http://www.nslu2-linux.org/albums/34pin_universal_connector/NSLU2_34_way_header_1.sized.jpg http://www.nslu2-linux.org/albums/34pin_universal_connector/NSLU2_34_way_header_2.jpg

http://www.nslu2-linux.org/albums/34pin_universal_connector/NSLU2_34_way_header_4.jpg

http://www.nslu2-linux.org/albums/34pin_universal_connector/NSLU2_34_way_header_3.jpg

http://www.nslu2-linux.org/albums/34pin_universal_connector/NSLU2_34_way_header_8.sized.jpg

http://www.nslu2-linux.org/albums/34pin_universal_connector/NSLU2_34_way_header_9.sized.jpg

http://www.nslu2-linux.org/albums/34pin_universal_connector/NSLU2_34_way_header_7.sized.jpg

http://www.nslu2-linux.org/albums/34pin_universal_connector/NSLU2_34_way_header_10.jpg

http://www.nslu2-linux.org/albums/34pin_universal_connector/NSLU2_34_way_header_5.jpg http://www.nslu2-linux.org/albums/34pin_universal_connector/NSLU2_34_way_header_6.jpg

Note that pins 25 and 26 are not usable when a dual-in-line IDC female plug is used for the serial and I2C ports.\\

And here is the hole I cut in the case. I only made the hole big enough to get to pins 15 through 34 - I figured that if I broke my slug bad enough to require JTAG, then I can just take the PCB out of the case to fix it.

Note that pins 2, 4, 6, 8, 10, 12, 13 and 14 are not useable when a Digilent JTAG3 cable is used for the JTAG port.

And here is the hole I cut in the case. I only made the hole big enough to get to pins 15 through 34 - I figured that if I broke my slug bad enough to require JTAG?, then I can just take the PCB out of the case to fix it.

And here is the hole I cut in the case. I only made the hole big enough to get to pins 15 through 34 - I figured that if I bricked my slug bad enough to require DefJTAG JTAG?, then I can just take the PCB out of the case to fix it.

Note that pins 2, 4, 6, 8, 10, 12, 13 and 14 are not useable when a Digilient JTAG3 cable is used for the DefJTAG JTAG? port.

And here is the hole I cut in the case. I only made the hole big enough to get to pins 15 through 34 - I figured that if I bricked my slug bad enough to require JTAG, then I can just take the PCB out of the case to fix it.

Here is the pinout of the 34-way connector:

Note that pins 2, 4, 6, 8, 10, 12, 13 and 14 are not useable when a Digilient JTAG3 cable is used for the JTAG port.

Note that pins 25 and 26 are not useable when a dual-in-line IDC female plug is used for the serial and I2C ports.
Note that the +5V pin is near the USB Device area, but should not normally be connected for self-powered USB Device like the NSLU2.
Note that pin 21 is left unconnected to allow a four pin header for the USB to be plugged in without connecting to the +5V pin.

Here are the pinouts of the individual interfaces:

The curly wire is the spare signal connected to pin 21.

A couple of the signals had to be soldered underneath the cable on the front, cause I initially made a mistake and had the pinout of the connector reversed. Luckily I had only soldered 10 wires by that stage, but by the time I realised the mistake I had already cut these two wires too short to take them over to D5 and D6 where I originally intended to pick up pins 9 and 11.

I have worked out how to put a 34-pin IDC male header on the inside of the small flat side of the slug (where the FCC compliance label is, in fact - specifically where the words "This device ... may cause undesired operations" are) and connect all the additional interfaces up to it.

There is space on the PCB for a upside-down (the pins which normally go through the PCB will be sticking up) right-angle PCB-mount male header to be glued on the empty slice of PCB between the resistors and the edge of the PCB, from C45 to the power plug, clearing L2 (the coil) by removing some of the pins from the 34-pin male header. Some other pins are removed from the 34-pin male header to indicate keying of different interfaces (these pins would be otherwise unusable when my preferred connectors are plugged in). The 34-pin header is glued to the board, not the case, so you are still be able to remove the board from the case (the header comes out with the board).

Note that you have to notch out the top of the internal PCB mount to allow the header to take that space. The bottom slug is the modified one.

A 34-pin female cable mount is plugged into the pins that are sticking up, and from there, the ribbon cable connected to the 34-pin female cable mount splays out to the respective connection points.

Here are the pinouts ...

Here are the pictures of the finished product ...

Note that you have to notch out the top of the internal PCB mount to allow the header to take that space.

A 34-pin female cable mount will be plugged into the pins that are sticking up, and from there, the ribbon cable connected to the 34-pin female cable mount will splay out to the respective connection points.

The various interfaces have been arranged so that the ribbon cable splits into three main areas (connections to the south of the front of the PCB, connections to the north-west of the rear of the PCB, and connections to the south-east of the rear of the PCB).

Note that pins 13 and 14 are not useable when a Digilient JTAG3 cable is used for the JTAG port.

Note that pins 25 and 26 are not useable when a dual-in-line IDC female plug is used for the serial and I2C ports.\\

Note that pin 21 is left unconnected to allow a four pin header for the USB to be plugged in without connecting to the +5V pin.

Here are the pictures of the finished product ...

Note that pins 2, 4, 6, 8, 10, 12, 13 and 14 are not useable when a Digilient JTAG3 cable is used for the JTAG port.

Here are the obligatory pictures:

NSLU2-34-way-header-1.jpg NSLU2-34-way-header-2.jpg NSLU2-34-way-header-3.jpg NSLU2-34-way-header-4.jpg NSLU2-34-way-header-5.jpg NSLU2-34-way-header-6.jpg NSLU2-34-way-header-7.jpg NSLU2-34-way-header-8.jpg NSLU2-34-way-header-9.jpg

Note that the +5V pin is near the USB Device area, but should not normally be connected for self-powered USB Device like the NSLU2.
Note that pin 22 is left unconnected to allow a four pin header for the USB to be plugged in without connecting to the +5V pin.

Note that the +5V pin is near the USB Device area, but should not normally be connected for self-powered USB Device like the NSLU2 - hence pin 22 is left unconnected to allow a four pin header for the USB to be plugged in without connecting to the +5V pin.

Note that the +5V pin is near the USB Device area, but should not normally be connected for self-powered USB Device like the NSLU2 - hence pin 22 is left unconnected to remove the possibility for error.

There is space on the PCB for a upside-down (the pins which normally go through the PCB will be sticking up) right-angle PCB-mount male header to be glued on the empty slice of PCB between the resistors and the edge of the PCB, from C45 to the power plug, clearing L2 (the coil) by removing some of the pins from the 34-pin male header. The 34-pin header will be glued to the board, not the case, so I will still be able to remove the board from the case (the header will come out with the board). Some other pins are removed from the 34-pin male header to indicate keying of different interfaces (these pins would be otherwise unusable when my preferred connectors are plugged in).

A 34-pin female cable mount will be plugged into the pins that are sticking up, and from there, the ribbon cable connected to the 34-pin female cable mount will splay out to the respective connection points. The various interfaces have been arranged so that the ribbon cable splits into three main areas (connections to the south of the front of the PCB, connections to the north-west of the rear of the PCB, and connections to the south-east of the rear of the PCB).

Note that pins 26 and 25 are not useable when a dual-in-line IDC female plug is used for the serial and I2C ports.
Note that pins 14 and 13 are not useable when a Digilient JTAG3 cable is used for the JTAG port.
Note that the +5V pin is allocated to the USB Device area, but should not be connected to a USB Host (as the host supplies any power).

Note that pins 26 and 25 are not useable when a dual-in-line IDC female plug is used for the serial and I2C ports.

Note that pins 26 and 25 are not useable when a dual-in-line IDC female plug is used for the two serial ports.

Note that pins 14 and 13 are not useable when a Digilient JTAG3 cable is used for the JTAG port.

There is space on the PCB for a right-angle PCB-mount male header to be glued on the empty slice of PCB between the resistors and the edge of the PCB, from C45 to the power plug, clearing L2 (the coil) by removing some of the pins from the 34-pin male header. The 34-pin header will be glued to the board, not the case, so I will still be able to remove the board from the case (the header will come out with the board). Some other pins are removed from the 34-pin male header to indicate keying of different interfaces (these pins would be unusable when my preferred connectors are plugged in).

Serial 1:

I2C (standard Philips pinout):

Serial 1 (NSLU2 J2 pinout, with TXD output replaced by CTS_N input, and allowing the power to be toggled by grounding pin 1):

Note that pins 21 and 22 are not useable when a Digilient JTAG3? cable is used for the JTAG port.

Note that pins 9 and 10 are not useable when a dual-in-line IDC female plug is used for the two serial ports.

Note that pins 21 and 22 are not useable when the Digilient JTAG connector is plugged in.

34-pin connector pinout:

Note that pins 21, 22, 23, 25, 27, 29, 31, and 33 are not useable when the Digilient JTAG connector is plugged in.

Note that pins 9 and 10 are not useable when a dual-in-line IDC connector is plugged in for the two serial ports.

Serial 0 (NSLU2 J2 pinout):

Serial 1 (NSLU2 J2 pinout, with TXD output replaced by CTS_N input):

I2C? (standard Philips pinout):

JTAG (Digilent JTAG3? Cable pinout):

USB Device Type-B Socket:

USB Device:

This connector is compatible with the J2 on-board serial connector.

This connector is compatible with the J2 on-board serial connector, with the exception of the RTS_N signal (an input) which replaces the TXD signal (an output).

From there, the ribbon cable connected to the 34-pin female cable mount will splay out to the respective connection points.

Serial 0:

Serial 1:

Serial:

I2C?:

JTAG:

The pinout of the connector is be designed to allow the Digilent JTAG cable on six pins (with a corresponding set of 6 removed pins next to it). It can also support either the CompSys serial kit, or the USB-Serial solution.

I have a plan to put a 34-pin IDC male header on the inside of the small flat side of the slug (where the FCC compliance label is, in fact - specifically where the words "This device ... may cause undesired operations" are).

There is space on the PCB for a right-angle PCB-mount male header to be glued on the empty slice of PCB between the resistors and the edge of the PCB, from C45 to the power plug, clearing L2 (the coil) by removing some of the pins from the 34-pin male header. The 34-pin header will be glued to the board, not the case, so I will still be able to remove the board from the case (the header will come out with the board).

I will put the right-angle PCB-mount male header in upside-down, so the pins which normally go through the PCB are now sticking up, just ready for a 34-pin female cable mount to be plugged into it.

The pinout of the connector will be designed to allow the Digilent JTAG cable on six pins (with a corresponding set of 6 removed pins next to it), then a spare pin (for TRST_N), then some spare pins, then four pins for the serial port (allocated to support either the CompSys? kit, or the USB-Serial solution). That's one row.

The other row will be taken up by the second receive only serial port (2 pins), the usb 1.1 port (3 pins, including power), the I2C? port (2 pins), and the reset button (1 pin), and maybe a signal to cycle the power remotely (1 pin). That leaves one pin spare for the thing that I forgot.

I have a plan to put a 34-pin IDC male header on the small flat side of the slug (where the FCC compliance label is, in fact - specifically where the words "This device ... may cause undesired operations" are).

There is space on the PCB for a right-angle PCB-mount male header to be glued on the empty slice of PCB between the resistors and the edge of the PCB, from C45 to the power plug, clearing L2 (the coil) by removing some of the pins from the 34-pin male header

But I will put the right-angle PCB-mount male header in upside-down, so the pins which normally go through the PCB are now sticking up, just ready for a 34-pin female cable mount to be plugged into it.

From there, the ribbon cable connected to the 34-pin female cable mount will splay out to the serial port, the jtag port, and anything else I care to connect to it.

The pinout of the connector will be designed to allow the Digilent JTAG cable on six pins (with a corresponding set of 6 removed pins next to it), then a spare pin (for TRST_N), then some spare pins, then four pins for the serial port. That's one row. The other row will be taken up by the second receive only serial port (2 pins), the usb 1.1 port (3 pins, including power), the I2C? port (2 pins), and the reset button (1 pin), and maybe a signal to cycle the power remotely (1 pin). That leaves one pin spare for the thing that I forgot.

I have a plan to put a 20-pin IDC female header on the small flat side of the slug (where the FCC compliance label is, in fact - specifically where the words "This device ... may cause undesired operations" are).

There is space on the PCB for such a female header on ribbon cable to fit between L2 (the coil) and the power plug, and to clear the power plug as you insert and remove the PCB from the case. In fact, there is probably just enough space to squeeze in a 34-pin connector between the power plug and C45, as long as you mount it up above L2.

From there, the ribbon cable will splay out to the serial port, the jtag port, and anything else I care to connect to it.

The pinout of the connector will be designed to allow the Digilent JTAG cable on six pins, then a spare pin (for TRST_N), then three pins for the serial port. That's one row. The other row will be taken up by the second receive only serial port (2 pins), the usb 1.1 port (3 pins, including power), the I2C? port (2 pins), and the reset button (1 pin), and maybe a signal to cycle the power remotely (1 pin). That leaves one pin spare for the thing that I forgot.

I have a plan to put a 20-pin IDC female header on the small base of the slug (where the FCC compliance label is, in fact - specifically where the words "This device ... may cause undesired operations" are).

There is space on the PCB for such a female header on ribbon cable to fit between L2 (the coil) and the power plug, and to clear the power plug as you insert and remove the PCB from the case.

I will glue the female header through a rectangular hole cut in the case, and run the cable along the inside of the top of the case (when you have the case lying down on the four rubber feet).

From there, the 20 way ribbon cable will splay out to the serial port, the jtag port, and anything else I care to connect to it.

The pinout of the 20 way connector will be designed to allow the Digilent JTAG cable on six pins, then a spare pin (for TRST_N), then three pins for the serial port. That's one row. The other row will be taken up by the second receive only serial port (2 pins), the usb 1.1 port (3 pins, including power), the I2C? port (2 pins), and the reset button (1 pin), and maybe a signal to cycle the power remotely (1 pin). That leaves one pin spare for the thing that I forgot.