123 Comstock Drive
Milford, NH 03055-3513
Tel: 603 672-5011
Fax: 603 672-5044
Email: consulting@bartek.com
Web: http://www.bartek.com
The PTB-X circuit bread boardin g platform is an expanded and enhanced version of its
predecessor, (PTB1-XF), with twice the available bread-boarding area and additional connectivity
that includes full access to the Microchip PICtail® bus. Although this board i s mainly intended to
work with the Explorer 16 and PIC-32 Expansion development boards, it will also work as a
stand-alone development platform that can be powered from the on-board USB serial interface .
Features:
Breadboard prototyping area is no w twice the size (6.5" X 4.25") with 1660 tie points.
Expanded legends on PICtail® bus to accomm odate PIC32 I/O. Connectivity is now
distributed along each sid e of the proto board area with access to all 120 I/O point plus
various supplies.
Power indicator LED’s for 3.3V and 5V supplies.
Auxiliary USB to Serial port using MCP2200 interface with five configurable I/O chann els.
May be directly connected to UART1 of PIC controller or may be used in a stand-alone
mode.
TX & RX LED indicators for serial channel activity.
2.5V Voltage reference with +/- 1% accuracy available on po wer distribution headers.
Charge-pump DC-DC inverter provid es selectable -3.3V or -5V for analog applica t ions
requiring a negative rail.
Board may be powered from host development board or from USB powe r. While on USB
power both 3.3V and 5V are available to the user.
Four tactile N.O. momentary switches easily connecte d via headers.
DB9 connector footpri nt and 10 pin access header for external connectivity such as CAN
or other serial interface.
Includes a 70-piece wire jumper kit and USB mini-B cable.
Board dimensions are 6” X 10” (15.24 X 25.40 cm).
Model PTB-X and included accessories
PTB-X board shown with PIC32 Expansion Board and Explorer 16
Detailed Board Features
1,2. PICtail® Bus access and power distribution header connectors.
3. Bread boarding area with1660 tie points.
4. PICtail® Bus connector.
5. Power distribution header (1 of 4) with: 3.3V, 5V, -Vee, 2.5Vref and GND.
6. LED Power indicators for 3.3V and 5V.
7. Negative power rail –Vee voltage selector for -3.3V or -5V.
8. USB TX and RX data LED indicators.
9. USB to serial port.
10. USB serial access and conf iguration to UART1 on development boards.
11. Optional 9-pin DB9 connector and access header.
12. Four momentary NO switches.
13. On-board 3.3V regulator for USB power.
14. 2.5V voltage reference.
15,16. Access headers for USB I/O ports and momentary switches.
Operating Information:
The PTB-X board can operate on both as an extension of a Microchip development board that
supports the 120 pin PICtail® bus or it may operate as a stand-alone board.
When operating while plugged into a board like the Explorer 16 or PIC-32 Expansion board the
3.3Vdc, 5.0Vdc, and 9Vdc power supplies will be available through the power distributio n
connectors. A visual indication for both the 3.3Vdc and 5.0Vdc power will be shown via two
LED’s.
The board may be utilized as a stand-alone prototyping platform without the above boards and
used with an external power supply fed directly onto the breadboard area. If desired you may
connect an external 3.3Vdc to the power distribution connector labeled “+3.3V”. The same
applies to the +5Vdc line. MAKE SURE CORRECT POLARITY IS OBSERVED. Wiring the 5Vdc
to the 3.3V line, or reversing the power supply polarity while connecting to the power distribution
connector, may damage components on this board. The board can also be powered from the
USB power by connecting the “5VUSB” with a jumper to +5V. A 3.3Vdc regulator is also available
and its output is located on the “3.3VUSB ” wiring point. While operating from the USB bus power
both 3.3Vdc and 5Vdc are available at all times.
Caution should be taken while using the USB power not to connect either the “5VUSB” or
“3.3VUSB” to the “+3.3V” or “+5V” power distribution connector while PTB-X board is co nnected
to a Microchip development board. This could possibly damage the Microchip development
board. DO NOT USE USB POWER CONNECTIONS WHILE CONNECTED TO ANOTHER
DEVELOPMENT BOARD.
Auxiliary USB Port:
The USB interface is provided via a MCP2200 serial interface creating a secondary virtual
communications port that may be tied directly to the UART1 on the development boards with or
without full handshake control lines. Both the USB Txd and Rxd lines are isolated from the
development board UART by jumping the two ce nter pins of J8. This mode acts as a “loopback”
mode that can be useful to test the USB serial port. If the “Handshake”, (CTS, RTS), lines are
used the same can be done for J11. (See figure below).
If you need to connect the USB serial port to the UART1 then the two jumpers should be placed
as shown in the figure below. This also shows the full use of the handshake lines. If no
handshake is required then J11 can be left empty.
A visual status of the USB transmit, (USBTXD), and receive lines, (USBRXD), is provide d via two
colored LED’s. While o n “loop-back” mode every character sent via the USB comm port will flash
both of these LED’s.
The AUX-USB distribution connector co ntains the b re ak out of all the lines from the MCP2200
including six additional I/O ports that may be utilized throu gh the USB connection via the above
device. In order to utilize the I/O ports, handshake control lines, and activate the USB-TXD and
USB-RXD LED’s, you must use the MCP2200 Configu ration Utility Setup.exe located in the folder
“Configuration Utility” a sub-folder of MCP2200 Drivers and Utilities located in the CD-ROM.
Additionally, you must install the appropriate USB driver support for your respective OS. This
information is available in the Drivers and Utilities folder. For additional information please go to:
http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1406&dDocName
=en547372
Negative –VEE Supply
The negative –VEE supply is provided from a capacitive charge pump (U1). This device can
supply both -3.3Vdc and -5.0Vdc depending o n the J5 jumper selection. (See figure below).
Jumper set up for –VEE = -5V Jumper set up for –VEE = -3.3V
This negative rail is there mainly for low power analog circuitry and may not be capable of
sourcing high currents. Due to the nature of the DC Inverter charge pump only a limited amount
of current is available for the –VEE supply. If the user requires currents of 50 mA or higher it is
advisable to install a second charge pump device acting in parallel with U1. A SOT23-5 device
(U2) such as the TPS60403 and two ca pacitors (C3 and C13) may be installed. Another option
for high –VEE current is to replace U1 with a TC1121COA, (and jump J21), which can supply up
to 100 mA.
Momentary NO Switches
Four momentary normally open switches are provided and are accessible via the eight position
header depicted as “SWITCHES”.
Optional 9-Pin DB9 Conn ector:
An optional DB9 connector, (not installed), is accessible via J13, (not installed), a 10 pin female
header to provide external connectivity if required.
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
USB
RS-232 PORT1 (Optional)
Jumper J11 1-2 (If RTS requi red)
Jumper J11 3-4 (If CTS requi red)
Jumper J8 1-2 and 3-4
-VEE SELECTOR
J5 1-2 jumper ed -VEE = -3V
J5 2-3 jumper ed -VEE = -5V
*Optional(not Installed)
*Optional(not Installed)
NOTE:
U1 or U2 may be installed, if U1 is
installed: U2,C3 and C13 are left out.
Conversely: U1,C14 and C10 are left out.
Only us ed U1= TC1121
*Optional, includes C3 and C13
Normally open when
U1 = TC1044
Bartek Technologies
Milford, NH 03055
USBRXD
USBTXD
USBRTS
USBCTS
RD14 (CTS1)
RD15 (RTS1)
RF2 (RXD1)
RF3 (TXD1)
5V
3.3V
GND_POWER
2.5Vref
5VUSB
USBGP0
USBGP1
USBGP2
USBCTS
USBRXD
USBRTS
USBTXD
USBGP3
USBGP4
USBGP5
SW2B
SW3A SW3B
SW1A SW1B
SW2A
SW4A SW4B
3.3VUSB
5VUSB
5VUSB
5VUSB
5V3.3V
-VEE
5V
5VUSB 3.3VUSB
5V
3.3V
3.3V 5V5VUSB
Title
Size Document Number Rev
Date: Sheet of
PTBX072711
1
PTB-X Schematic
B
12Wednesday, July 27, 2011
Title
Size Document Number Rev
Date: Sheet of
PTBX072711
1
PTB-X Schematic
B
12Wednesday, July 27, 2011
Title
Size Document Number Rev
Date: Sheet of
PTBX072711
1
PTB-X Schematic
B
12Wednesday, July 27, 2011
C13
1uF
C14
10uF
C9
10uF
R5
10.0K
J15
CONNECTOR DB9 (female)
5
9
4
8
3
7
2
6
1
R4
270
SW2
SW PUSHBUTTON
C6
100nF
U1
TC1044S
FB/SD
1
CAP+
2
GND
3
CAP-
4
+V 8
VREF 6
VOUT 5
OSC 7
C8 470nF
C1
10uF
SW4
SW PUSHBUTTON
C2
10uF
C12
100nF
SW3
SW PUSHBUTTON
J8
HEADER 4 (Male)
1
2
3
4
J11
HEADER 4 (Male)
1
2
3
4
U2
TPS6043
CAP+
5
GND
4
CAP-
3
+Vin 2
VOUT 1
LED3
LED-GREEN
2 1
U3
MCP1525
VIN
1VOUT 3
VSS
2
R6
470
LED4
LED-RED
2 1
Y1
12.00MHz
C5
10uF
SW1
SW PUSHBUTTON
C7
100nF
C11
100nF
R3
270
R2
270
R1
270
J9
USB-MINI-B-CON
1
2
3
4
5
U5
MCP2200
VDD
1
OSC1
2
OSC2
3
RST
4
GP7/Tx-LED
5
GP6-Rx-LED
6
GP5
7
GP4
8
GP3
9
TXD
10 RTS 11
RXD 12
CTS 13
GP2 14
GP1/USBCFG 15
GP0/SSPND 16
Vusb 17
D- 18
D+ 19
VSS 20
LED2
LED-RED
2 1
J21
HEADER 2
1
2
LED1
LED-RED
2 1
U4
AP117E33GDI
IN
3OUT 2
GND
1
J13
HEADER 8
1
2
3
4
5
6
7
8
J5
HEADER 3 (Male)
1
2
3
C4
100nF
C3
1uF
C11
100nF
J20
HEADER 3 (Male)
1
2
3
FB1
FERRITE BEAD
1 2
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
EDGE CONNECTOR
BREADBOARD AREA
ACCESS CONNECTORS TO PICTAIL BUS
ACCESS CONNECTORS TO PICTAIL BUS
EXTERNAL I/O ACCESS
Bartek Technologies
Milford, NH 03055
RF2
RF3
RG2
RG3
GND_POWER
RB1
RB4
GND_POWER
RE8
RD15
RF0
RF1
RF4
RF5
RA2
RA3
GND_POWER
RA10
GND_POWER
RA14
RF13
RG0
RG1
RG13
RG14
RA1
RA5
RA7
RB7
/MCLR
RB11
RB13
RB15
RC2
RC4
RC14
P92
RD1
RD3
RD5
RD7
RD9
RD11
RD13
RE1
RE3
RE5
RE7
P118
GND_POWER
P61
RG15
RA0
RA6
RB5
RB12
RC1
RC13
RD0
RD4
RD8
RD12
RE0
RE4
P117
RG12
RA4
RB6
RB10
RB14
RC3
P91
RD2
RD6
RD10
RE2
RE6
RF2
RG2
RB4
RE8
RF1
RF4
RA2
RA10
RA14
RF3
RG3
RB1
RD15
RF0
RF5
RA3
RB9
RF13
RG0
RB2
RF6
RF7
RF8
GND_POWER
RB0
RB3
GND_POWER
RE9
RD14
RG0
RG1
RG9
RG6
RG7
RG8
GND_POWER
RB8
RA9
GND_POWER
RA15
RF12
P59
P61
RG15
RG12
RA0
RA4
RA6
RB6
RB5
RB10
RB12
RB14
RC1
RC3
RC13
P91
RD0
RD2
RD4
RD6
RD8
RD10
RD12
RE0
RE2
RE4
RE6
P117
GND_POWER
RB9
GND_POWER
GND_POWER
GND_POWER
GND_POWER
RB2
RF7
RB3
RE9
RG1
RG9
RG7
RA9
RA15
RF6
RF8
RB0
RD14
RG0
RG6
RG8
RB8
RF12
P59
GND_POWER
RG1
RG13
RA1
RA7
/MCLR
RB13
RC2
RC14
RD1
RD5
RD9
RD13
RE1
RE5
P118
RG14
RA5
RB7
RB11
RB15
RC4
P92
RD3
RD7
RD11
RE3
RE7
5V
3.3V
GND_POWER
9V
2.5Vref
5VUSB
USBTXD
USBGP3
USBGP4
USBGP5
USBGP0
USBGP1
USBGP2
USBCTS
USBRXD
USBRTS
SW2B
SW3A
SW3B
SW1A
SW1B
SW2A
SW4A
SW4B
3.3VUSB
3.3V
3.3V 5V
9V
3.3V
5V
9V
3.3V
5V
9V
9V
3.3V
5V
3.3V
3.3V
5V
9V
3.3V
3.3V 9V
5V
9V3.3V
5V
9V3.3V
5V
9V3.3V
5V
3.3V 5V -VEE 2.5Vref
3.3V 5V -VEE
2.5Vref
2.5Vref
3.3V
5V
9V 3.3V
5V
9V
3.3V
Title
Size Document Number Rev
Date: Sheet of
PTBX072711
1
PTB-X Schematic / Connector Wiring
B
22Wednesday, July 27, 2011
Title
Size Document Number Rev
Date: Sheet of
PTBX072711
1
PTB-X Schematic / Connector Wiring
B
22Wednesday, July 27, 2011
Title
Size Document Number Rev
Date: Sheet of
PTBX072711
1
PTB-X Schematic / Connector Wiring
B
22Wednesday, July 27, 2011
J19 HEADER 30
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
J13
HEADER 5
1
2
3
4
5
J3 HEADER 30
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
J1
HEADER 5
1
2
3
4
5
J2 HEADER 30
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
J16
HEADER 5
1
2
3
4
5
J18 HEADER 30
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
J30A
EDGE CON120
1 2
3 4
5 6
7 8
910
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 34
35 36
37 38
39 40
41 42
43 44
45 46
47 48
49 50
51 52
53 54
55 56
57 58
59 60
61 62
63 64
65 66
67 68
69 70
71 72
73 74
75 76
77 78
79 80
81 82
83 84
85 86
87 88
89 90
91 92
93 94
95 96
97 98
99 100
101 102
103 104
105 106
107 108
109 110
111 112
113 114
115 116
117 118
119 120
J6
HEADER 14
1
2
3
4
5
6
7
8
9
10
11
12
13
14
J14
HEADER 8
1
2
3
4
5
6
7
8
J4
HEADER 5
1
2
3
4
5
