Yamaha DSP-A5 Service Manual page 27

IC4 : YSS918D-F (AC3D2av)
DSP + AC-3(Dolby Digital)/ Pro Logic/ DTS Digital Surround Decoder
No. Name I/O
51 VDD2
52 NONPCM O
53 CRC O
54 MUTE O
55 KARAOKE O
56 SURENC O
57 /SDBCK0 O
58 RAMA6 O
59 RAMA5 O
60 VSS
61 RAMA4 O
62 /IC I
63 TEST
64 RAMA3 O
65 /CSB I
66 /CS I
67 SO O
68 SI I
69 SCK I
70 RAMA2 O
71 VDD1
72 RAMD0 I/O
73 RAMD1 I/O
74 RAMD2 I/O
75 RAMD3 I/O
76 RAMD4 I/O
77 RAMD5 I/O
78 RAMD6 I/O
79 RAMD7 I/O
80 VSS
81 VDD2
82 SDWCK0 I
83 SDBCK0 I
84 SDIA0 I
85 SDIA1 I
86 RAMA1 O
87 RAMA0 O
88 RAMWEN O
89 RAMOEN O
90 VSS
91 VDD
92 IPORT7 I
93 IPORT6 I
94 IPORT5 I
95 IPORT4 I
96 IPORT3 I
97 IPORT2 I
98 IPORT1 I
99 IPORT0 I
100 VSS
+3V power supply
Non-PCM data output terminal, non-PCM data detect output
CRC output terminal (normally unconnected)
Mute output terminal, connected to external microcomputer data mute detect input
Karaoke output terminal (normally unconnected)
Surround encoder output terminal (normally unconnected)
Inverted signal of serial data bit clock output terminal 0 (normally unconnected)
RAM address output terminal 6, connected to external 1M SRAM address
RAM address output terminal 5, connected to external 1M SRAM address
Ground
RAM address output terminal 4, connected to external 1M SRAM address
Initial clear input terminal, connected to external output port expantion IC initial clear output
Test terminal (normally unconnected)
RAM address output terminal 3, connected to external 1M SRAM address
Chip select B input terminal,connected to external microcomputer chip enable output 2
Chip select input terminal, connected to external microcomputer chip enable output 1
Serial data output terminal, connected to external microcomputer serial data input
Serial data input terminal, connected to external microcomputer serial data output
Serial clock input terminal, connected to external microcomputer serial clock output
RAM address output terminal 2, connected to external 1M SRAM address
+5V power supply
RAM data bus terminal 0, connected to external 1M SRAM data
RAM data bus terminal 1, connected to external 1M SRAM data
RAM data bus terminal 2, connected to external 1M SRAM data
RAM data bus terminal 3, connected to external 1M SRAM data
RAM data bus terminal 4, connected to external 1M SRAM data
RAM data bus terminal 5, connected to external 1M SRAM data
RAM data bus terminal 6, connected to external 1M SRAM data
RAM data bus terminal 7, connected to external 1M SRAM data
Ground
+3V power supply
Serial data word clock input terminal 0, connected to external DIR5 1fs word clock output
Serial data bit clock input terminal 0, connected to external DIR5 64fs bit clock output
Serial data input A terminal 0, AC-3/DTS bit stream (or PCM) data input, connected to external DIR5
audio data output
Serial data input A terminal 1, connected to external CODEC audio data output
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 expansion port terminal 7, DVD coaxial/optical select
Input expansion port terminal 6, DBS coaxial/optical select
Input expansion port terminal 5 (normally connected to ground)
Input expansion port terminal 4, digital sampling frequency select (H:96kHz, L:Non 96kHz)
Input expansion port terminal 3, Front mix select (H: Outside, L: Inside)
Input expansion port terminal 2, RF select (H: Exist, L:None)
Input expansion port terminal 1, DTS select (H: DTS (YSS918), L: Non DTS (YSS908))
Input expansion port terminal 0, SRAM select (H: 1M, L: 256k)
Ground
Function
DSP-A5
26