Panasonic EB-GD90, Technical Manual

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INTERFACES AND TEST POINTS
MCUK990801G8 Section 2 Issue A
Technical Guide – 11 – Revision 0
10 EXT-PWR <== 2 Power supply for battery charging, Power ON/
Off control and accessory control circuits.
Voltage: 5.8 ± 0.2 V
Current: 650 ± 50 mA
11 NON_HOOK <== 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.)
12 SERIAL_OUT ==> 1 Downlink Serial Data
(Baud rate is same as SERIAL_IN)
13 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
14 nADP_SENSE <== 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 k
Ω =
± 1% (MH): Headset Adapter
56 k
Ω =
± 1% (M): SMS Cable
33 k
Ω =
± 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
15 NH/F_ON ==> 1 Accessory Sending & Receiving Audio paths
unmute
L: unmute, Hi-Z: mute
16 GND ==> 6 Refer to pin 1 Refer to pin 1
17 TX_AUDIO <== 1 Accessory Sending Audio
-16 dBm0 = 40.4 m Vrms
18 GND ==> 6 Ground connection of Dual Charger Refer to pin 1
No. Name H/H <=> EXT Total Function H/H Circuit
10103-1
Trickle Charge Circuit
Power On/Off Control Circuit
Rapid Charge Circuit
Accessory Control Circuit
330
100k
10100-1
330
2.2k
47k
10104-1
330
4.7 k
10105-1
330
100k
10100-1
330
50k
200k
10101-1
1 1 10k
3k3
10106-1