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External audio connector

The system connector, containing a 4-pole Jack plug, gains the access to the external audio interface. The Jack

plug, which is integrated in the system connector, contains a mechanical switch, which is used to detect the

connection of the accessories. The configuration for the 4-pole Jack-plug is shown in the following figure.

Figure 5 4-pole jack plug for audio accessory

Table 4 Connector for External Audio Accessories

Line symbol Function

XMICP External microphone signal input

XMICN External microphone signal input

XEARP External earphone signal output

XEARN External earphone signal output

INT Accessory detection

GND Ground (Only used by PPH-1)

External signals and connections

Table 5 System connector

Signal From To Min Nom Max Condi-tion Note

XMICP HS/HF Mic UEMC

Lite

2/60mV

diff

Analog

audio in

Headset Mic bias and audio

signal 2mV nominal. HF Mic

signal 60mV nominal.

Differential symmetric

input.

DC bias

2V2kohm

Accessory detection by

bias loading

XMICN 2/60mV

diff

Ana in / 1k to

GND

Hook interrupt by heavy

bias loading

RH-70

System module Nokia Customer Care

9243364 (Issue 1, Part 3) Company Confidential Page 1–11