Pin	Name	Function	Specs
1	CHARGE	Charging voltage	0..8.5V, 0..850mA
2	CCONTROL	Charging control	PWM, 32..37 Hz, 1..99%
3	MIC / XMIC	Analog audio in	1Vpp / 100 Ohm
		Analog audio in (Headset)	200mVpp / 2.5 KOhm / BIAS 100..600uA
		Accessory mute	> 2.5V not muted < 1.5V muted
		Headset detection	> 1.5V no Headset / Data mode < 1.3V Headset connected
4	AGND	Analog ground
		Power Source for DLR3-cable	6210 : 2.8 V, 7110 : 3.3 V
5	EAR / XEAR	Analog audio out	U = 80mV - 1.0V
		Accessory detection	< 0.2V : Headset connected 0.5V : Accessory connected 2.8V : no accessory connected
		PTT-Button	connected to AGND when pressed
6	MBUS	Bidir. serial bus	9600 bps
7	FBUS RX	Serial data in	9600 - 230.400 bps < 0.8V : '0' > 2.0V : '1'
8	FBUS TX	Serial data out	9600 - 230.400 bps < 0.8V : '0' @ max. 4mA > 1.7V : '1' @ max. 4mA
9	SGND	Signal ground / Charging ground

M2BUS Cable Schematic
This cable is the same for all Nokia phones.
NCDS Interface Schematic for Nokia 5110, 6110 & 7110



E-mail me at ajp@radiowaves.fsnet.co.uk



This page was updated 22nd November 2002