Download BV500 PCB Kit BV500T BV500T PCB for the BV500 IC

ByVac
Product Specification
BV500 PCB Kit
BV500T
BV500T
PCB for the BV500 IC
Product specification
©ByVac
Dec 2012 V0.a
Page 1 of 5
ByVac
Product Specification
BV500 PCB Kit
BV500T
Contents
1.
Introduction ................................................................................................................3
2.
Features .....................................................................................................................3
3.
Construction ...............................................................................................................3
3.1.
4.
Component List .......................................................................................................3
Serial Interface............................................................................................................3
4.1.
5.
DTR .......................................................................................................................3
Example Use ...............................................................................................................3
5.1.
AVSS & AVDD .........................................................................................................4
5.2.
Stand Alone ............................................................................................................4
6.
Circuit Diagram ...........................................................................................................5
7.
PCB Layout .................................................................................................................5
8.
Pin Connections ...........................................................................................................5
©ByVac
Page 2 of 5
ByVac
Product Specification
BV500 PCB Kit
BV500T
Rev
Change
December
2012
Preliminary
C4 the right way round. The white stripe is
the negative, the longer lead goes to the +
side.
1. Introduction
This is a carrier PCB with small prototyping
area for the Microchip PIC32MX1 IC. It has a
3.3V regulator and so can be used with a 5V
supply.
2. Features
•
•
•
•
•
Up to 6V input
Prototyping area
For use with ByPIC operating system
Separate serial socket
Size 82 x 25mm
Some of the pads are connected to the ground
plane and will be more difficult to solder, a
larger amount of heat is needed for these
pads.
4. Serial Interface
The serial connection is designed for a type 3
USB to serial device that simply plugs into the
right angled female socket. The pins are
correct. The 5V output is used to power the
device not the 3v3 output as this PCB has a
built in voltage regulator.
Any other USB to serial device can of course
be used but the pins are likely to be different
and so some wiring will be needed.
3. Construction
This is a double sided PCB that can be
supplied with or without the components. It is
a good idea to socket the IC but not absolutely
necessary.
3.1. Component List
Part
Value
R1
100k
1/4W
C1,2,5,6
0.1uF
6V or more
C3,4
10uF
6V or more
IC1
PIC32
MX150F128B
ByPIC
IC2
MCP1700
3.3V
regulator
S1
6 way RA
Female
socket
S2
28 way
socket
IC
Narrow
J1,2,3,4
2.54mm
head
Pin
8 way
text]
PCB
BV500T_c
4.1. DTR
If using BV_COM2, conveniently the DTR
output is connected to the icon with the arrow
on it. This will momentarily bring DTR low and
makes a very useful reset. To implement this
connect the DTR output to pin 8 on J3 (see the
circuit diagram)
5. Example Use
[see
IMPORTANT NOTES:
1.
The regulator is MCP type and is not
pin compatible with the 78L variety
2.
The 6 way connector can be mounted
on the underside of the board, this
way it will not obscure the text on the
top side.
3.
The serial connector can fit on the underside
of the PCB
All of the available pins (except AVSS and
AVDD which have their own pins) are brought
out to connectors J1, J2 and J3. Pin 1 for each
connector has a square pad, with the serial on
the left, pin1 will be the top most pin. This
means that port RB0 to RB7 will be on
connector J1.
The PCB is designed to have 4 pin head
connectors in rows J1 to J4. DuPont leads can
be used to connect to other equipment.
As an alternative turned pin sockets can be
used, these are ideal for use with telephone
wire as a hook up to breadboard.
The Pinhead connector is supplied as
a 40 way strip, this can be snapped
to length and will leave 8 spare.
Install the IC socket first followed by the other
components. Make sure that you get C3 and
©ByVac
Page 3 of 5
ByVac
Product Specification
BV500 PCB Kit
BV500T
5.1. AVSS & AVDD
The AVDD and AVSS are permanently
connected to 3.3V and ground respectively by
a shorting track underneath the jumpers. If a
separate analogue supply is required then this
track can be broken and the PCB pad used.
The short is not shown on the circuit diagram.
5.2. Stand Alone
The main reason for supplying a 3.3V
regulator is that the board, one programmed
can be used as a stand alone device with
perhaps a battery power supply.
©ByVac
Page 4 of 5
ByVac
Product Specification
BV500 PCB Kit
BV500T
6. Circuit Diagram
7. PCB Layout
8. Pin Connections
©ByVac
Page 5 of 5