Telit Wireless Solutions GE864 manual Contents

				GE864 Hardware User Guide
				1vv0300694 Rev.10 - 10/06/08
Contents
1	Overview			7
2	GE864 Mechanical Dimensions			8
3	GE864 module connections			9
	3.1	PIN-OUT		9
	3.1.1		BGA Balls Layout	13
4	Hardware Commands			15
	4.1	Turning ON the GE864-QUAD / PY		15
	4.2	Turning OFF the GE864-QUAD / PY		17
	4.2.1		Hardware shutdown	17
	4.2.2		Hardware Unconditional Restart	17
5	Power Supply			19
	5.1	Power Supply Requirements		19
	5.2	General Design Rules		20
	5.2.1		Electrical Design Guidelines	20
		5.2.1.1 + 5V input Source Power Supply Design Guidelines		20
		5.2.1.2 + 12V input Source Power Supply Design Guidelines		21
		5.2.1.3 Battery Source Power Supply Design Guidelines		23
		5.2.1.4 Battery Charge control Circuitry Design Guidelines		24
	5.2.2		Thermal Design Guidelines	26
	5.2.3		Power Supply PCB layout Guidelines	27
6	Antenna			28
	6.1	GSM Antenna Requirements		28
	6.2	GSM Antenna – PCB line Guidelines		29
	6.3	GSM Antenna – Installation Guidelines		30
7	Logic level specifications			31
	7.1	Reset signal		32
8	Serial Ports			33
	8.1	MODEM SERIAL PORT		33
	8.2	RS232 level translation		35
	8.3	5V UART level translation		37
9	Audio Section Overview			39
	9.1	INPUT LINES (Microphone)		40
	9.1.1		Short description	40
	9.1.2		Input Lines Characteristics	41

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