Sony Ericsson XR-C7500RX service manual IC PIN Function Description, Pin No Pin Name Description

7-16. IC PIN FUNCTION DESCRIPTION

•MAIN BOARD IC100 CXD2726Q-4 (DIGITAL SIGNAL PROCESSOR, DIGITAL FILTER, D/A CONVERTER)

Pin No.		Pin Name	I/O		Description
1		VSS1	—	Ground terminal (digital system)
2 to 15		T.P	I	Input terminal for the test (fixed at “L”)
16 to 21	TST0 to TST5		I	Input terminal for the test (fixed at “L”)
22 to 24	JPE1 to JPE3		I	External condition jump terminal	“H”: condition jump (fixed at “L”)
25		VDD1	—	Power supply terminal (+3.3V) (digital system)
26		AVS3	—	Ground terminal (for D/A converter 1) (analog system)
27		AOUTL1	O	D/A converter 1 (L-ch side) output terminal
				Analog signal output for front side (L-ch side) output in this set
28		AVD3	—	Power supply terminal (+3.3V) (for D/A converter 1) (analog system)
29		AOUTR1	O	D/A converter 1 (R-ch side) output terminal
				Analog signal output for rear side (L-ch side) output in this set
30		AVD5	—	Power supply terminal (+3.3V) (for D/A converter 1) (analog system)
31		AVS5	—	Ground terminal (for D/A converter 1) (analog system)
32		AVD1	—	Power supply terminal (+3.3V) (for L-ch side A/D converter) (analog system)
33		AVS1	—	Ground terminal (for L-ch side A/D converter) (analog system)
34		LREF	O	Connected to the bus control for A/D converter (for L-ch side)
35		LIN	I	A/D converter (L-ch side) analog input terminal
				Tuner and bus audio input signal (L-ch side) in this set
36		AVS7	—	Ground terminal (for D/A converter 2) (analog system)
37		AVD7	—	Power supply terminal (+3.3V) (for D/A converter 2) (analog system)
38		AOUTL2	O	D/A converter 2 (L-ch side) output terminal		Not used (open)
39		AVDX	—	Power supply terminal (+3.3V) (for master clock) (analog system)
40		XTLO38	O	System clock output terminal (16.9344 MHz)
41		XTLI38	I	System clock input terminal (16.9344 MHz)
42		AVSX	—	Ground terminal (for master clock) (analog system)
43		AOUTR2	O	D/A converter 2 (R-ch side) output terminal		Not used (open)
44		AVD8	—	Power supply terminal (+3.3V) (for D/A converter 2) (analog system)
45		AVS8	—	Ground terminal (for D/A converter 2) (analog system)
46		RIN	I	A/D converter (R-ch side) analog input terminal
				Tuner and bus audio input signal (R-ch side) in this set
47		RREF	O	Connected to the bus control for A/D converter (for R-ch side)
48		AVS2	—	Ground terminal (for R-ch side A/D converter) (analog system)
49		AVD2	—	Power supply terminal (+3.3V) (for R-ch side A/D converter) (analog system)
50		AVS6	—	Ground terminal (for D/A converter 3) (analog system)
51		AVD6	—	Power supply terminal (+3.3V) (for D/A converter 3) (analog system)
52		AOUTL3	O	D/A converter 3 (L-ch side) output terminal
				Analog signal output for rear side (R-ch side) output in this set
53		AVD4	—	Power supply terminal (+3.3V) (for D/A converter 3) (analog system)
54		AOUTR3	O	D/A converter 3 (R-ch side) output terminal
				Analog signal output for front side (R-ch side) output in this set
55		AVS4	—	Ground terminal (for D/A converter 3) (analog system)
56		VSS2	—	Ground terminal (digital system)
57		XRST	I	System reset signal input from the system controller (IC600) “L”: reset
58		BFOT	O	Master clock signal output terminal	Not used (open)
59		SCK	I	Serial data transfer clock signal input from the system controller (IC600) and liquid crystal
				display drive controller (IC800)

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