Yamaha MCX-C15 Service Manual page 30

MCX-C15/MCX-CA15
IC201 : µPD789022GB
CPU
Pin No. Pin Name
1 P12
2 P11
3 P10
4 P47
5 P46
6 P45/KR5
7 P44
8 P43/KR3
9 P42/KR2
10 P41/KR1
11 P40/KR0
12 NC
13 IC (Vpp)
14 X2
15 X1
16 Vss0
17 Vdd0
18 /RESET
19 P53
20 P52
21 P51/TO2
22 TO0
23 INTP2/P32/CPT2
24 INTP1/P31
25 INTP0
26 SI0
27 SO0
28 /SCK0
29 P07
30 P06
31 P05
32 P04
33 P03
34 P02
35 P01
36 P00
37 NC
38 Vdd1
39 Vss1
40 P17
41 P16
42 P15
43 P14
44 P13
Operation Mode Setting
Signal Name MODE A
MODE 1
MODE 2
SENSE_IN OFF
N_CTRL_IN OFF
N_CTRL_OUT H/L
IR_CARRIER H/L
30
I/O
I Operation Mode discrimination
I Operation Mode discrimination
I CONTROL input signal (rear jack)
O CONTROL output signal
I Audio input signal detection
O –
O For through output of P46 signal (for inspection)
O –
O –
O –
O –
– –
I Power supply for rewriting FLASH
– For connection of main system clock
I For connection of main system clock
– Ground for port section
– Power supply for port section
I For resetting system
I AUX_IN detect signal (H: AUDIO_IN, L: AV_IN)
O –
O –
O IR career output (30k to 100kHz)
O –
O –
I Remote control / command input signal from C15
I FLASH writer serial data
O FLASH writer serial data
I FLASH writer serial clock
O ACK signal to CONTROL_UNIT
O Electronic volume chip select
O Electronic volume serial data
O Electronic volume serial clock
O AUDIO_OUT output MUTE signal (H: MUTE ON, L: MUTE OFF)
O Sub_Woofer and D_AMP output MUTE signal (H: MUTE ON, L: MUTE OFF)
O YDA-135 SLEEP control signal (H: SLEEP ON, L: SLEEP OFF)
O Speaker relay control signal (H: Relay ON, L: Relay OFF)
– –
– Power supply for other than port section
– Ground for other than port section
O LED control signal for power supply (H: LED_ON, L: LED_OFF)
O LED dim control signal for power supply (H: Normal, L: Dim)
I D_AMP protection signal (H: Protection detect, L: Normal state)
I Product identify signal (H: CA15, L: I/O box)
I Manual reset discrimination when an abnormality has occurred (H: Normal, L: Manual reset)
MODE B
H H
L H
H/L
OFF
H/L
OFF
MCX-CA15
Function