{| border="1" cellpadding="5" cellspacing="0"
|-
| style="width:100px;background:limegreen;" | USBH_PWR1 || colspan="2" | Over-current indicator (input, active low)
|-
| style="background:limegreen;" | USBH_PEN1 || colspan="2" | Power enable USB port (output)
|-
| style="background:limegreen;" | USBH_P1 || rowspan="4" align="center" | USB port || USB D+
|-
| style="background:limegreen;" | USBH_N1 || USB D-
|-
| style="background:tomato;" | V_BATT || USB VBUS
|-
| style="background:grey;" | GND || USB DGND
|}

The [[24pin_connector|24-pin flex ribbon]] connector has '''USB port 1''' on it. '''USB port 2''' is on the [[60pin_connector|60-pin Hirose connector]]

The pinouts you need for USB port 1 are:

* V_BATT (pin 24) - USB power
* USBH_N1 (pin 18) - USB D-
* USBH_P1 (pin 17) - USB D+
* GND (pin 8) - USB Ground

In addition, you need to pull USBH_PWR1 (pin 20) up to 3.3 volts to enable the port. You need to provide a stable 3.3 volt supply, which is fairly simple to do by adding a small SOT23 package voltage regulator (like the [http://www.national.com/mpf/LM/LM3480.html LM3480]), with the power input coming from V_BATT (pin 24) and the output going to USBH_PWR1 (pin 20).

'''WARNING:''' This page is at this moment incomplete/inaccurate! D+/D- require 15K pull-down resistors, 10-25 ohm series resistors and 68-75pF capacitors. ESD and overcurrent protection is suggested. check PXA270 Design Guide, P. 202 (link on the bottom of this page)

== Examples ==

[[image:24-pin-usb-example.png]]

'''U1''': LM3480 3.3V Voltage regulator

'''C1,C2''': 0.1uF Capacitors

(*this example may not work, read warning above)

[[image:24pin-connector-usb-example.png]]

== Related ==

[http://pubs.gumstix.com/documents/PXA%20Documentation/PXA270/PXA270%20Design%20Guide%20%5b280001-002%5d.pdf PXA270 Design Guide, P. 202]

[http://www.usb.org/developers/docs/usb_20_092407.zip Universal Serial Bus Revision 2.0 specification]

[ftp://ftp.compaq.com/pub/supportinformation/papers/hcir1_0a.pdf Open HCI—Open Host controller Specification for USB]

[http://www.fairchildsemi.com/an/AN/AN-5052.pdf Implementing the Physical Layer in a USB 2.0 Compliant System, AN-5052, Fairchild Semiconductor]

.
[[Category:Literature]]

2008-04-04T20:35:46Z

Zyagon:

{| border="1" cellpadding="5" cellspacing="0"
|-
| style="width:100px;background:limegreen;" | USBH_PWR1 || colspan="2" | Pull-up to 3.3 volts to enable USB port
|-
| style="background:limegreen;" | USBH_PEN1 || colspan="2" |
|-
| style="background:limegreen;" | USBH_P1 || rowspan="4" align="center" | USB port || USB D+
|-
| style="background:limegreen;" | USBH_N1 || USB D-
|-
| style="background:tomato;" | V_BATT || USB VBUS
|-
| style="background:grey;" | GND || USB DGND
|}

The [[24pin_connector|24-pin flex ribbon]] connector has USB port 1 on it.
The pinouts you need are:

* V_BATT (pin 24) - USB power
* USBH_N1 (pin 18) - USB D-
* USBH_P1 (pin 17) - USB D+
* GND (pin 8) - USB Ground

In addition, you need to pull USBH_PWR1 (pin 20) up to 3.3 volts to enable the port. You need to provide a stable 3.3 volt supply, which is fairly simple to do by adding a small SOT23 package voltage regulator (like the [http://www.national.com/mpf/LM/LM3480.html LM3480]), with the power input coming from V_BATT (pin 24) and the output going to USBH_PWR1 (pin 20).

== Examples ==

[[image:24-pin-usb-example.png]]

U1: LM3480

C1,C2: 0.1uF

== Related ==

[http://www.usb.org/developers/docs/usb_20_092407.zip Universal Serial Bus Revision 2.0 specification]

[ftp://ftp.compaq.com/pub/supportinformation/papers/hcir1_0a.pdf Open HCI—Open Host controller Specification for USB]

.
[[Category:Literature]]

File:24-pin-usb-example.png

2008-04-04T20:33:04Z

Zyagon: uploaded a new version of "Image:24-pin-usb-example.png"

2008-03-26T23:48:48Z

Zyagon:

{| border="1" cellpadding="5" cellspacing="0" style="width:100px"
| style="background:yellow;" | GPIO( n )
|}

all GPIO's information and examples should go here

todo

According to the PXA270 datasheet:
http://pubs.gumstix.com/documents/PXA%20Documentation/PXA270/PXA270%20Electrical,%20Mechanical,%20and%20Thermal%20Specification%20%5b280002-005%5d.pdf
most of the pins are limited to 3mA, and a few can go upto 4 mA (see page 5-9)

 
 
 
 
 
-----------------------------

Related pages on the old wiki:

http://docwiki.gumstix.org/GPIO_event

http://docwiki.gumstix.org/Tips_and_tricks#Access_GPIOs_from_user-space

http://docwiki.gumstix.org/Sample_code/C/gpregs

http://docwiki.gumstix.org/Kernel_programming

.
[[Category:Literature]]

USB

2008-03-24T23:59:27Z

Zyagon:

USB

2008-03-24T23:46:45Z

Zyagon:

2008-03-18T19:32:57Z

Zyagon: New page: == V_BATT == {| border="1" cellpadding="5" cellspacing="0" style="width:120px" |- | style="background:tomato;" | V_BATT |- | style="background:grey;" | GND |} == V_BACKUP_BATT == ...

== V_BATT ==

{| border="1" cellpadding="5" cellspacing="0" style="width:120px"
|-
| style="background:tomato;" | V_BATT
|-
| style="background:grey;" | GND
|}

== V_BACKUP_BATT ==

{| border="1" cellpadding="5" cellspacing="0" style="width:120px"
|-
| style="background:salmon;" | V_BACKUP_BATT
|-
| style="background:grey;" | GND
|}

This net connects to the pin 'VBACKUP' of the power management chip [http://focus.ti.com/docs/prod/folders/print/tps65022.html TPS65022].
 It exists to source power from an off-board backup battery. V_BACKUP_BATT is located on the [[24pin connector|24-pin flex ribbon]] (Verdex only) connector

If your application needs a backup battery, connect a 3V Li-Ion cell directly to '''V_BACKUP_BATT''' and '''GND''' and remove R9 (0 Ohm resistor to ground).

Use a boost converter (ex. [http://focus.ti.com/docs/prod/folders/print/tps61070.html TPS61070]) if you use a single NiMH battery

In systems where no backup battery is used, this net is connected to GROUND. 
On the verdex, this is done with R9 (0 Ohm resistor), which is populated by default on our website-sale boards.

== Powering Gumstix from batteries ==

.
[[Category:Literature]]