TEALEAF-USB-SS HEXWAX, TEALEAF-USB-SS Datasheet - Page 3

• Manufacturer Part Number: TEALEAF-USB-SS
• Description: IC, USB AUTHENTICATION KEY, SSOP-20
• Manufacturer: HEXWAX

Specifications of TEALEAF-USB-SS

• No. Of I/o's: 5
• Digital Ic Case Style: SSOP
• Supply Voltage Range: 3.3V To 5.5V
• No. Of Pins: 20
• Termination Type: SMD
• Core Size: 8 Bit
• Package / Case: 20-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Unless otherwise configured, the default value is 100mA.
Remote Wakeup
A device may be configured to implement remote
wakeup. In this mode, an interrupt pin may be used to
wake up the host. This feature requires remote wakeup
to be supported but the generic HID driver on the host,
and so performance is not guaranteed.
Custom VID / PID
Personalized Vendor and Product IDs are not required.
However, you may customize them if you wish. Unless
otherwise configured, the default Vendor ID is 0x0B40,
and the default Product ID 0x011E for the 28-pin device
and 0x011F for the 20-pin device.
Device Strings
Device strings are non-volatile Unicode strings stored by
the TEAleaf-USB and which may be read by the host
PC and all its applications. For information on how to
modify them, refer to the customization section.
Product Name
The manufacturer name is a Unicode string of up to 61
characters plus zero terminator. The host application
can read this data using a Get Feature request for string
1. The host PC commonly displays this string while it is
installing the default HID driver when it is first inserted.
Unless otherwise configured, the default value is
“TEAleaf-USB”.
Manufacturer Name
The manufacturer name is a Unicode string of up to 61
characters plus zero terminator. The host application
can read this data using a Get Feature request for string
2. The host PC commonly displays this string while it is
installing the default HID driver when it is first inserted.
Unless otherwise configured, the default value is
“Firmware Factory Ltd”.
Serial Number
The Serial Number data is a Unicode string of up to 61
characters plus zero terminator. The host application
can read this data using a Get Feature request for string
3. The Serial Number is a unique string which you can
use to differentiate one physical device from other
devices with the same TEAleaf-USB Vendor ID /
Product ID / Product GUID combination.
otherwise configured, the default value is a unique value.
Product GUID
The product GUID is a Unicode string of up to 61
characters plus zero terminator. The host application
can read this data using a Get Feature request for string
4. The product GUID is a string which you can use to
make a hardware security key specific to a particular
software application. It is used to differentiate it from
other security keys with the TEAleaf-USB Vendor ID /
Product ID combination. It should be the same for all
products of the same type. Unless otherwise configured,
the default value is “No GUID”.
p3 of 8
more than 100μA from the bus (not including the
power consumed by the TEAleaf-USB chip).
26-Aug-10
TEAleaf-USB
Unless
Config (EEPROM) String
The configuration data is a Unicode string of up to 61
(122 bytes) characters plus zero terminator. You can
use it as you wish to store configuration data on the
product which the host software can access. The host
application can read this data using a Get Feature
request for string 5. Unless otherwise configured, the
default value is “No Config”.
True Random Number Generator
The true random number generator exploits the fact that
the RC circuit in the watchdog timer is subject to
substantial drift with temperature, operating voltage, age
and quantum effects. Each random bit is generated by
running a calibrated 12MHz timer for 4ms, as measured
by the watchdog timer. At the end of this period, the
least 3 significant bits of the timer are essentially
random, being sensitive to 0.002% variations in the
watchdog timer period.
192 such random bits are generated. These are then
fed into a high-avalanche polynomial ring to derive a
192-bit random number seed. The entire process takes
250ms during power-up.
Application Circuits
The following circuits are typical implementations of the
TEAleaf-USB. Suggested component values are shown
in table 3.
Vdd
C4, C6, C7
R1, R2
LED1x
HW146-8
Label
RES1
R21
R21
R6
C7
C8
T1
C8
LED1
Vdd
Vss
Table 3. Suggested component values
TxRx Ind
C7
Vusb
TEAclipper
connector
C6
C1
12MHz resonator 0.25% tolerance
P-channel Mosfet, e.g. NDS352P
TEAleaf-USB
1
Figure 2
2
R2
3
4
Light emitting diode
5
100nF capacitor
470nF capacitor
470R resistor
1uF capacitor
Component
22k resistor
1k resistor
Vss
www.firmwarefactory.com
OSC2
OSC1
D+
D-
RES1
Vdd
Vss
Vss
4
3
2
1
USB