Samsung DVD-HR755, Service Manual

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Circuit Operating Descriptions
Samsung Electronics 13-5
5) ATAPI Controller
ATAPI (ATA Packet Interface) the standard interface protocol used to connect the CD/DVD Drive to IDE inter
face. Data from the front-end is processed to back-end through this ATAPI protocol. Sanyo chip (LC98600CT-
XB0) is utilized for ATAPI interface. LC98600CT-XB0 has the following features.
!
ECC and EDC correction/addition for CD-ROM data
@
Subcode decoding/encoding
#
Spindle servo control
$
CLV/CAV servo control using ATIP data
%
ATIP decoding and CRC check functions
^
Providing random EFM output for PCA use
&
High-accuracy write strategy signal output enabled (CD-R 52x)
*
Buffer RAM can be accessed by the microcontroller through the LC98600CT-XB0
(
Built-in ATA-PI(IDE) interface (supports Ultra DMA modes 0,1, and 2)
)
52x decoding speed/52x encoding speed supported with 33.8688Mhz
1
Maximum transfer speed PIO mode: 16.6 MB/s (with IORDY), Ultra-DMA: 66MB/s (with DMARQ)
2
User can freely set the CD main channel, C2 flag, and subcode areas in buffer RAM
3
Built-in batch transfer function for transferring (CD main channel, C2 flag, etc., in a single operation)
4
Built-in multi-transfer function (allows multiple blocks to be sent to the host automatically in a single
operation)
FPD,PD,I/V amp
LD,LD Driver
Focus Actuator
Tracking Actuator
TILT Actuator
Sled
Motor Spindle
Motor Tray
Motor
Motor
Driver
PRML
ENDEC
WRITE
STRATEGY
APC & OPC
Miscellaneous
Signal
(DFT/LPP
/WOBBLE)
Servo Error
(FE/TE/CE/PE
SBAD/RC/TILT)
RF Signal
(AGC/EQ)
SERVO
Processor
ECC
Processor
HOST
ATAPI chip
(ZIC1)
MICOM (MIC1)
A.chip (RIC1)
C.chip (CIC1)
D.chip (DIC1)
Pick up
Deck
Fig. 13-5