Sony STR-DE845 service manual • DIGITAL BOARD IC1401 CXD2712R AUDIO DSP

• DIGITAL BOARD IC1401 CXD2712R (AUDIO DSP)

Pin No.			Pin Name	I/O		Description
1			VSS3	—	Ground terminal
2 to	5		SOA to SOD	O	Serial data output to the A/D, D/A converter
6, 7			ECJ0, ECJ1	I	Conditional jump input terminal (fixed at “L” in this set)
8			NC	O	Not used (fixed at “L”)
9			XHDWR	I	Write data input from the system controller (IC1201)
10			XHDRD	I	Read data input terminal Not used (fixed at “H”)
11			VSS4	—	Ground terminal
12			VDD2	—	Power supply terminal (+3.3V)
13			HRDY	O	Ready signal output to the system controller (IC1201)
14			XHDCS	I	Chip select signal input from the system controller (IC1201)
15			HA0	I	Address signal input from the system controller (IC1201)
16 to	20		HD0 to HD4	I/O	Two-way data bus with the system controller (IC1201)
21			VSS5	—	Ground terminal
22			VDD3	—	Power supply terminal (+3.3V)
23 to	25		HD5 to HD7	I/O	Two-way data bus with the system controller (IC1201)
26			XRST	I	Reset signal input from the system controller (IC1201)		“L”: reset
27 to	30		FGP0 toFGP3	I/O	Data output terminal for the test
31			VSS6	—	Ground terminal
32 to	40		ED0 to ED8	I/O	Two-way data bus with external RAM	Not used (fixed at “L”)
41			VSS7	—	Ground terminal
42			VDD4	—	Power supply terminal (+3.3V)
43 to	49		ED9 to ED15	I/O	Two-way data bus with external RAM	Not used (fixed at “L”)
50			TEST	I	Test terminal (Normally: fixed at “L”)
51			VSS8	—	Ground terminal
52			VDD5	—	Power supply terminal (+3.3V)
53 to	60	ED16 to ED23		I/O	Two-way data bus with the S-RAM (IC1402)
61			VSS9	—	Ground terminal
62 to	69	ED24 to ED31		I/O	Two-way data bus with the S-RAM (IC1402)
70			XOE	O	Output enable signal output to the S-RAM (IC1402)
71			VSS10	—	Ground terminal
72			VDD6	—	Power supply terminal (+3.3V)
73			CAS	O	External RAM column address strobe signal output terminal Not used
74			XWE	O	Write enable signal output to the S-RAM (IC1402)
75			RAS	O	External RAM raw address strobe signal output terminal		Not used
76 to	80		EA0 to EA4	O	Address signal output to the S-RAM (IC1402) or test data input from the S-RAM (IC1402)
81			VSS11	—	Ground terminal
82			VDD7	—	Power supply terminal (+3.3V)
83 to	89		E5 to EA11	O	Address signal output to the S-RAM (IC1402) or test data input from the S-RAM (IC1402)
90			EA12	O	Address signal output to the S-RAM (IC1402)
91			VSS0	—	Ground terminal
92 to	94	EA13 to EA15		O	Address signal output to the S-RAM (IC1402)
95			EA16	O	Address signal output terminal (for check)
96			TSTA	I	Test data input terminal (Normally: fixed at “L”)
97			PLDIVF	I	PLL input frequency select terminal	“L”: 256fs “H”: 128fs (fixed at “L” in this set)
98			PLDIVB	O	PLL input frequency select terminal	“L”: 768fs “H”: 1024fs (fixed at “H” in this set)

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