Sony Ericsson GM48, GM47 manual General Electrical and Logical Characteristics, Afms, Atms, Agnd

GM47/GM48 INTEGRATOR’S MANUAL

Pin	Signal Name	Dir	Signal Type	Description
56	BEARN	O	Analogue	Speaker output negative
57	AFMS	O	Analogue	Audio output from module
58	SERVICE	I	2.7V	Flash programming voltage for the MS.
				Enable logger information if not
				flashing. Formerly VPPFLASH
59	ATMS	I	Analogue	Audio input to module
60	AGND	-	-	Analogue ground

2.2 General Electrical and Logical Characteristics

Many of the signals, as indicated in the table above, are high-speed CMOS logic inputs or outputs powered from a 2.75V±5% internal voltage regulator, and are defined as Digital 2.75V. Whenever a signal is defined as Digital 2.75V, the following electrical characteristics apply.

Parameter	Min.	Max.	Units
High Level Output Voltage (VOH), Io = –2mA	2.2	2.75	V
Low Level Output Voltage (VOL), Io = 2mA	0	0.6	V
High Level Input Voltage (VIH)	1.93	2.75	V
Low Level Input voltage (VIL)	0	0.8	V

Note! Unused pins can be left floating.

2.2.1General Protection Requirements

•All 2.75V digital inputs will continuously withstand and suffer no damage in the power-on or power-off condition when subjected to any voltage from -0.5V to 3.47V (3.3V+5%).

•All 2.75V digital outputs will continuously withstand a short circuit to any other voltage within the range 0V to 3V.

•All analogue outputs will continuously withstand a short circuit to any voltage within the range 0V to 3V.

•The SIM output signals and the SIMVCC supply will continuously withstand a short circuit to any voltage within the range 0V to 5.8V.

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LZT 123 7263 R1C