Sherwood RX-772 Service Manual page 11

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