LG 32LG710H Service Manual page 42

PTC
RXD0-43
TXD0-44
MODC/TAGHI/BKGD
Download/debugging
TXD2-3
RXD2-2
Communication
RXD0-41
TXD0-42
BCM3549
Communication
GPIO31-P25
GPIO30-P26
Debugging
GPIO16-P24
GPIO15-P23
Copyright ⓒ 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
UART block diagram
FOR MPI
PTC_DEBUG_TX
PTC_DEBUG_RX
PTC_RX_5V
PTC_TX
PTC_TX_1
PC_SIMUL
1 0
1
C
UART_SWB
PTC_RX_BCM_5V
PTC_TX_BCM
PTC_RX_BCM_3.3V
BCM_TX
BCM_RX
Level
shifter
UART_SWA
1
0
D
0
1
0
UART_SWA
FOR Initial Download
PTC_RX_MNT
buffer
PTC_TX_MNT
buffer
opt
11
14
T1IN
T1OUT
12
13
R1OUT
R1IN
FOR
BCM Debuging
and
PTC Download / Debugging
and
Monitoring
LGE Internal Use Only