SmartBadge version 4

The fourth version of the SmartBadge builds on the lessons learned from the three earlier iterations which have been used in classes at KTH (Mobile Personal Communications module of the Telecommunications "finger" course during Spring 1997, 1998, 1999) and University of Wollongong (during Summer 1997). This version was designed in late 1999 by Dr. Mark T. Smith of HP Labs.

We encourage you to use the information from these pages, but would ask that you site as a source:

Mark T. Smith and Gerald Q. Maguire Jr., SmartBadge/BadgePad version 4, 
HP Labs and Royal Institute of Technology (KTH),, date of access yyyy-mm-dd.

This version is a 12 layer printed circuit board with ball grid array (BGA) mounted SA1110 processor and SA1111 companion chip.

The first badge of this version ran was operational (without the SA1111 chip) on Saturday 03-February 2001. It immediately ran the ARM Angel debugging environment. As of 03-July 2001 it is running Linux.

Scan of the partially assembled first badge Front (without a SO-DIMM card), Front (with 32MB SO-DIMM SDRAM in place), and Back.

Finished badge photos (from Mat Hans):

The basic system consists of a Intel StrongArm-1110 processor, StrongArm-1111 coprocessor, Flash, SRAM, sensors, some built-in communication links, a SO-DIMM socket, and both PCMCIA and Compact Flash interfaces.


Parts and reason for their selection


PCMCIA (connector in place) and Compact Flash (must be connected via an adaptor to the board)

USB bus master support (Note: The USB connecter is attached to via small daughter card (USB dongle - described below), thus you can more flexibly position it in a case.)

Badge4 USB dongle

USB Dongle (front) and (back).

The external USB dongle is connected to jack JP11 -- USB Host interface via a ribbon cable. Note carefully that the connectors are on opposite sides of the cable. The dongle itself is similar to a USB Self Powered Hub. The dongle has a TI SN75240 transient voltage suppressor to provide some ESD protection and reduce the risk of damage to the SA1111. There is also a TI TPS2014 Power Distribution Switch which enables or disables the badge to supply power to the USB connector. The dongle has a USB series A Receptacle which can be used to attach it to a hub or to peripherals.

Pin out on the USB dongle, with the USB connector at the top (as shown in the "front" picture above), pin 1 will be the lower lefthand corner of the lower row:
USB dongle pinPJ11 pinoutNamePurpose
SA1111 GPIO A3
not connected at the dongle
285Vinput voltage to the TPS2014
523.3V3.3V supply
61USBH_PWR_SENConnected to the Over Current (OC-) output of TPS2014
SA1111 GPIO A4
Connected to the Enable (EN-) of TPS2014 enables/disable 5V power
SA1111 USB_Minus
USB data signalling
SA1111 USB_Plus
USB data signalling
SA1111 GPIO A2
not connected at the dongle

Badge PJ11 pinout
PJ11 pinoutNamePurpose
1USBH_PWR_SENConnected to the Over Current (OC-) output of TPS2014
23.3V3.3V supply
SA1111 GPIO A4
Connected to the Enable (EN-) of TPS2014 enables/disable 5V power
SA1111 USB_Minus
USB data signalling
SA1111 USB_Plus
USB data signalling
85Vinput voltage to the TPS2014
SA1111 GPIO A2
not connected at the dongle
SA1111 GPIO A3
not connected at the dongle

Reset switch

In order to use JTAG to program the FLASH memory you must hold down the reset switch (a small padded alligator clamp works well for this).

Battery power

With an external battery pack which output 3V or less you can easily make a battery power supply for the badge. For example, a pair of rechargable 1.2 V cells in parallel attached in series to another parallel pair will work well.

In order to be able to use the RS-232 serial interfaces you need to modify the RS-232 serial board so that you can also run it from battery power. The easiest method of doing this is to remove the LM317LZ regulator (the smaller of the two regulators on the board) and solder a wire from pin 20 of the serial ribbon cable connector (the wider cable which runs to the badge) to the middle hole where the regulator was - this will connect the 3.3V which the badge now provides via pin 20 to the MAXIM part so that it can level shift the RS-232 signals.

Pinout of JP1 is:
1UDC+serial port 0 of SA1110 - which can only used as a USB periperal
3TXD_1serial port 1
4RXD_1serial port 1
6UART_HS1aka GP13 for GPIO
7UART_HS2aka GP14 for GPIO
9NCNot Connected
10NCNot Connected
12NCNot Connected
13NCNot Connected
14NCNot Connected
15NCNot Connected
17NCNot Connected
18TXD_3serial port 3
19RXD_3serial port 3
203.3V3.3V supplied by the badge


JTAG 1149.1 connector which can be used for both debug and for in circuit programming of the FLASH memory. A second JTAG interface is used to program the CPLD (programmable logic).

A USB attached JTAG programmer (PDF) has been designed by Mark Smith. It is designed as a daughter card with a Texas Instruments TAP Master (74LVT8980A) which plugs into an ActiveWire-USB board ( This daughter card also provides an RS-232 interface (this could be used to provide the serial connection to either the ARM Angel tools or the Linux console).

Mark T. Smith's source code for controlling the TAP Master. This provides an example of how to program the Texas Instruments tap master controller. Note that this code was written to do JTAG transactions on a StrongARM SA1110 processor target; hence the relevant BSDL definitions are hard coded into it in the library source ARMPIT.C. The file "taputils_readme.pdf" within the ZIP file describes each of the other files.




Using the audio on the badge.

Other projects which might be of interest

Don Loomis, "The TINI Specification and Developer's Guide",USB Addison-Wesley, 2001, ISBN 0-201-72218-6. Describes from a user's point of view how to use the TINI environment and board which Dallas Semiconductor has developed. This system utilizes a small Java system to make it rather easy for users to develop network attached sensors and adaptors. The book is quite readable and provides an excellent series of increasingly complex examples. This is the sort of book that should exist for every environment (perhaps this will serve as an incentive for someone to write such a book for the badge(s)).

Other reading

Mat Hans's Badge4 page has links to where to get the bits for this version of the badge, a mailing list for uses of this version of the badge, etc.

Linux system development on an embedded device: Tinkering with PDAs for fun and profit by Anand K Santhanam and Vishal Kulkarni.

G.Q.Maguire Jr. (
Last modified: 27 June 2006 © 2003 M. T. Smith, HP and G. Q. Maguire Jr., KTH/IMIT

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