Sony WX-7700MDX Service Manual page 71

• MAIN BOARD IC550 MB90574CPMT-G-382-BNDE1
(MASTER CONTROLLER (CD MECHANISM CONTROLLER) )
Pin No. Pin Name
1 SP LATCH
2 DSPON
3 DSPLAT
4 DSPRST
5 ATT
6 SYSRST
7 D AUDSEL
8 VCC
9 NCO
10
EE SIO
11
EE CKO
12 RX
13
TX
14 BUSON
15
BEEP
16
TELMUTE
17 UNISI
18 UNISO
19 UNICKO
20 DSPSI
21 DSPSO
22 DSPCKO
23 NCO
24
SIRCS
25 CD SI/TSI
26 CD SO/TSO
27 CD CKO/TCKO
28 DSPPLL
29 DSPMST
30 NCO
31
VOLATT
32
DIVER
I/O
Serial data latch pulse output for spectrum analyzer display to the displayr controller
O
"H" active
O Power on/off control signal output for the CXD2727Q power supply "H": power on
O Serial data latch pulse output to the CXD2727Q
O System reset signal output to the CXD2727Q "L": reset
O Audio line muting on/off control signal output "H": muting on
System reset signal output to the MD mechanism controller, SONY bus interface IC and display
O
controller "L": reset
CD/MD selection signal output to the CD/MD selector "L": CD, "H": MD
O Serial data 24/32 bit slot selection signal output to the CXD2727Q
"L": 24 bit slot, "H": 32 bit slot
— Power supply terminal (+5V)
O
Not used
I/O Two-way data bus with the EEPROM on the tuner unit
O Clock signal output to the EEPROM on the tuner unit
I Input terminal for UART transfer data when writing into flash memory data
O Output terminal for UART transfer data when writing into flash memory data
Bus on/off control signal output for SONY bus to the MD mechanism controller, SONY bus
O
interface IC and display controller "L": bus on
O Beep sound drive signal output terminal "H": beep on
Telephone muting detect signal input terminal
I
At input of "H", the audio signal is attenuated by 20 dB
I Serial data input from the SONY bus interface IC
O
Serial data output to the SONY bus interface IC
Serial clock signal output for the bus interface to the MD mechanism controller, SONY bus
O
interface IC and display controller
I
Serial data input from the CXD2727Q
O
Serial data output to the CXD2727Q
O Serial data transfer clock signal output to the CXD2727Q and display controller
O
Not used
I
SIRCS signal input from the SIRCS controller
I
Serial data input from the uPD63711GC
O
Serial data output to the uPD63711GC
O Serial data transfer clock signal output to the uPD63711GC
MD PLL clock output control signal output to the CXD2727Q
O
At "L" is output: PLCKL (pin ia) is fixed at "L"
At "H" is output: PLCKL (pin ia) output the PLL clock signal
Power on/off controll signal output for the CD/MD selector
"L": power off (tuner on), "H": power on (CD/MD on)
O
Bit clock (BCK) and L/R sampling clock (LRCK) signal master/slave mode selection signal
output to the CXD2727Q "L": master mode, "H": slave mode
O
Not used
O
Muting on/off control signal output to the TDA7402TR "L": muting on
O
Diversity selection signal output terminal Not used
Description
WX-7700MDX
71