Technical Information - JVC AV-48P777/H Service Manual

2.4

TECHNICAL INFORMATION

2.4.1 MAIN MICRO COMPUTER (CPU) FUNCTION
Pin Pin name I/O
No.
1 P60/SBT2 - Not used
2 P_MU O Not used : Picture muting [Muting: H]
3 M_MUTE O Audio output muting [Muting: H]
4 A_MUTE O Audio muting [Muting: H]
5 ROTATION_L O Not used : Rotation control (left)
6 ROTATION_R O Not used : Rotation control (right)
7 P52/TM14OA - Not used
8 P53/TM14OB - Not used
9 DEF_RESET O Not used : Reset for deflection
10 RD_RQ I DTVM update
11 POW_LED O Lighting for Power/OnTimer LED [Power ON or TIMER ON: H]
12 DIMMER_LED O Brightness control for Power/OnTimer LED
13 P20/SBT2 O Not used : Clock for ATSC tuner communication
14 P21/SBI2 I Not used : Data receive for ATSC tuner communication
15 P22/SBO2 O Not used : Data transmission for ATSC tuner communication
16 P23 O Not used : Data request for ATSC tuner communication
17 VDD I +3.3V
18 FOSC O Not used
19 VSS - GND
20 XI I Not used : Low speed oscillator
21 XO O Not used : Low speed oscillator
22 VDD I +3.3V
23 OSCI I Oscillation for system clock (16MHz)
24 OSCO O Oscillation for system clock (16MHz)
25 MODE I Single chip mode for CPU [H: Fixed]
26 TU_POWER O Not used : Power control for tuner
27 P25 - Not used
28 TU_RESET O Reset for tuner [Reset: H]
29 PANORAMA O Not used : Panorama mode for deflection
30 P30/KI0 - Not used
31 P31/KI1 - Not used
32 P32/KI2 - Not used
33 P33/KI3 - Not used
34 AVDD I +3.3V
35 P34/KI4 - Not used
36 P35/KI5 - Not used
37 OCP I B1 over current protect detection [Protection: H]
38 B1_POWER O B1 relay control [Power on: L]
39 LOB_PRO I Low-B protect detection [Protection: H]
40 MECA_SW I Machine SW interrupt detection [SW Pushing: L]
41 MAIN_POW O Main power control [Power on: L]
42 LB_POWER O Low-B power control [Power on: L]
43 VREF- I Reference voltage [GND Fixed]
44 X-RAYPRO I X-ray protect detection [Protection: L]
45 P45/AN5 - Not used
46 KEY2 I Front key scan voltage (CH+, VOL+/-)
47 KEY1 I Front key scan voltage (CH-, MENU)
48 P80/TM14OA - Not used
49 P81/TM14OB - Not used
50 AC_IN I AC 50/60Hz for timer clock
1-6 (No.YA455)
Function Pin
No.
51 ATSC_TX
52 ATSC_RX
53 P85
54 VREF+
55 CONVER_TX
56 CONVER_RX
57 SDA0
58 SCL0
59 P92/TM10IOB
60 P93/TM10IOC
61 AVSS
62 DIGI_PHOT
63 P95/AN1
64 P96/AN2
65 P97/AN3
66 VDD
67 DIGI_PRO
68 P71/SBI0
69 P72/SBO0
70 P73
71 P74/SBI1
72 P75/SBO1
73 SBD5
74 SBT5
75 NMI
76 HDMI_CEC
77 REMOCON
78 V_SYNC
79 IRQ3/PA3
80 POWERGOOD
81 PA5
82 RST
83 VDD
84 SCL1
85 SDA1
86 P02
87 P03
88 P04
89 P05
90 P06
91 P07
92 VSS
93 P10/TM8IOA
94 P11/TM8IOB
95 P12/TM11IOA
96 P13/TM11IOB
97 P14/TM11IC
98 P15/TM12IOA
99 P16/TM12IOB
100 P17/TM12IC
Pin name I/O
I Serial communication for ATSC tuner
O Serial communication for ATSC tuner
- Not used
I Reference voltage [+3.3V Fixed]
I Serial communication for convergence control
O Serial communication for convergence control
I/O I2C bus (data) for EEPROM
O I2C bus (clock) for EEPROM
- Not used
- Not used
- GND
I Photo sensor for DIGITAL-IN illegal copy protection
- Not used
- Not used
- Not used
I +3.3V
O Not used : HDMI control
- Not used
- Not used
- Not used
- Not used
- Not used
I/O On-board writing for flash memory
I On-board writing for flash memory
I +3.3V
O Not used
I Remote control
I V. sync signal
- Not used
I Not used : Power error detection [NG: H]
- Not used
I CPU reset [Reset: L]
I +3.3V
O I2C bus (clock) for RGB & DEF PROCESS (IC301)
I/O I2C bus (data) for RGB & DEF PROCESS (IC301)
- Not used
- Not used
- Not used
- Not used
- Not used
- Not used
- GND
- Not used
- Not used
- Not used
- Not used
- Not used
- Not used
- Not used
- Not used
Function