MN66279RSC Datasheet, PDF (10/96 Pages) Panasonic Semiconductor – LSI FOR COMPACT DISC/CD ROM PLAYER

MN662790RSC
7-0. Contents of functions amended from MN662748
7-0 (1) Digital servo section
1) Initialization
˕ Initialization with SYS command after the standby time (0.1 s) preset by the on-chip timer has
elapsed
2) Automatic adjustment
ɾ Abolishment of Tr offset external feedback adjustment
ɾ Fo/Tr offset adjustments batch processing only
ɾ Setting of the convergence gain for Fo balance adjustment
ɾ Abolishment of Tr rough gain adjustment with TROFF
ɾ Selection of the convergence conditions for Tr balance adjustment
˕ Hunting preventive function in Fo balance adjustment
(1/8, 1/4, 1/32, 1/16)
3) Servo
˕ Servo sampling frequency: 44.1 kHz
˕ Vibration detection with software
ɾ TRV dead-zone amplifier mode selectable
ɾ Unified Tr servo output (TRD and KICK)
ɾ Unified TRV servo output (TVD and TRV)
ɾ TVD output gain selectable
ɾ Fo servo filter Z^-N setting
(N: Fixed to 2)
ɾ Selecting Fo servo dropout processing
(0 mute only)
ɾ Selecting Fo disc detecting frequency
(5.4 Hz, 2.6 Hz)
ɾ Tr servo output stage noise shaver ON/OFF
(Fixed to ON)
ɾ Selecting Tr servo dropout processing
(0 mute only)
ɾ Selecting TRV loop filter
(Type A only)
ɾ Smoothing TRV servo output
ɾ OFT input noise filter turned ON/OFF with a command
˕ Setting of high-speed Fo pull-in operation when turning Fo ON from OFF state
˕ Setting of dropout processing during KICK operation
˕ Trigger function at vibration detection
ɾ Abolishment of Fo servo's perfect integral and limited characteristics selection (Perfect integral
characteristic only)
ɾ Abolishment of Tr servo's perfect integral and limited characteristics selection (Perfect integral
characteristic only)
ɾ Change of servo parameter exponent part format (FEXP, TEXP)
4) Access
ɾ TCNT (track count move) processing with software
ɾ Outputting TRD during TCNT (track count move) (0 only)
5) DTMS, DTSM
ɾ Possible to set Tr gain constant limiter arbitrarily for initial Tr gain constant and Tr fine gain
adjustments
ɾ Possible to set Fo gain constant limiter arbitrarily for initial Fo gain constant and Fo fine gain
adjustments
˕ Possible to set band-pass filter constants and a detecting level for vibration detection
SDD00025AEM
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