State transition diagram of CD drive in normal system is shown in Figure 4.1.

Figure 4.1 CD drive state transition diagram (normal system)
(a) After reading the TOC, it will be in the 〈PAUSE〉 state at 2 seconds 0 frame (FAD = 150 = 96H).
(B) During the state transition (on the arrow line), it will be in the 〈BUSY〉 state.
(C) Tray close command refers to a drive command other than tray open.
After the tray is closed, it will transition to the state corresponding to each command.
Example: Play command in 〈OPEN〉 state is in 〈PLAY〉 state after the tray is closed
Become.