LC78616PE Datasheet, PDF (12/26 Pages) ON Semiconductor – Compact Disc Player IC

LC78616PE
Host interface
The four wires serial interface is available as the data transmission protocol between this LSI and Host controller.
It is able to know whether the internal sequencer could receive the command or not by the BUSYB pin.
BUSYB
Low
High
Command Acceptance situation
All address command access disable
All address command access disable except A0h to A7h addresses
BUSYB becomes Low if the A5h address command is transmitted.
All address command except A0h to A7h addresses will be ignored.
By setting REG_READY command to High, internal register open mode is available. In this mode, Host controller
can access to the all address command (internal sequencer can’t control the CDDSP block). When the A5h address
command is transmitted, REG_READY command and BUSYB pin is set to Low, and internal register open mode
become finish.
 Command Transfer Timing 1 : (Normal mode: BUSYB = "H" → "L")
Tcsu
CE
Twl
CL
Twh
DI
Trsu
BUSYB
Twsu
Twhd
Tchd
Trdyoff
Trdyon
 Command Transfer Timing 2 : (Internal register open mode: BUSYB = "H")
Tchd
Tcsu
CE
Twl
Tce
CL
Twh
DI
Trsu
BUSYB
Twsu
Twhd
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