Yamaha MCR-730, Service Manual

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39
DRX-730/NX-E700
DRX-730/NX-E70
0
No. Function Name Port Name I/O Detail of Function
1 P96 I/O Pulldown
2 P95 I/O Pulldown
3 XREADY P94 O DVD module I/F ready signal output
4 XDVDRST P93 O DVD module I/F reset output
5 DVDPOWER P92 O
DVD module HDMI power supply ON/OFF output
(H: power on, L: power off)
6 iPod_PRT P91 I
PS protection detection for iPod power source
(H: when normal, L: when abnormal)
7 P90 I Pulldown
8 BYTE – When in single chip mode: VSS (GND)
9 CNVSS –
Processor mode selection
Lo: single chip mode, Hi: to flash built-in boot mode
When resetting hardware:
to boot mode with P50=H, P55=L, CNVss=H settings
* Pulldown
required
10 XCIN P87 – Clock oscillation input for clock
11 XCOUT P86 – Clock oscillation output for clock
12 RESET – RESET [L: RESET]
13 XOUT – 16MHz OUT
14 VSS – GND
15 XIN – 16MHz IN
16 VCC1 – Power 5V
17 NMI P85 I Connect to Vcc via resistor
18 DVD_ACK P84 INT-IN DVD module I/F ACK interrupt (H: communication started)
19 PDET P83 INT-IN Power shutoff detection interrupt (L: shutoff)
20 AMP_PRT P82 INT-IN
D-AMP protection detection (OCP)
(H: when abnormal, L: when normal)
21 AMP_MODE P81 O D-AMP reset (H: when usual, L: when resetting)
22 AMP_CLK P80
TMR-
OUT
D-AMP clock for separate oscillation (300KHz and 350KHz)
23 AMP_MT P77 I/O D-AMP mute control (Hiz: mute off, L: mute on)
24 AMP_CKSEL P76 O
D-AMP self oscillation ON/OFF
(H: separate oscillation, L: self oscillation)
25 SCL_EEP P75 O EEPROM 12C SCL output for backup
Pullup to
EEPROM
power supply
26 FILAMENT P74
TMR-
OUT
For FL filament (62.7KHz/PWM)
27 /INH_RECA P73 OUT AUX record inhibit output (L: inhibited, H: permitted)
28 SDA_EEP P72 OUT EEPROM 12C SDA input/output for backup
Pullup to
EEPROM
power supply
29 iPod_RX P71 S-IN iPod RxD
30 iPod_TX P70 S-OUT iPod TxD Pullup required
31 TXD P67 Tx Data transmission terminal for Flash writing
32 RXD P66 Rx Data reception terminal for Flash writing
33 SCLK P65 S-CLK Clock terminal for Flash writing
34 BUSY P64 O BUSY output for Flash writing
35 SDATA P63 S-OUT DVD module I/F data output
36 MDATA P62 S-IN DVD module I/F data input
37 DVD_SCLK P61 S-CLK DVD module I/F clock input
38 iPod_PDET P60 I iPod accessory power detection
39 TEST P57 O For debugging (CLKOUT: sub-clock output check) Pulldown
40 iPod_DET P56 I iPod detection