TEALEAF-USB HEXWAX, TEALEAF-USB Datasheet - Page 7

• Manufacturer Part Number: TEALEAF-USB
• Description: TEAleaf-USB Authentication System
• Manufacturer: HEXWAX

Specifications of TEALEAF-USB

• Silicon Manufacturer: FirmWare Factory
• Kit Application Type: Communication & Networking
• Application Sub Type: USB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Design Blueprint
A design blueprint comprised of schematic diagram, bill
of materials, PCB Gerbers and component placement is
available.
required.)
The design is intended for step-and-repeat on PCB
panels. To facilitate in-circuit programming, PGC and
PGD are connected to D+ and D- USB pins respectively.
Access to Vpp is provided via a copper pad which can
be connected to using a crocodile clip.
Individual circuits are V-scored. After breaking apart,
the non-routed section should be labeled and then
dipped in varnish to add robustness and electrical
isolation. This enclosure-less design works well with the
low profile components specified; LEDs have not been
used as they would be liable to break off.
The gold plating on the USB connector should last for
50 insertions; before cleaning of the contacts will be
required.
Evaluation Board
TEAleaf-USB may be evaluated with the Firmware
Factory USB Products Eval Board (figure 7).
components which should be fitted are shown in table 6.
The printed circuit board integrates a USB plug which
may be plugged into a USB extension cable.
When connected as described, the LEDs will light for
All-Systems-Go, Tx, Rx, and Authenticated conditions.
The HIDconfig.exe application can be used to discover
and test the evaluation device.
p7 of 8
2.
3.
Label
U2
D2
C4
C7
Table 6. Evaluation Board bill of materials
By requesting the custom settings to be
supplied pre-programmed when buying pre-
programmed chips (5K units minimum).
Using
Documentation
available on request.
(A signed nondisclosure agreement is
26-Aug-10
Fig 6. Hidconfig.exe application
customization
on
TEAleaf-USB-DIL
100nF capacitor
10uF capacitor
Component
these
Wire link
commands
TEAleaf-USB
commands.
The
is
Firmware Delivery
TEAleaf-USB is available pre-programmed in 28-pin DIL
and 20-pin SSOP packages. TEAleaf-USB-SS (SSOP
package) may be supplied with an ID label, or it may be
identified with a white mark on the package. It is also
available as a fully assembled device according to the
design blueprint.
Programming TEAleaf-USB
If practical, a TEAclipper programming socket should be
added to the circuit board in order to facilitate in-circuit
firmware updates.
TEAleaf-USB may be programmed in-circuit provided
the programming signals PGC, PGD and Vpp are
protected against contention. In particular, note that the
Vpp line is subject to a voltage of up to 13V during
programming. Nothing else should be connected to this
input except a 22k pull-up resistor.
Since the programming time is fast, no programming
socket is required for the TEAclipper. It may be leaned
against five plate-through holes as described in figure 8.
In-circuit programming connections of some form should
always be provided, even if the device is supplied pre-
loaded, in order to facilitate firmware upgrades.
Pin 1 indicated
by square pad
LED1-3, LED5
Figure 8. Recommended plate-through connector design
R13-15, R18
C2, C3
HW146-8
Label
W1
W2
W3
W4
C8
R2
X1
Table 6. Evaluation Board bill of materials
Fig 7. USB Products Eval Board
470R resistor – adjust for LED brightness
Wire link from ASG# (pin 6) to LED5
Wire link from Auth (pin 18) to LED1
Wire link from Rx (pin 23) to LED2
Wire link from Tx (pin 7) to LED3
12MHz parallel cut crystal
Light emitting diode 5mm
470nF capacitor
22pF capacitor
2.54mm spacing
Component
22k resistor
www.firmwarefactory.com
1mm hole dia