KRF-V7771D/V8881D/VR-2080/2090
15
CIRCUIT DESCRIPTION
Pin No.
Pin Name
I/O
Connect
Description
1
DSP1_RESET
O
P. D.
DSP IC1 (AC-3) RESET
2
DSP3_SS
O
P. U.
DSP IC3 (THX) SLAVE SELECT
3
DSP3_HREQ
I
P. D.
DSP IC3 (THX) HOST REQUEST
4
–
–
GND
–
5
DSP3_RESET
O
P. D.
DSP IC3 (THX) RESET
6
N. C.
I
P. D.
–
7
AVref1
–
+5V
–
8
DSP3_MI
I
P. D.
DSP IC3 (THX) MASTER IN SLAVE OUT
9
DSP3_MO
O
P. D.
DSP IC3 (THX) MASTER OUT SLAVE IN
10
DSP3_CK
O
P. D.
DSP IC3 (THX) CLOCK
11
MDT
I
P. D.
Microprocessor communication MASTER DATA
12
SDT
O
P. D.
Microprocessor communication SLAVE DATA
13
MCK
I
P. D.
Microprocessor communication MASTER CLOCK
14
MREQ
I
P. D.
Microprocessor communication MASTER REQUEST
15
SREQ
O
P. D.
Microprocessor communication SLAVE REQUEST
16
DSP1_MI/DSP2_MI
I
P. D.
DSP IC1, 2 (AC-3, DTS) MASTER IN
17
DSP1_MO/DSP2_MO
O
P. D.
DSP IC1, 2 (AC-3, DTS) MASTER OUT
18
DSP1_CK_DSP2_CK
O
P. D.
DSP IC1, 2 (AC-3, DTS) CLOCK
19~21
NO_MUTE_TIME0~2
I
P. U.
PCM NONE INPUT UNMUTE HOLD TIME SETTING
22~26
N. C.
I
P. U.
–
27
PEAK_LEVEL
O
P. D.
CLIP INDICATOR LED CONTROL
28
WIDE_0
O
P. D.
S-VIDEO WIDE/NORMAL CHANGEOVER CONTROL
(MONITOR OUT)
29~32
WIDE_I0~I3
I
P. D.
S-VIDEO WIDE/NORMAL DETECT0 (VIDEO4~1)
33
Vss
–
GND
–
34
WIDE_I4
I
P. D.
S-VIDEO WIDE/NORMAL DETECT4 (AV AUX)
35~40
N. C.
I
P. D.
–
41
DSP_SEL_DISABLE
O
P. D.
DSP SELECTOR OUTPUT DISABLE (mute)
I
P. D.
–
O
P. D.
INPUT DIGITAL/ANALOG DISTINCTION analog: L, digital: H
I
P. D.
–
O
P. D.
SUB MUTE CONTROL
I
P. D.
–
I
P. D.
2090/2080 MODEL DISTINCTION
O
P. D.
DSP SELECTOR TC74HC CHANGEOVER H: DTS, L: DOLBY
O
P. D.
DSP SELECTOR TC74HC CHANGEOVER H: DTS, L: DOLBY
I
P. D.
CODEC OVER LEVEL/ERROR
O
P. D.
CODEC POWER DOWN
I
P. D.
CODEC FS CHECK1
55
CS_FREQ0
I
P. D.
CODEC FS CHECK0
56
CS_CDIN
O
P. D.
CODEC DATA OUT
57
CS_CS
O
P. D.
CODEC CHIP SELECT
58
CS_CCLK
O
P. D.
CODEC CLOCK
59
CS_CDOUT
I
P. D.
CODEC DATA IN
60
RESET
I
–
RESET
61
CS_AUDIO
I
P. D.
CODEC AUDIO/NON-AUDIO DETECT H: DATA, L: PCM
62
CS_AC3
I
P. D.
CODEC AC-3 H: AC-3 DETECT
63
DSP2_DTS_DTCT
I
P. D.
DSP IC2 (DTS) DTS DETECT H: DTS DETECT
6-2 Pin description
pin
19
20
21
TIME(s)
L
L
L
0
L
L
H
1
L
H
L
2
L
H
H
3
pin
19
20
21
TIME(s)
H
L
L
4
H
L
H
5
H
H
L
6
H
H
H
5
KRF-V7771D(K)
COVER(
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