System Control - Yamaha CDX-E410 Service Manual

CDX-E410
I SYSTEM CONTROL
1. External Bus
1.1. Physical format of external bus
It is composed of 2 bus lines.
1.2. Format of RX command
RX command is the request of RX to CD unit and the operation button code for CD.
Both are expressed by the remote control code of the NEC format. And the signal wave form is the demodulated
signal of remote control IR signal.
1.3. Format of state info.
State info. is the state information of CD and expressed by the DC voltage level.
Name
PORT_PLAY
PORT_STOP
PORT_PRE_STANDBY
PORT_STANDBY
H: Microprocessor Vcc level
24
MCR-E410
RX command line
RX unit
(RX-E410)
State info. line
Content
DC voltage level
H The period between from playback operation to stop factor generation.
Playback operation: "PLAY" key operation, disc tray hand push close
Stop factor: "STOP", "EJECT", "STANDBY/ON" key operation
Playback contents end
Failsafe stop by abnormal detection
Power on state other than PORT_PLAY state
H x 2/3
The period between from standby operation to standby process
H x 1/3
completion and from CD reset start to initialize process completion
0 Standby state after standby process completion
CD unit
(CDX-E410)