Sony Ericsson GM48, GM47 manual General Purpose Digital I/O Ports

GM47/GM48 INTEGRATOR’S MANUAL

The following circuit should be used to connect an LED.

VIO

GM47

LED

DGND

220

2k2

BC817

10k

Figure 2.8 Electrical connections for the LED

2.13 General Purpose Digital I/O Ports

Pin	I/O port	Default	Description
	signal	signal
21	IO1	-	Programmable Input/Output 1
22	IO2	-	Programmable Input/Output 2
23	IO3	-	Programmable Input/Output 3
24	IO4	-	Programmable Input/Output 4
37	IN5	DTR	Programmable input 5/Data Terminal Ready
32	OUT5	-	Programmable output 5
36	OUT6	RI	Programmable Output 6/Data Carrier
			Detect
38	OUT7	DCD	Programmable Output 7/Ring indicator

Signals which have an entry in the Default Signal column in the above table are multiplexed. Their operation depends on AT commands.

The following table gives you the input impedance. These values only apply when the signals are configured as input signals.

Parameter	Min.	Typ.	Max.	Units
Input impedance (IO1 - IO4) (pull-up)	20	39	100	kΩ
Input impedance (IN5)	100			kΩ

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