Telit Wireless Solutions manual Signals of the UC864-E serial port are

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UC864-E Hardware User Guide

1vv0300766a Rev.1 - 31/01/08

The signals of the UC864-E serial port are:

RS232		UC864-E
Pin	Signal	Pad	Name
Number		Number
1	DCD	32	Data Carrier Detect
	dcd_uart
2	RXD	26	Transmit line *see Note
	tx_uart

3	TXD	25	Receive line *see Note
	rx_uart
4	DTR	29	Data Terminal Ready
	dtr_uart
5	GND	5,6,7	Ground
6	DSR	27	Data Set Ready
	dsr_uart
7	RTS	31	Request to Send
	rts_uart
8	CTS	28	Clear to Send
	cts_uart
9	RI	30	Ring Indicator
	ri_uart

Usage

Output from the UC864-E that indicates the

carrier presence

Output transmit line of UC864-E UART

Input receive of the UC864-E UART

Input to the UC864-E that controls the DTE

READY condition

Ground

Output from the UC864-E that indicates the

module is ready

Input to the UC864-E that controls the

Hardware flow control

Output from the UC864-E that controls the

Hardware flow control

Output from the UC864-E that indicates the

incoming call condition

NOTE: According to V.24, RX/TX signal names are referred to the application side, therefore on

the UC864-E side these signal are on the opposite direction: TXD on the application side will be connected to the receive line (here named TXD/ rx_uart ) of the UC864-E serial port and vice versa for RX.

TIP: For a minimum implementation, only the TXD and RXD lines can be connected, the other lines can be left open provided a software flow control is implemented.

Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved

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Contents UC864 Hardware User Guide This document is relating to the following products UC864-E Hardware User GuideContents 11.2 10.310.4 11.1Disclaimer Overview Length 36.2 mm Width 30 mm Thickness 8mm Mechanical DimensionsPIN-OUT UC864-E module connectionsCmos Reserved Pin Signal Function 1 UC864-E Antenna connectorTurning on the UC864-E Hardware Commands10k Hardware shutdown Turning OFF the UC864-EHardware Unconditional Restart 10k +1.8 Power Supply Requirements Power SupplyUC864-E Hardware User Guide Electrical Design Guidelines General Design Rules1.2 + 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 Requirements AntennaAntenna Installation Guidelines Operating Range Interface levels 1.8V Cmos Logic level specificationsAbsolute Maximum Ratings -Not Functional Operating Range Interface levelsReset signal Absolute Maximum Ratings Not Functional Serial PortsSignals 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 Communication ports combinations USB PortSelection Audio Section OverviewGenerality DefinitionsInput lines microphone Electrical CharacteristicsEarMT Buffers Output lines speakerNot General Purpose I/OLogic level specifications Using a Gpio Pad as Output Using a Gpio Pad as InputUsing the Alarm Output GPIO6 Using the Buzzer Output GPIO7 LED status Device Status Indication of network service availabilityOperating Range VAUX1 power supply VAUX1 power outputRTC Bypass out Mounting UC864-E on your board USB Vbus Usbid Debug of the UC864-E in productionConformity Assessment Issues Safety Recommandations Revision Date Changes Document Change Log