(No.YA654<Rev.001>)1-7
2.2.2 SUB MICRO COMPUTER (CPU) FUNCTION [SIGNAL PWB: IC2501]
Pin
No.
Pin name I/O Function
1 P9_4 - Not used
2 P9_3 - Not used
3 P9_2 - Not used
4 P9_1 - Not used
5 P9_0 - Not used
6 BYTE I Data bus width select [L fixed]
7 CNVSS I CPU mode select [Normal = L]
8 P8_7 - Not used
9 XRES I Not used
10 RESET I CPU reset [Reset = L]
11 XOUT O Oscillation for system clock
12 VSS - GND
13 XIN I Oscillation for system clock
14 VCC1 - +3.3V power supply
15 NMI I Non-maskable interrupt [H fixed]
16 MCU_RESET2 I
Interrupt detection for 24V power supply [Error = L]
17 POWER_KEY I
Interrupt detection for mecanical POWER SW [On = L]
18 IR_33 I Remote control
19 P8_1 - Not used
20 P8_0 - Not used
21 LED_DIMMING O Brightness control for POWER LED [Bright = H]
22 LED_ON O Lighting for POWER LED [On = H]
23 AC_IN I Not used
24 ILLUMI_ON O Not used
25 VGA_DET I Not used
26 ILL_DIMMING O Not used
27 RX_NF I Not used
28 TX_NF O Not used
29 TXD1 O
Data transmission (serial) for external programming
30 RXD1 I Data receive (serial) for external programming
31 CLK1 I/O Clock for external programming
32 RTS1 O Busy for external programming
33 MCU_TXD O Serial data transmission for main CPU
34 MCU_RXD I Serial data receive for main CPU
35 P6_1 - Not used
36 P6_0 - Not used
37 P5_7 - Not used
38 P5_6 - Not used
39 HOLD I CPU mode select [L fixed]
40 P5_4 - Not used
41 P5_3 - Not used
42 P5_2 - Not used
43 P5_1 - Not used
44 P5_0 - Not used
45 P4_7 - Not used
46 P4_6 - Not used
47 NF_CNTL2 I Not used
48 NF_CNTL1 I Not used
49 P4_3 - Not used
50 P4_2 - Not used
51 EDID_WP O
Programming control for EDID ROM [Protection = H]
52 NF_PPON O Not used
53 NF_OC O Not used
54 DET_NF I Not used
55 PFC_POW O Power on/off control for PFC [On = L]
56 CTL_SW O Not used
57 HP_DET I Not used
58 HP_WDOG I Watch dog reset for main CPU
59 P3_1 - Not used
60 VCC2 - +3.3V power supply
61 P3_0 - Not used
62 VSS - GND
63 RESET_TU O Reset for tuner [Reset = L]
64 VCCH_RST O Reset for Vcch of main CPU [Reset = L]
65
RESET%_TRIDENT
O Reset for main cpu & flash memory [Reset = L]
66
RESET_STV8258
O Not used
67 S_MUTE O Speaker output muting [Muting = H]
68 A_MUTE O Audio line output muting [Muting = H]
69 HP_MUTE O Not used
70 MAIN_POWER O
Power on/off control for main power supply [On = L]
71 P1_7 - Not used
72 P1_6 - Not used
73 P1_5 - Not used
74 BKLT_CNTL O Not used
75 P1_3 - Not used
76 REG_SW1 O Power on/off control for regulator IC [On = H]
77 REG_SW2 O Power on/off control for regulator IC [On = H]
78 REG_SW3 O Power on/off control for regulator IC [On = H]
79 P0_7 - Not used
80 P0_6 - Not used
81 SDA_EEP I/O I
2
C bus (data) for EEPROM
82 SCL_EEP O I
2
C bus (clock) for EEPROM
83 P0_3 - Not used
84 P0_2 - Not used
85 P0_1 - Not used
86 P0_0 - Not used
87 P10_7 - Not used
88 P10_6 - Not used
89 P10_5 - Not used
90 P10_4 - Not used
91 LB_PRO I Low-B protect detection [Error protection = H]
92 P10_2 - Not used
93 KEY2 I Side key scan voltage (MENU/CH+/CH-)
94 AVSS - GND
95 KEY1 I Side key scan voltage (INPUT/VOL+/VOL-)
96 VREF I Reference voltage [H fixed]
97 AVCC - +3.3V power supply
98 P9_7 - Not used
99 P9_6 - Not used
100 P9_5 - Not used
Pin
No.
Pin name I/O Function
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