Cec Mcu - Sharp LC-42SB45U Service Manual

9.CEC MCU

1 2
A
B
CN500
0402/SMD
R505 NC/33R 1/16W 5%
1
R506 NC/33R 1/16W 5%
2
3
NC/63383 3P 2.0mm
CEC_MCU ISP
C
D
DV33SB
E
Q501
MAIN_SDA NC/2N7002
DV33SB
+3V3SB
R534 Q502
MAIN_SCL NC/2N7002
NC/10K 1/16W 5%
LED_R# R540 NC/0R05 1/16W
Q508 CEC_LED_R
NC/MUN2211TIG
R533 NC/10K 1/16W 5%
+3V3SB
F
LED_W#
R541 NC/0R05 1/16W
Q507 CEC_LED_G
+5V_STB NC/MUN2211TIG
+3V3SB
R509
NC/10K 1/10W
Q500
RC6 NC/2N7002 RC6_CEC
G
LED_G#:
Enable: Low
Disable(Stand_By): High
LED_R#:
Enable(Stand_By): High
Disable: Low
H
1 2
3 4 5
+3V3SB
Reserved
uP_SCL1
uP_SDA1
0402/SMD
RESET_CECMCU: from LOW to HIGH
(CEC MCU Reset)
+3V3SB
+3V3SB
+3V3SB FB500
1 2
NC/220R/400mA
U500
uP_SDA1 R518 33R 1/16W 5%
20
DSDA1
uP_SCL1 R520 33R 1/16W 5%
21
DSCL1
uP_SDA2 R521 33R 1/16W 5%
22
GPIOA5/DSDA2
uP_SCL2 R543 33R 1/16W 5%
23
GPIOA4/DSCL2
24
GPIOA3/P03
25
GPIOA2/P02
R507 NC/33R 1/16W 5%
26
GPIOA1/P01
R512 33R 1/16W 5%
27
GPIOA0/P00
5
GPIOB6/SSDA
6
GPIOB5/SSCL
7
GPIOB4/P05
8
GPIOB3/P04
R523 33R 1/16W 5%
9
GPIOB2/IR
HDMI_CEC R516 33R 1/16W 5%
10
GPIOB1/IRQ3
11
GPIOB0/IRQ2
0402/SMD
C505 NC/27P 50V
X500
NC/12MHZ 3
OSCO
C506 NC/27P 50V
4
OSCI
0402/SMD
43
NRST
RESET_CECMCU R527
NEW PARTS
NC/33R 1/16W 5%
3 4 5
6 7
DV33SB
DV33SB
R542
Q505 4K7 1/16W 5%
NC/2N7002 R538 0R05 1/16W
0402/SMD
RXD_CEC U0RX
U0RX 7
0402/SMD
R601 0R05 1/16W
Reserved for OTS42"
DV33SB
DV33SB
R549
Q506 4K7 1/16W 5%
NC/2N7002 R539 0R05 1/16W
0402/SMD
TXD_CEC U0TX
U0TX 7
0402/SMD
R602 0R05 1/16W
Reserved for OTS42"
R536 NC/10K 1/10W 5%
RESET_CECMCU
C512
NC/4.7UF 10V
U501
RESET_CECMCU
2
RESET
3
Vcc
1
GND
R511
NC/100K 1/16W 5%
NC/LM809M3X-2.93
+3V3SB
C508
NC/100N 16V + C511
NC/47uF 25V
12
GPIOC7/P17/IRQ1
13
GPIOC6/P16/IRQ0
R519 33R 1/16W 5% TXD_CEC
14
GPIOC5/P15/TXD1
R522 33R 1/16W 5%
15
GPIOC4/P14/RXD1
RXD_CEC
16
GPIOC3/AD3
17
GPIOC2/AD2
18
GPIOC1/AD1
R524 33R 1/16W 5% KEY_UP_DN
19
GPIOC0/AD0
28
GPIOD7/RXD2
29
GPIOD6/TXD2
R548 33R 1/16W 5% CEC_PWR
30
GPIOD5/P13
31
GPIOD4/P12
32
GPIOD3/P11
R525 33R 1/16W 5% DC_SWITCH
33
GPIOD2/P10
34
GPIOD1/HIN2
R528 33R 1/16W 5% VGA_HIN
35
GPIOD0/HIN1
R529 33R 1/16W 5% INT_CEC
44
GPIOE0
42
GPIOE1/PWM0/PWMA0
41
GPIOE2/PWM1/PWMA1
40
GPIOE3/LPWM/PWMA2
R544 33R 1/16W 5% CEC_Audio_Power
39
GPIOE4/P06
38
GPIOE5/P07
37
GPIOE6/VIN2
R517 33R 1/16W 5% VGA_VIN
36
GPIOE7/VIN1
NC/WT61P7-LQFP44
AMP Power_UP:
HIGH:Audio AMP Power Off
LOW: Audio Power On
6 7
73
8 9 10
KEY_UP_DN
5,7 KEY_UP_DN
+5V_STB
1,2,7,8 +5V_STB
+3V3SB
1,2 +3V3SB
HDMI_CEC
5,12 HDMI_CEC
CEC_PWR
1 CEC_PWR
MAIN_SCL
5 MAIN_SCL
MAIN_SDA
5 MAIN_SDA
LED_W#
7 LED_W#
RC6
7,8 RC6
LED_R#
7 LED_R#
DC_SWITCH
5,7 DC_SWITCH
CEC_INT
5 CEC_INT
1,2,3,4,5,6,7,8,10,11,12,13,14 GND
VGA_HIN
10 VGA_HIN
VGA_VIN
10 VGA_VIN
DV33SB
1,5,7,12,13 DV33SB
Audio_Power_UP
13 Audio_Power_UP
RXD_CEC
7 RXD_CEC
TXD_CEC
7 TXD_CEC
Reserved
RS232_for SW debug
DV33SB
Q509
NC/2N7002 CEC_INT
NC/4K7 1/16W 5% R546
DV33SB
Audio_Power_UP
Q510
NC/MUN2211TIG
CEC_INT:
HIGH: NO interrupt
LOW: CEC MCU INTERRUPT MT538X
CEC_PWR:
Low: Turn on DV33SB(MT538X uP VCC)
High: Turn off DV33SB
8 9 10
LC-42SB45U
11
A
CN500 B2
C505 F4
C506 G4
C508 E6
C511 E6
C512 D6
FB500 E5
Q500 G2
Q501 E2
Q502 E2
Q505 A6
Q506 B6
Q507 F2 B
Q508 F3
Q509 F8
Q510 G8
R505 B3
R506 B3
R507 F4
R508 E3
R509 F2
R510 E7
R511 D6
R512 F4
R513 B3
R514 E4
R515 E4
R516 F4
C
R517 G6
R518 E4
R519 F6
R520 E4
R521 F4
R522 F6
R523 F4
R524 F6
R525 F6
R526 E3
R527 G4
R528 F6
R529 F6
R530 E7
R531 B3
R532 E7
D
R533 F2
R534 E2
R535 E8
R536 D6
R537 E7
R538 A6
R539 B6
R540 F3
R541 F3
R542 A7
R543 F4
R544 G6
R545 E7
R546 G9
R547 E3
R548 F6
E
R549 B7
R601 B6
R602 C6
TP501 B2
TP502 B2
U500 E5
U501 D6
X500 G4
F
G
H
11