Battery Current Consumption Monitor; Jtag & Etm Interface Connector - LG KE770 Service Manual

3.11 Battery current consumption monitor

KE770use a current monitoring function to calculate the battery capacity and the remaining time, as
monitoring current flow from the battery thru 47mohm resistor.
BATTERY CURRENT MONITOR
CN201
G2
G1
3.12 JTAG & ETM interface connector
2V72_IO
_TRST
TDI
TMS
TCK
RTCK
TDO
_EXTRST
TRIG_IN
TRIG_OUT
TP114
MON1
TP115
MON2
Figure 16 JTAG & ETM(Embedded Trace Module) interface connector
In case of KE770mass 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)
VSUPPLY VBAT
R204
47mohm
(47 milli Ohm)
3
R207
2
BATT_TEMP
1K
1
(1%)
C213
27p
Figure 15 Current monitor circuit
1V8_MEM
CN101
G1 G2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R126 R127
NA
NA
G3 G4
- 45 -
3. TECHNICAL BRIEF
U201
5 1
LOAD NC
2
GND
4 3
VIN IOUT
ZXCT1010E5TA
C204 R209
1u 2.2K
30
29
TRACECLK
28
TRACEPKT(7)
27
TRACEPKT(6)
26
TRACEPKT(5)
25
TRACEPKT(4)
24
TRACEPKT(3)
23
TRACEPKT(2)
22
TRACEPKT(1)
21
TRACEPKT(0)
20
PIPESTAT2
19
PIPESTAT1
18
PIPESTAT0
17
TRACESYNC
16
I_MONITOR
(1%)
TRACEPKT(0:7)