JVC AV-27F577/R - Page 5

(No.YA387)1-5
2.4 TECHNICAL INFORMATION
2.4.1 MAIN MI-COM (CPU) PIN FUNCTION
Pin
No.
Pin name I/O Function
Pin
No.
Pin name I/O Function
1 M_MUTE O Fixed output muting [Muting : H] 29 YC_GND - GND
2 KEY1 I Front key scan voltage (CH+ / VOL+ / VOL-) 30 V1_IN I Not used
3 KEY2 I Front key scan voltage (CH- / MENU/POWER) 31 ABCL I Current for automatic beam (brightness)/contrast limit
4 uP_DVss - GND 32
MONITOR_OUT O Not used
5 Reset I CPU reset [Reset: L] 33 BLACK_DET - Black level detection filter
6 8MHz_OUT O CPU system clock: 8MHz oscillation 34 SVM_OUT O Y signal for scan velocity scan modulation
7 8MHz_IN I CPU system clock: 8MHz oscillation 35 APL_FIL - Average picture level filter
8 TEST - GND 36 APC_FIL - Automatic phase control filter
9 uP_DVDD I 5V 37 fsc_OUT O Not used
10 TU_RESET O Reset for digital tuner module [Reset : H] 38 YC_Vcc I 5V (for video process circuit)
11 uP_VVSS - GND 39 R_OUT O R signal for CRT output
12 TV_HGND - GND 40 G_OUT O G signal for CRT output
13 FBP_SCP I Flyback pulse (H. pulse) 41 B_OUT O B signal for CRT output
14 HOUT O H. drive (oscillation) 42 RGB_Vcc I 9V (for RGB process circuit)
15 H_Vcc I 9V (for H. oscillation start) 43 IK_IN I Not used
16 HAFC_1 - H. AFC filter 44 TV_DGND - GND
17 Vsaw - V. saw filter 45 uP_AGND - GND
18 VOUT O V. drive 46 uP_AVdd - 5V
19 EW_OUT O Parabola waveform (for sidepin correection) 47 MAIN_POWER O Power on/off switching control [Powen on: L]
20 X-RAY I
Not used: X-ray detection (for protection) [Detection : H]
48 DTVM_REQ I Read request from DTV micom [Request : H]
21 Ys I Not used 49 SDA1 I/O Data for Inter IC control bus (for DTV micom)
22 Cb_IN I Cb (external) signal 50 SCL1 O Clock for Inter IC control bus (for DTV micom)
23 Y_IN I Y (external) signal 51 SDA0 I/O Data for Inter IC control bus (for main memory)
24 Cr_IN I Cr (external) signal 52 A_MUTING O Audio output muting [Muting : H]
25 TV_DVcc I 3.3V 53 SCL0 O Clock for Inter IC control bus (for main memory)
26 V3IN/CIN I Not used 54 AC_IN I AC 50/60Hz input for timer clock
27 EHT_IN I HV change control 55 REMOCON I Remote control sensor input [No input : H]
28 V2_IN/Y_IN I Not used 56 LED O POWER / ON TIMER LED lndication [lighting : L]