Yamaha DSP-AX1/RX-V1 Service Manual page 45

IC2 : YSD917 (P.C.B. DSP)
DIR5 (Digital Format Interface Receiver)
AVDD
1 28
PCO 2 27
AVSS
3 26
M/S
4 25
DDIN
5 24
TEST 6 23
/IC
7 22
VSS
8 21
XO 9 20
XI
10 19
MCK
11 18
VDD
12 17
SDO 13 16
SDBCK
14 15
No. Name I/O
1 AVDD Analog power supply for PLL (+5V)
2 PCO A PLL filter connecting terminal
3 AVSS Analog ground
4 M/S Is+ Master/slave mode selection
5 DDIN Is Digital audio interface data input
6 TEST Is+ Test terminal (to be open)
7 /IC Is Initial clear input
8 VSS Ground
9 XO O 24.576MHz crystal oscillator connecting terminal (output)
10 XI I 24.576MHz crystal oscillator connecting terminal (input)
11 MCK O 12.288MHz clock output terminal
12 VDD +5V power supply
13 SDO O Serial data output
14 SDBCK Is/O Serial data bit clock input/output 64fs
15 SDWCK I/O Serial data word clock input/output fs
16 SDMCK O Serial data master clock output 256fs or 128fs
17 VSS Ground
18 SYNC/U O Serial data synchronous timing output / user data output
19 FS128/C O Serial data master clock 128fs output / channel status output
20 DBL/V O Double rate clock output / validity flag output
21 ERR/BS O Data error detect output / block start output
22 /LOCK O PLL lock detect output
23 INT O Interrupt output
24 VDD +5V power supply
25 /CS I Microprocessor interface chip select input
26 SO Ot Microprocessor interface data output
27 SI I Microprocessor interface data input
28 SCK Is Microprocessor interface bit clock input
Is: Schmidt trigger input terminal
I+: Input terminal with pull-up resistor
O: digital output terminal
Ot: Tri-state digital output terminal
A: Analog terminal
With SYNC/U, FS128, DBL/V and ERR/BS, select each function by setting the control register.
SCK
SI
SO
/CS
VDD
INT
DDIN
5
/LOCK
ERR/BS
DBL/V
FS128/C
SYNC/U
/IC 7
VSS
SDMCK
SDWCK MICROPROCESSOR
INTERFACE
26
22 2 10 9 11
STANDARD
CLOCK
CLOCK
GENERATION
PLL
SYSTEM
SELECTION
DATA BUS FRAME SERIAL
BUFFER CONVERSION
EACH CONTROL
SIGNAL
CHANNEL INTERRUPT
STATUS FACTOR
USER DATA DETECTION
25 27 28
Function
DSP-AX1/RX-V1
4
16 SDMCK
OUTPUT
SDWCK
15
CLOCK
SDBCK
14
GENERATION
SYNC/U
18
FS128/C
19
OUTPUT
SELECTION
20 DBL/V
ERR/BS
21
13 SDO
23
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