Sony CMD MZ5 - Manual (Page 7)

7
2.6 Accessory Interface
The table explains what kind of pins the phone supplies to the different accessories.
Pins
GND
18
Charge
1/2
ACC
Power
3
Audio
IN
14
Audio
Out
13
ACC
ID
11
ACC
Detect
6
TX
(OUT)
9
RX
(IN)
10
Audio
GND
12
RF
GND
19/22
RF
20
AC-Adapter
(QN-2TC)
√ √
CLC
(QN-2CC)
√ √
Desktop Charger
(1-476-508-11)
√ √
HFK
(QN-MZ5HFK)
√ √ √ √ √ √ √ √ √ √
PCMCIA
(QN-2PCM)
√ √ √ √ √ √
EasyCom
(QN-2EC)
√ √ √ √ √ √
Connector layout
The Connector comprises the following pins:
Detection:
The detection of accessory is done by the charge pin and the detect pin.
Any accessory with an active charge will wake up the phone, indicating the battery icon but cannot be operated.
The insertion and removal of the charger (Cigar Lighter Charger, Desktop-Charger, AC-Charger) is detected by the
charge voltage.
The insertion and removal of other accessory is detected via an Interrupt. This detection is only possible when the
phone is powered up.
ID:
The ID pin indicates what kind of accessory is connected.
ACC power:
ACC-power has different functionality with different accessories. ACC-power supplies will be used as a signaling
pin for the Hands Free Kit.
In the car-kit environment the ext. Vbat indicates that a phone call is accepted/in progress. This information is used
by the car-kit to power up the audio section of the car-kit, mute the car stereo and keep the car-kit powered up
even when the ignition is switched off.
RX and TX:
This is the communication interface to the PCMCIA card “QN-2PCM” or the PC-link cable “QN-2EC”.
Audio In and Audio Out
These pins build the audio interface to the Head-Set and the Hands Free Kit.
Audio IN:
To limit the noise which is coupled on the Mic-line, the Mic amplifier in the Hands Free Kit “QN-MZ5HFK”.
Audio OUT:
The single ended output delivers 350mV into a 10kW load.