LG PRADA KE850 - Battery Current Consumption Monitor; JTAG & ETM Interface Connector

3. TECHNICAL BRIEF
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3.11 Battery current consumption monitor
KE850 use a current monitoring function to calculate the battery capacity and the remaining time, as
monitoring current flow from the battery thru 47mohm resistor.
3.12 JTAG & ETM interface connector
In case of KE850 mass production, the JTAG & ETM interface connector will not be mount on board.
That is only for developing and software debugging purpose.( It will not be mounted on mass
production PCB)
VBAT
R219
100K
R220
47mohm
G1
G2
1
2
3
CN201
2.2K
R223
GND
2
3
IOUT
LOAD
51
NC
VIN
4
U205
ZXCT1010E5TA
C233
27p
VSUPPLY
VBAT
C231
2.2u
39p
C232
1K
R222
LOAD
BAT_ID
Figure 17 Current monitor circuit
ON BOARD ARM9 JTAG & ETM INTERFACE
1V8_SD
2V72_IO
29
30
17
18
19
20
21
22
23
24
G1 G2
G3 G4
13
14
15
2
3
4
5
6
7
8
9
16
25
26
27
28
CN101
1
10
11
12
TRIG_OUT
TDO
TMS
TCK
RTCK
TDI
TRSTn
TRIG_IN
EXTRSTn
TRACEPKT7
TRACEPKT5
TRACEPKT3
TRACEPKT1
TRACECLK
TRACEPKT4
TRACEPKT6
TRACESYNC
PIPESTAT0
PIPESTAT1
PIPESTAT2
TRACEPKT0
TRACEPKT2
Figure 18 JTAG & ETM(Embedded Trace Module) interface connector