Telit Wireless Solutions manual Hardware Commands, Turning on the UC864-E

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UC864-E Hardware User Guide

1vv0300766a Rev.1 - 31/01/08

4 Hardware Commands

4.1Turning ON the UC864-E

To turn on UC864-E, the pad ON# must be tied low for at least 1 second and then released. The maximum current that can be drained from the ON# pad is 0,1 mA.

A simple circuit to do it is:

R1

Power ON impulse

ON#

Q1

R2

GND

NOTE: UC864-E turns fully on also by supplying power to the USB_VBUS pin (provided there's a battery on the VBATT pads). Care must be taken to avoid supplying power to the USB_VBUS pin before the module turns on.

To check if the UC864-E has powered on, the hardware line PWRMON should be monitored. When PWRMON goes high, the module has powered on.

NOTE: don't use any pull up resistor on the ON# line, it is internally pulled up. Using pull up resistor may bring to latch up problems on the UC864-E power regulator and improper power on/off of the module. The line ON# must be connected only in open collector configuration.

NOTE: In this document all the lines that are inverted, hence have active low signals are labeled with a name that ends with a "#" or with a bar over the name.

NOTE: UC864-E turns fully on also by supplying power to the Charge pad (provided there's a battery on the VBATT pads).

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Contents UC864 Hardware User Guide UC864-E Hardware User Guide This document is relating to the following productsContents 10.3 10.411.1 11.2Disclaimer Overview Mechanical Dimensions Length 36.2 mm Width 30 mm Thickness 8mmUC864-E module connections PIN-OUTCmos Reserved 1 UC864-E Antenna connector Pin Signal FunctionHardware Commands Turning on the UC864-E10k Turning OFF the UC864-E Hardware shutdownHardware Unconditional Restart 10k +1.8 Power Supply Power Supply RequirementsUC864-E Hardware User Guide General Design Rules Electrical Design Guidelines1.2 + 12V input Source Power Supply Design Guidelines UC864-E Hardware User Guide Battery Source Power Supply Design Guidelines UC864-E Hardware User Guide Thermal Design Guidelines Power Supply PCB layout Guidelines Antenna Antenna RequirementsAntenna Installation Guidelines Logic level specifications Absolute Maximum Ratings -Not FunctionalOperating Range Interface levels Operating Range Interface levels 1.8V CmosReset signal Serial Ports Absolute Maximum Ratings Not FunctionalSignals of the UC864-E serial port are RS232 level translation UC864-E Hardware User Guide UC864-E Hardware User Guide 5V Uart level translation UC864-E Hardware User Guide USB Port Communication ports combinationsAudio Section Overview GeneralityDefinitions SelectionElectrical Characteristics Input lines microphoneOutput lines speaker EarMT BuffersGeneral Purpose I/O NotLogic level specifications Using a Gpio Pad as Input Using a Gpio Pad as OutputUsing the Alarm Output GPIO6 Using the Buzzer Output GPIO7 Indication of network service availability LED status Device StatusVAUX1 power output Operating Range VAUX1 power supplyRTC Bypass out Mounting UC864-E on your board Debug of the UC864-E in production USB Vbus UsbidConformity Assessment Issues Safety Recommandations Document Change Log Revision Date Changes