Battery Current Consumption Monitor; Jtag & Etm Interface Connector - LG KE820 Service Manual

3. TECHNICAL BRIEF

3.11 Battery current consumption monitor

KE820/KG99 use a current monitoring function to calculate the battery capacity and the remaining
time, as monitoring current flow from the battery thru 47mohm resistor.
CN201
1
G1
2
G2
3
3.12 JTAG & ETM interface connector
In key back-light illumination, there are 14 Blue LEDs in Main Board, which are driven by
KEY_BACKLIGHT signal from AD6720.
_TRST
TDI
TMS
TCK
RTCK
TDO
_EXTRST
TRIG_IN
TRIG_OUT
MON1
MON2
Figure 20 JTAG & ETM(Embedded Trace Module) interface connector
VSUPPLY VBAT
R204
47mohm
R207
BATT_TEMP
1K
C205
27p
Figure 19 Current monitor circuit
2V72_IO 1V8_MEM
CN101
G1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R132 R133
G3
NA NA
TP129
TP130
U201
5 1
LOAD NC
2
GND
4 3
VIN IOUT
ZXCT1010E5TA
C204 R210
1u
G2
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
G4
- 48 -
I_MONITOR
2.2K
TRACEPKT(0:7)