Yamaha DSP-A595a Service Manual - page 35
28
DSP-A595a
IC4 : YSS918D-F (AC3D2av)
DSP + AC-3 (Digital Dolby)/Pro Logic/DTS Digital Surround Decoder
51
VDD2
+3V power supply
52
NONPCM
O
non-PCM data output terminal, non-PCM data detect
53
CRC
O
CRC output terminal (normally unconnected)
54
MUTE
O
Mute output terminal, output data mute detect
55
KARAOKE
O
Karaoke output terminal (normally unconnected)
56
SURENC
O
Surround encoder output terminal (normally unconnected)
57
/SDBCK0
O
Inverted signal of serial data bit clock output terminal 0 (normally unconnected)
58
RAMA6
O
RAM address output terminal 6, connected to external 1M SRAM address
59
RAMA5
O
RAM address output terminal 5, connected to external 1M SRAM address
60
VSS
Ground
61
RAMA4
O
RAM address output terminal 4, connected to external 1M SRAM address
62
/IC
I
Initial clear input terminal
63
TEST
Test terminal (normally unconnected)
64
RAMA3
O
RAM address output terminal 3, connected to external 1M SRAM address
65
/CSB
I
Chip select B input terminal,coefficient and program RAM chip select signal input
66
/CS
I
Chip select input terminal, microprocessor interface chip select signal input
67
SO
O
Serial data output terminal, microprocessor interface serial data output
68
SI
I
Serial data input terminal, microprocessor interface and coefficient and program RAM serial data input
69
SCK
I
Serial clock intput terminal, microprocessor interface and coefficient and program RAM serial clock input
70
RAMA2
O
RAM address output terminal 2, connected to external 1M SRAM address
71
VDD1
+5V power supply
72
RAMD0
I/O
RAM data bus terminal 0, connected to external 1M SRAM data
73
RAMD1
I/O
RAM data bus terminal 1, connected to external 1M SRAM data
74
RAMD2
I/O
RAM data bus terminal 2, connected to external 1M SRAM data
75
RAMD3
I/O
RAM data bus terminal 3, connected to external 1M SRAM data
76
RAMD4
I/O
RAM data bus terminal 4, connected to external 1M SRAM data
77
RAMD5
I/O
RAM data bus terminal 5, connected to external 1M SRAM data
78
RAMD6
I/O
RAM data bus terminal 6, connected to external 1M SRAM data
79
RAMD7
I/O
RAM data bus terminal 7, connected to external 1M SRAM data
80
VSS
Ground
81
VDD2
+3V power supply
82
SDWCK0
I
Serial data word clock input terminal 0
83
SDBCK0
I
Serial data bit clock input terminal 0
84
SDIA0
I
Serial data input A terminal 0, AC-3/DTS bit stream (or PCM) data input
Serial data input A terminal 1 (normally connected to ground)
RAM address output terminal 1, connected to external 1M SRAM address
RAM address output terminal 0, connected to external 1M SRAM address
RAM write enable output terminal, connected to external 1M SRAM write enable
RAM output enable output terminal, connected to external 1M SRAM output enable
Ground
+3V power supply
Input port terminal 7 (normally connected to ground)
Input port terminal 6 (normally connected to ground)
Input port terminal 5 (normally connected to ground)
95
IPORT4
I
Input port terminal 4 (normally connected to ground)
96
IPORT3
I
Input port terminal 3 (normally connected to ground)
97
IPORT2
I
Input port terminal 2 (normally connected to ground)
98
IPORT1
I
Input port terminal 1 (normally connected to ground)
99
IPORT0
I
Input port terminal 0 (normally connected to ground)
No.
Name
I/O
Function
100
VSS
Ground
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