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INTERFACES AND TEST POINTS
Issue A
Section 2
MCUK990801G8
Revision 0
– 12 –
Technical Guide
Battery Connector
SIM Interface
19
GND
==>
6
Ground connection of Dual Charger
Refer to pin 1
20
GND
==>
6
Ground connection of Dual Charger
Refer to pin 1
21
GND
==>
6
Ground connection of Dual Charger
Refer to pin 1
22
CHARGE_ON
<=>
1
The Dual Charger shall hold CHARGE_ON to
the middle level unit a H/H is inserted into the
front slot.
H: 2.0<=V<=3.0 volts; Dual Charger detects
connection of H/H
M: 1.0<=V<2.0 volts; Unconnected
L: 0.0<=V<1.0 volts; Dual Charger detects
connection of H/H
23
EXT_PWR
<==
2
The Dual Charger shall control switching of the
power supply to the front slot (corresponds to
EXT_PWR) based on the state of the
CHARGE_ON signal.
H: EXT_PWR supplied
L: When the H/H can determine whether or not
to set CHARGE_ON. After the insertion of the
H/H, EXT_PWR shall be subsequently supplied
within
TBA
hours
Refer to pin 8
No.
Name
H/H <=> EXT
Total
Function
H/H Circuit
1
VBAT
<==
1
Positive battery terminal.
Li+ (2 cells in parallel): 3.6 V nom.
NiMH (3 cells in series): 3.6 V nom.
2
BAT_TEMP
<==
1
BAT_TEMP has 2 purposes.
1) Determine whether a battery is attached to
the H/H.
2) Monitor battery temperature for the purposes
of charging.
H: Abnormal battery
M: Li+ or NiMH charging
L: No battery or abnormal battery
3
GND
<==
1
Negative battery terminal
4
BAT_ID
<==
1
BAT_ID is used to identify the type of attached
battery.
H: Li+ or no battery
L: NiMH
Pin
Signal
1
GND
2
5 V
3
Not connected
4
Reset
5
Serial input/output
6
Clock
7
Not connected
8
Not connected
No.
Name
H/H <=> EXT
Total
Function
H/H Circuit
10k
330
CHARGE_ON
0.1µ
10107-1
10108-1
ChargerIC VREFOUT
ESD
Vega_ADIN2
ESD
Protection
10109-1
10110-1
