Sony Ericsson GM47, GM48 manual Grounds, VCC Regulated Power Supply Input

2. SYSTEM CONNECTOR INTERFACE

2.3 Grounds

Pin	Signal	Description
2, 4, 6, 8, 10, 12	DGND	Digital ground
60	AGND	Analogue ground

There are two ground connections in the GM47, AGND (analogue ground) and DGND (digital ground). Pin assignments are shown in the table above.

Note! AGND and DGND are connected at a star point inside the module. They must not be joined together in your application.

2.3.1 Analogue Ground - AGND

AGND is the return signal, or analogue audio reference, for ATMS (Audio To Mobile Station) and AFMS (Audio From Mobile Station).

Parameter	Limit
Imax	≅12.5mA

2.3.2 Digital Ground - DGND

DGND is the reference or return signal for all system interface digital signals and is also the d.c. return for SERVICE and the power supply, VCC. Connect all DGND pins together in your application in order to carry the current drawn by the module.

2.4 VCC - Regulated Power Supply Input

Pins	Signal	Description
1, 3, 5, 7, 9, 11	VCC	regulated power supply input

Power is supplied to the module VCC pins, from an external source.

Connect all VCC pins together in your application in order to carry the current drawn by the module.

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LZT 123 7263 R1C