Yamaha CD-C600 - Microprocessor Pin Functions (51-80); A;D Port Key Detection

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CD-C600
CD-C600
Pin No. Function Name I/O Detail of Function
51 DSP_/RST O Reset signal to CD-DSP
52 REG_READY0 I Input R_RDY signal from CD-DSP
53 SUB_READY0 I Input S_RDY signal from CD-DSP
54 KEY_O/C I Detect [O/C] KEY on front-panel
55 KEY_USB I Detect [CD/USB] KEY on front-panel
56 KEY_PLAY I Detect [PLAY/PAUSE] KEY on front-panel
57 POFF_detect I Detect PRIMARY_POWER_OFF condition
58 KEY_0 I Detect KEY_0 signal on front-panel
PlayXchang, STOP, SKIP+
59 KEY_1 I Detect KEY_1 signal on front-panel
SKIP-, Pure direct, DISC5
60 KEY_2 I Detect KEY_2 signal on front-panel
DISC1, DICS2, DISC3, DISC4
61 D33 Detect I Reserved (Detect D+3.3)
62 OPU_SEL I Input the signal to select OPU
0V : CD traverse 3.3V : DVD/CD traverse
1.65V : DVD/CD traverse
63 DRV_MUTE O Mute control to actuator driver (IC1) Low --> Muting output on actuator driver
64 LIMIT_SW I Detect inner position SW on CD-traverse mechanism
65 MON_1 I Input FMON0 (defect) signal from CD-DSP (IC2)
66 MON_2 I Input FMON1(FSEQ) signal from CD-DSP (IC2)
67 N.C.
68 N.C.
69 N.C.
70 LED_POWER O Control LED_POWER on front-panel
71 LED_PDIRECT O Control LED_PURE DIRECT on front-panel
72 LED_USB1 O Control LED_USB (orange) on front-panel
73 LED_USB2 O Control LED_USB (green) on front-panel
74 N.C.
75 VSS/AVSS GND DGND
76 SLED_CTL O Reserved
77 VREF Power Input the reference voltage (D+3.3V) for A/D port (pin 58–60, pin 62)
78 VCC/AVCC Power Input S+33
79 STBY O Relay control on primary power High --> Primary power relay is ON
80 EEP_SCL O Serial clock to EEPROM (IC304)
Key detection for A/D port
Key input (A/D) pull-up resistance 10 k-ohms
Ohm 0 +820 +3.3 k +12.0 k
V 0 0.2–0.3 0.9–1.0 2.0–2.1
A/D value (3.3 V = 255) 0 15–25 70–78 153–162
KEY0 (58 pin) — PLAY X CHANGE STOP SKIP +/SEARCH +
KEY1 (59 pin) — SKIP -/SEARCH - PURE DIRECT DISC 5
Ohm 0 +100 +3.3 k +6.8 k +22.0 k
V 0 0.03-0.1 0.8–0.9 1.65–1.75 2.45–2.55
A/D value (3.3 V = 255) 0 3–7 60–70 125–135 190–200
KEY2 (60 pin) — DISC 4 DISC 3 DISC 2 DISC 1
Ohm 0
V0
A/D value (3.3 V = 255) 0
KEY_O/C (54 pin) OPEN/CLOSE
KEY_USB (55 pin) CD/USB
KEY_PLAY (56 pin) PLAY/PAUSE