Sherwood RX-772, Service Manual

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3. Pin Function
No. Pin Name Pin Symbol I/O Pin Description
1 P120/INTP0/EXLVI PROTECTION I Input for protection
2 P43 ST/BY_RLY O Output for standby relay
3 P42 SPK_B_RLY O Output for speaker B relay
4 P41 SPK_A_RLY O Output for speaker A relay
5 P40 HP_RLY O Output for headphone relay
6 RESET RESET I Input for u-com reset
7 P124/XT2/EXCLKS NC - Not used
8 P123/XT1 NC - Not used
9 IC/FLMD0 FLMD0 O Port for flash mode setting
10 P122/X2/EXCLK X2 O Output for 20MHz resonator oscillator.
11 P121/X1 X1 I Input for 20MHz resonator oscillator.
12 REGC Connect to ground via 0.47uF/50V E.Cap
13 VSS VSS Ground
14 EVSS EVSS Ground
15 VDD VDD 5.0V
16 EVDD EVDD 5.0V
17 P60/SCLO NC - Not used
18 P61/SDA0 NC - Not used
19 P62/EXSCL0 NC - Not used
20 P63 NC - Not used
21 P33/TI51/TO51/INTP4 RDS_CLK I Clock signal input from BU1924F
22 P77/KR7 RDS_DATA I Input for RDS data from BU1924F
23 P76/KR6 PLL_CE O Chip select output for tuner pack
24 P75/KR5 PLL_DI I Data intput for tuner pack
25 P74/KR4 PLL_CLK O Clock signal output for tuner pack
26 P73/KR3 PLL_DA O Output for tuner control data
27 P72/KR2 PLL_MUTE O Output for tuner mute from tuner pack
28 P71/KR1 MUTE O Output for L/R channel mute
29 P70/KR0 FUN_ST O Strobe Output for TC9273-004
30 P06/TI011/TO01 FUN_CLK O Clock signal Output for TC9273-004
31 P05/TI001/SSI11 FUN_DATA O Output for TC9273-004 control data
32 P32/INTP3 P32 Port for flash upgrade
33 P31/INTP2 P31 Port for flash upgrade
34 P50 PLL_TUNED I Input for tuner "TUNED" condition(L is active)
35 P51 PLL_ST I Input for tuner "STEREO" condition(L is active)
36 P52 VOL_DATA O Output for M61540FP control data
37 P53 VOL_CLK O Clock signal output for M16540FP
38 P30/INTP1 DIGI_LINK I/O Input & output for DIGILINK
39 P17/TI50/TO05 RDS/FLT_ON O Output for RDS/FLT
40 P16/TOH1/INTP5 STBY1 O Ouput for standbyled "orange"
41 P15/TOH0 STBY2 O Ouput for standbyled power on "bule"
42 P14/RXD6 RxD I Input for flash upgrade
43 P13/TXD6 TxD O Output for flash upgrade
44 P12/SO10 FLT_DATA O Output for FLT data
45 P11/SI10/RXD0 NC - Not used
46 P10/SCK10/TXD0 FLT_CLK O Clock signal output for FLT
47 AVREF AVREF 5.0V
48 AVSS AVSS GROUND
49 P27/ANI7 KEY1 I Input for KEY1 scan
50 P26/ANI6 STEP_OPTION I Input for step option
51 P25/ANI5 SET_OPTION I Input set option
52 P24/ANI4 24C08_SCLK O Clock signal output for M24C08
53 P23/ANI3 24C08_SDA O Output for M24C08 data
54 P22/ANI2 FUN_DN I Input for function encoder down
55 P21/ANI1 FUN_UP I Input for function encoder up
56 P20/ANI0 TONE_DN I Input for tone down
57 P130 NC - Not used
58 P04/SCK11 TONE_UP I Input for tone up
59 P03/S111 FLT_RESET O Output for FLT reset(L is active)
60 P02/S011 VOL_DN I Input for volume down
61 P01/TI010/TO00 VOL_UP I Input for volume up
62 P00/TI000 RMC I Input for remocon data
63 P141/BUZ/INTP7 FLT_CE O Chip select output for FLT
64 P140/PCL/INTP6 POWER_DOWN I Input for power down