Read Harman Kardon AVR 134 Service Manual online
11
3. Pin Functions
No.
Pin Name
Pin Symbol
I/O
Pin Description
1
P120/INTP0/EXLVI
PROTECTION
I
Input for protection
2
P43
VOL_UP
I
Input for volume up
3
P42
VOL_DN
I
Input for volume down
4
P41
H/P_RLY
O
Output for headphone relay
5
P40
C_RLY
O
Output for center speaker relay
6
RESET
RESET
I
Input for u-com reset
7
P124/XT2/EXCLKS
S_RLY
O
Output for surround speaker relay
8
P123/XT1
F_RLY
O
Output for front speaker relay
9
IC/FLMD0
FLMD0
O
Port for flash mode setting
10
P122/X2/EXCLK
V1 OUT_MUTE
O
Output for VIDEO1 OUT MUTE
11
P121/X1
TRIG CONTROL
O
Output for DC TRIGGER ON/OFF
12
REGC
Connect to ground via 0.47uF/50V E.Cap
13
VSS
VSS
Ground
14
EVSS
EVSS
Ground
15
VDD
VDD
3V3
16
EVDD
EVDD
3V3
17
P60/SCLO
VIDEO_MUTE
O
Output for video mute
18
P61/SDA0
VIDEO_S1/HDMI_S2
O
Output for video/HDMI function IC switching
19
P62/EXSCL0
VIDEO_S2/HDMI_S1
O
Output for video/HDMI function IC switching
20
P63
TUNED
I
Input for tuner "TUNED" condition (L is active)
21
P33/TI51/TO51/INTP4
RDS_CLK
I
Clock signal input from tuner pack
22
P77/KR7
RDS_DATA
I
Input for RDS data from tuner pack
23
P76/KR6
PLL_CE
O
Chip select output for tuner pack
24
P75/KR5
PLL_DO
O
Data output for tuner pack
25
P74/KR4
SW_MUTE
O
Output for subwoofer channel mute
26
P73/KR3
C_MUTE
O
Output for center channel mute
27
P72/KR2
S_MUTE
O
Output for surround channel mute
28
P71/KR1
F_MUTE
O
Output for front channel mute
29
P70/KR0
USB_PC
O
Output for IC108(REGULATOR) ON/OFF
30
P06/TI011/TO01
R2A1521FP_CLK
O
Clock signal output for R2A1521FP
31
P05/TI001/SSI11
R2A1521FP_DATA
O
Output for R2A1521FP control data
32
P32/INTP3
P32
Port for flash upgrade
33
P31/INTP2
P31
Port for flash upgrade
34
P50
DSP/DIR_CCLK
O
Clock signal output for DIR/DSP
35
P51
DSP/DIR_CDIN
I/O
Input & output for DIR/DSP control data
36
P52
DSP_RESET
O
Output for DSP reset
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