Motors And Control Circuits; Figure 31. Simplified Block Diagram-Scorpion 24 Dds-3 Drive; Product Manual - Seagate STD124000N Product Manual

Theory of Operations

Motors and Control Circuits

DC/DC Converter
(5V to 3.3 V)
SRAM
(Dictionary)
SCSI
term.
TOMCAT
(SCSI+compression)
SCSI BUS
8 bit
10 Mbytes/sec
(8)
Figure 31. Simplified Block Diagram—Scorpion 24 DDS-3 Drive

Product Manual

PRML Digital
DRAM
Veterbi ++
1 Meg × 16
(16 MBit)
qty 1 : 2 Mbyte
DRAM Bus
(Bus 3 of 3)
KUKAI
Formatter/ECC 1, 2, 3
Buffer Manager
DDS 1, 2 and 3
D(8)
DMA Bus
(1 of 3)
Processor Bus (Bus 2 of 3)
SRAM
FLASH
(128K × 8)
(256K × 8)
PRML Channel
AMP PONTO2
DBE
PRML Analog
CGA, DIFF,
LVL
GAIN
XLAT
GCA
Silva
Write Driver
D/A
WR/WCK/PBD/PBCK
(8)
Processor
(14 × 20 mm)
Power
Converter
Flying
Rotary
Transformer Preamp
DIFF
TODAY
Motor
(hybrid)
driver chip
Today
digital
Motor
control
driver chip
chip
D/A and
voltage
monitor
ALTO
Motor
(hybrid)
driver chip
Alto
digital
Motor
control
driver chip
chip
Motor
driver chip
Chapter 8
Recording
Heads
Read
Write
Read
Write
Motors
T-reel
motor
S-reel
motor
Sensors
(CYL_PG)
Motors
Cylinder
motor
Capstan
motor
Mode
motor
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