USB-I2C-DIL HEXWAX, USB-I2C-DIL Datasheet - Page 8

• Manufacturer Part Number: USB-I2C-DIL
• Description: IC, USB TO SERIAL I2C INTERFACE, DIP-28
• Manufacturer: HEXWAX

Specifications of USB-I2C-DIL

• Supply Voltage Range: 1.8V To 5V
• Digital Ic Case Style: DIP
• No. Of Pins: 28
• Termination Type: DIP
• Package / Case: 28-DIP
• Filter Terminals: DIP
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Customization
The product can be customized in one of three ways:
Delivery and Programming
USB-I2C is available pre-programmed in 28-pin DIL and
20-pin SSOP packages. USB-I2C-SS (SSOP package)
may be supplied with an ID label, or it may be identified
with a blue mark on the package.
In high volumes (5K+), USB-I2C is available reeled with
your custom settings preloaded, in any available
package.
TEAclipper Programming
If practical, a TEAclipper programming socket should be
added to the circuit board in order to facilitate in-circuit
firmware updates.
During programming, these connections must be
protected against contention.
Vpp is subject to 13V during programming. Nothing else
should be connected to Vpp except via a 22k pull-up
resistor.
The TEAclipper connector format is shown in figure 9.
Since the programming time is fast, no programming
socket is required.
against the plate-through holes shown.
p8 of 9
1.
2.
3.
Using the HIDconfig.exe application (figure 8) in
the development kit. This application makes it
very easy to copy the configuration from an
existing product to a new product and is suitable
for in-factory use. (It cannot be used if you have
changed the Vendor ID and / Product ID.)
By requesting the custom settings to be supplied
pre-programmed when buying pre-programmed
chips (5K units minimum).
Using customization commands. Documentation
on these commands is available on request.
Figure 8. HIDconfig.exe application
The TEAclipper can be ‘leaned’
26-Aug-10
In particular, note that
USB-SPI
It is strongly recommended that this connector is
included in circuits even if in-circuit programming is not
anticipated, since this allows you to upgrade the
firmware if necessary.
Evaluation Board
USB-I2C may be evaluated with the Firmware Factory
USB Products Eval Board (figure 10). The components
which must be fitted are shown in table 5. In addition,
the following connections must be made:
The prototyping area on the left of the board may be
used to add the LED and pushbutton. In figure 11, an
active low LED has been connected to the AllSysGo#
pin and active high LEDs to the Tx and Rx indicators,
and a jumper provided on the Send input.
connections are on the underside of the board.)
The printed circuit board integrates an edge connector
of USB Type A format. This may be plugged into a USB
extension cable.
The PIC18F2331 serves as an I2C master for the
evaluation. When the pushbutton is pressed, the LED
lights. Eight bytes are then sent to USB-I2C and eight
bytes are read from USB-I2C. The first time the button
is pressed, the bytes 12 34 56 78 9A BC DE F0 are sent.
Thereafter, the previously received eight bytes are
echoed back. The source code for the I2C host is in the
development kit.
Pin 1 indicated
by square pad
Figure 9. Recommended plate-through connector design
C4d, C6
- Jumper A to Jumper C.
- Active low LED to pin 3 (RA1) pf U7.
- Active high pushbutton to pin 4 (RA2) pf U7.
- Pin VIO9 / Send to Vdd.
- Jumper J to Jumper K (20 pin device only)
- Jumper L to Jumper M (20 pin device only)
C2, C3
R2, R3
R4, R5
Label
U2
U7
D2
C7
C8
X1
Table 5. Evaluation Board bill of materials
HW144-8
12MHz parallel cut crystal
2.54mm spacing
100nF capacitor
470nF capacitor
10uF capacitor
22pF capacitor
USB-I2C-DIL
PIC18F2321
Component
22k resistor
4k7 resistor
Wire link
www.hexwax.com
1mm hole dia
(Some