It is possible to convert this interface to the standard ARM 20 pin layout with the JTAG Conversion Cable (OP-JC8P25-00) option. For details, please
see 製製 A JTAG Conversion Cable (OP-JC8P25-00).
[6]There are certain limits to USB device supply current when operating on a voltage less than 4.75V. Please see 製5.6. CON5, CON6 (USB Interface)製 for
more details.
[7]Does not include USB and SD device power consumption.
Armadillo-400 Series Hardware Manual Overview
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3.2. Block Diagram
The Armadillo-400 Series block diagram is shown below.
 3.1 Armadillo-400 Series Block Diagram
Armadillo-400 Series Hardware Manual Overview
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4. Memory Map
4.1. Physical Memory Map
The physical memory map of the Armadillo-400 Series is as shown.
 4.1 Armadillo-400 Series Physical Memory Map
Start
Address End Address Device Memory
Area Data Port Width
Armadillo-420 Armadillo-440
0x0000 0000 0x0000 3FFF i.MX257 Internal ROM (16KByte)
0x0000 4000 0x0040 3FFF Reserved
0x0040 4000 0x0040 8FFF i.MX257 Internal ROM (20KByte)
0x0040 9000 0x3FFF FFFF Reserved
0x4000 0000 0x6FFF FFFF i.MX257 Internal Register[1]
0x7000 0000 0x77FF FFFF Reserved
0x7800 0000 0x7801 FFFF i.MX257 Internal RAM (128KByte)
0x7802 0000 0x7FFF FFFF Reserved
0x8000 0000 0x83FF FFFF LPDDR SDRAM
(64MByte) LPDDR SDRAM
(128MByte) CSD0 16bit
0x8400 0000 0x87FF FFFF Reserved
0x8800 0000 0x8FFF FFFF Reserved
0x9000 0000 0x9FFF FFFF Reserved CSD1
0xA000 0000 0xA0FF
FFFF Nor Flash Memory (16MByte) Nor Flash Memory
(32MByte) CS0 16bit0xA100 0000 0xA1FF
FFFF Reserved
0xA200 0000 0xA7FF
FFFF Reserved
0xA800 0000 0xAFFF
FFFF Reserved CS1
0xB00 0000 0xB1FF
FFFF Reserved CS2
0xB200 0000 0xB3FF
FFFF Reserved CS3
0xB400 0000 0xB5FF
FFFF Reserved CS4
0xB600 0000 0xB800 0FFF Reserved
0xB800 1000 0xBB00
1FFF i.MX257 Internal Register[1]
0xBB01 2000 0xBFFF
FFFF Reserved
0xC000 0000 0xFFFFFFFF Reserved
[1]For details on the internal registers on the i.MX257, please refer to the "i.MX25 Multimedia Applications Processor Reference Manual" stored in the /
document/datasheet directory on the included DVD.
Armadillo-400 Series Hardware Manual Memory Map
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5. Interface Specifications
5.1. Interface Layout
5.1.1. Armadillo-420 Interface Layout
 5.1 Armadillo-420 Interface Layout
 5.1 Armadillo-420 Interfaces
Part Number Interface Shape Notes
CON1 microSD slot Hinge type
CON2 LAN Interface RJ-45
CON3 Serial interface D-Sub 9 pin (male)
CON4 Serial interface 10 pin (2.54mm pitch) Signal lines shared with CON3
CON5 USB interface Type-A 2 port stack
CON6 USB interface 4 pin (2mm pitch) Signal lines shared with lower port of
CON5
CON7 LAN Interface 10 pin (2.54mm pitch) Some signal lines shared with CON2
CON8 Ext. reset terminal 2 pin (2.54mm pitch)
CON9 Expansion Interface 1 28 pin (2.54mm pitch)
CON10 i.MX257 JTAG interface 8 pin (2.54mm pitch)
CON12 Power in connector DC jack
CON13 Power in connector 4 pin (2.54 mm pitch)
CON14 Expansion Interface 2 4 pin (2.54 mm pitch)
LED1 Link LED (green) Surface mounted LCD Shown on upper part of CON2
LED2 Activity LED (yellow) Surface mounted LCD Shown on upper part of CON2
LED3 User LED (red) φ3mm LED
LED4 User LED (green) φ3mm LED
Armadillo-400 Series Hardware Manual Interface Specifications
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Part Number Interface Shape Notes
LED5 User LED (yellow) Surface mounted LCD
SW1 User switch Tact Switch h=17mm
JP1 Boot mode jumper 2 pin (2.54mm pitch)
JP2 User jumper 2 pin (2.54mm pitch)
5.1.2. Armadillo-440 Interface Layout
 5.2 Armadillo-440 Interface Layout
 5.2 Armadillo-440 Interfaces
Part Number Interface Shape Notes
CON1 microSD slot Hinge type
CON2 LAN Interface RJ-45
CON3 Serial interface D-Sub 9 pin (male)
CON4 Serial interface 10 pin (2.54mm pitch) Signal lines shared with CON3
CON5 USB interface Type-A 2 port stack
CON6 USB interface 4 pin (2mm pitch) Signal lines shared with lower port of
CON5
CON7 LAN Interface 10 pin (2.54mm pitch) Some signal lines shared with CON2
CON8 Ext. reset terminal 2 pin (2.54mm pitch)
CON9 Expansion Interface 1 28 pin (2.54mm pitch)
CON10 i.MX257 JTAG interface 8 pin (2.54mm pitch)
CON11 LCD Interface 50 pin (0.5mm pitch)
CON12 Power in connector DC jack
CON13 Power in connector 4 pin (2.54 mm pitch)
CON14 Expansion Interface 2 4 pin (2.54 mm pitch)
LED1 Link LED (green) Surface mounted LCD Shown on upper part of CON2
LED2 Activity LED (yellow) Surface mounted LCD Shown on upper part of CON2
LED3 User LED (red) φ3mm LED
LED4 User LED (green) φ3mm LED
Armadillo-400 Series Hardware Manual Interface Specifications
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Part Number Interface Shape Notes
LED5 User LED (yellow) Surface mounted LCD
SW1 User switch Tact Switch h=17mm
JP1 Boot mode jumper 2 pin (2.54mm pitch)
JP2 User jumper 2 pin (2.54mm pitch)
5.2. Electrical Specifications
The electrical specifications of the input/output interfaces are shown in 製製 5.4. Input/Output Interface Electrical
Specifications 製 . With the Software Pad Control (SW_PAD_CTL) and Drive Voltage Select Group Control
(SW_PAD_CTL_GRP_DVS) registers in i.MX257 it is possible to alter the output current (Std, High, Max), slew rate
(Slow, Fast), and pull-up/pull-down.
 5.3 Input/Output Interface Rated Absolute Maximum
Symbol Parameter Min Max Units
VImax Input voltage range –0.5 OVDD+0.3 V
 5.4 Input/Output Interface Electrical Specifications
Symbol Parameter Min Max Units Conditions
VIH CMOS High-Level Input
Voltage 0.7 x OVDD OVDD V OVDD = +3.3V
VIL CMOS Low-Level Input
Voltage -0.3 0.3 x OVDD V OVDD = +3.3V
VOH CMOS High-Level Output
Voltage
OVDD-0.15 V IOH = -1mA
0.8 x OVDD V IOH = Specified
Drive
VOL CMOS Low-Level Output
Voltage 0.15 V IOL = 1mA
0.2 x OVDD V IOL=SpecifiedDrive
IOH_S High-Level Output Current,
Slow Slew Rate
-2.0 mA VOH = 0.8 x OVDD,
Std Drive
-4.0 mA VOH = 0.8 x OVDD,
High Drive
-8.0 mA VOH = 0.8 x OVDD,
Max Drive
IOH_F High-Level Output Current,
Fast Slew Rate
-4.0 mA VOH = 0.8 x OVDD,
Std Drive
-6.0 mA VOH = 0.8 x OVDD,
High Drive
-8.0 mA VOH = 0.8 x OVDD,
Max Drive
IOL_S Low-Level Output Current,
Slow Slew Rate
2.0 mA VOL = 0.2 x OVDD,
Std Drive
4.0 mA VOL = 0.2 x OVDD,
High Drive
8.0 mA VOL = 0.2 x OVDD,
Max Drive
Armadillo-400 Series Hardware Manual Interface Specifications
17

Symbol Parameter Min Max Units Conditions
IOL_F Low-Level Output Current,
Fast Slew Rate
4.0 mA VOH = 0.2 x OVDD,
Std Drive
6.0 mA VOH = 0.2 x OVDD,
High Drive
8.0 mA VOH = 0.2 x OVDD,
Max Drive
IIN
Input Current (no PU/PD[1])0.1 製A VI = 0
0.06 製A VI = OVDD = +3.3V
Input Current (22k製PU) 117 184 製A VI = 0
0.0001 0.0001 製A VI = OVDD = +3.3V
Input Current (47k製PU) 54 88 製A VI = 0
0.0001 0.0001 製A VI = OVDD = +3.3V
Input Current (100k製PU) 25 42 製A VI = 0
0.0001 0.0001 製A VI = OVDD = +3.3V
Input Current (100k製PD) 0.0001 0.0001 製A VI = 0
25 42 製A VI = OVDD = +3.3V
ICC High-impedance Supply
Current 1.2 製A VI = 0
1.2 製A VI = OVDD = +3.3V
[1]PU=Pull Up, PD=Pull Down
5.3. CON1 (microSD slot)
CON1 is a microSD/microMMC slot connected to a SD/MMC controller (SDHC1) in i.MX257. microSD card power
supply can be controlled[1] with the NFRE_B (GPIO3_27) pin on i.MX257.
 5.5 CON1 Signals
Pin Number Signal Name I/O Function
1 SD1_DAT2 In/Out Data bus (bit 2),
connected to SD1_DATA2 pin on i.MX257
2 SD1_DAT3 In/Out Data bus (bit 3),
connected to SD1_DATA3 pin on i.MX257
3 SD1_CMD In/Out Command / Response,
connected to SD1_CMD pin on i.MX257
4 VDD Power Power (+3.3V_CPU)[1]
5 SD1_CLK Out Clock,
connected to SD1_CLK pin on i.MX257
6 VSS Power Power (GND)
7 SD1_DAT0 In/Out Data bus (bit 0),
connected to SD1_DATA0 pin on i.MX257
8 SD1_DAT1 In/Out Data bus (bit 1),
connected to SD1_DATA1 pin on i.MX257
9 SD1_CD* In Card detect (low: card inserted, high: card ejected)
connected to NFRB (GPIO3_31) pin on i.MX257
[1]The combined maximum output current of CON1, CON4, CON7 and CON10 is 200mA.
[1]After the NFRE_B (GPIO3_27) pin on i.MX257 is set to GPIO output mode, power supply will start on a low signal and stop on a high signal.
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CON1 is a hinge type connector. The cover on the connector must be opened in order to insert and remove the card. When
opening, the cover should first be unlocked by sliding the upper part of the connector horizontally in the directory shown
by the OPEN arrow.
 5.3 microSD Card Insertion and Removal
CON1 is not hot-pluggable. Be sure to turn off the power supply before inserting
or removing a microSD card.
Please ensure to leave the cover on CON1 in a locked state, regardless of whether
a microSD card is inserted or not. If the cover is left unlocked when a microSD is
not inserted, the internal contact of the connector may come into contact with the
cover and cause the board to reset.
Information on tested microSD / microMMC cards is available on the Armadillo
Developers Site and is updated regularly.
5.4. CON2, CON7 (LAN Interface)
CON2 and CON7 are a 10BASE-T/100BASE-TX LAN interface which can be used with Category 5 or above Ethernet
cables. The interface includes AUTO-MDIX functionality allowing it to automatically detect straight or cross cable
connections and swap the send and receive terminals accordingly.
 5.6 CON2 Signals
Pin Number Signal Name I/O Function
1 TX+ Out Differential twisted pair transmit (+), signal line shared with CON7 (pin
1)
2 TX- Out Differential twisted pair transmit (-), signal line shared with CON7 (pin
4)
3 RX+ In Differential twisted pair receive (+), signal line shared with CON7 (pin
3)
4 - - 75製 terminal after connection with CON2 (pin 5), signal line shared with
CON7 (pin 5)
5 - - 75製 terminal after connection with CON2 (pin 4), signal line shared with
CON7 (pin 5)
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Pin Number Signal Name I/O Function
6 RX- In Differential twistedpairreceive(-), signallinesharedwith CON7(pin6)
7 - - 75製 terminal after connection with CON2 (pin 8), signal line shared with
CON7 (pin 7)
8 - - 75製 terminal after connection with CON2 (pin 7), signal line shared with
CON7 (pin 7)
 5.7 CON7 Signals
Pin Number Signal Name I/O Function
1 TX+ Out Differential twisted pair transmit (+),
signal line shared with CON2 (pin 1)
2 ACTIVITY_LED Out Activity indicator
(low: data transmit/receive, high: no data)
3 RX+ In Differential twisted pair receive (+),
signal line shared with CON2 (pin 3)
4 TX- Out Differential twisted pair transmit (-),
signal shared with CON2 (pin 2)
5 - - 75製 terminal, signal line shared with CON2 (pins 4, 5)
6 RX- In Differential twisted pair receive (-),
signal line shared with CON2 (pin 6)
7 - - 75製 terminal, signal line shared with CON2 (pins 7, 8)
8 LINK_LED - Link indicator
(low: link established, high: no link)
9 +3.3V_CPU Power Power (+3.3V_CPU)[1]
10 GND Power Power (GND)
[1]The combined maximum output current of CON1, CON4, CON7 and CON10 is 200mA.
As CON2 and CON7 share the same signal lines they cannot both be used at the
same time. Please be sure to use only one of the connectors.
5.5. CON3, CON4 (Serial Interface)
CON3 and CON4 are an asynchronous serial interface connected to a UART controller in the i.MX257. Although CON3
and CON4 have differing connector types and pin layouts, they share the same serial signal lines.
• Signal input/output levels: RS232C levels
• Max data rate: 230.4kbps
• Flow control: CTS, RTS, DTR, DSR, DCD, RI
• Controller: i.MX257 internal UART controller (UART2)
• CON3 connector type: D-Sub 9 pin
• CON4 connector type: 10 pin (2x5, 2.54mm pitch)
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