Interfaces And Test Points - Panasonic EB-GD90 Technical Manual

No. Name
10 EXT-PWR
11 NON_HOOK
12 SERIAL_OUT
13 SERIAL_IN
14 nADP_SENSE
15 NH/F_ON
16 GND
17 TX_AUDIO
18 GND
MCUK990801G8
Technical Guide
http://cxema.ru
H/H <=> EXT Total Function
<== 2 Power supply for battery charging, Power ON/
Off control and accessory control circuits.
Voltage: 5.8 ± 0.2 V
Current: 650 ± 50 mA
<== 1 Indicates if the optional second handset is on or
off hook. In handsfree operation, if the optional
handset is not fitted this signal defaults to on
hook. (Low.)
==> 1 Downlink Serial Data
(Baud rate is same as SERIAL_IN)
<== 1 Uplink Serial Data
The baud rate is dependant upon the attached
accessory, whether operating in Testset Mode
or Flash Downloading.
SMS cable: 9600 bps
RS232 Direct cable: 38.4 kbps
Data adapter: 33.8 kbps
Testset: 9600 bps
Flash Download: 56 kbps
<== 1 NADP_SENSE has 5 possible states. The state
is determined by the value of the pull-down
resistor in the attached accessory / test set.
NADP_SENSE has 2 purposes as follows:
1) To identify an attached accessory.
Open (H): No attached accessory
82 kΩ=± 1% (MH): Headset Adapter
56 kΩ=± 1% (M): SMS Cable
33 kΩ=± 1% (ML): RS232C Direct Cable
GND (L): Data Adapter
2) Determine whether the 1st of 2 conditions
are satisfied for sending the initialise Testset
command on SERIAL_OUT, and entering
Testset mode (see IGNITION for 2nd condition).
H/MH: Condition 1 satisfied
M/ML/L: Enter Testset Mode not satisfied
==> 1 Accessory Sending & Receiving Audio paths
unmute
L: unmute, Hi-Z: mute
==> 6 Refer to pin 1
<== 1 Accessory Sending Audio
-16 dBm0 = 40.4 m Vrms
==> 6 Ground connection of Dual Charger
Section 2
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INTERFACES AND TEST POINTS

H/H Circuit
Trickle Charge Circuit
Power On/Off Control Circuit
Rapid Charge Circuit
Accessory Control Circuit
100k
330
10100-1
2.2k
330
47k
4.7 k
330
10105-1
100k
330
10100-1
50k
330
200k
Refer to pin 1
1 10k 1
3k3
10106-1
Refer to pin 1
10103-1
10104-1
10101-1
Issue A
Revision 0