User's Manual

Chapter 7 Theory of operations
Page 52 STT20000A Product Manual
Figure 7-1a
Simplified block diagram of the STT20000N
DIGITAL
CONTROL
ASIC
256KB
EEPROM
5VOLT
188uP
20MHz
40MHz
CRYSTAL
READ
WRITE
TAPE
HEAD
CAPSTAN
MOTOR
STEPPER
MOTOR
MOTOR
CONTROLLER
512KB
DRAM
SCSI
INTERFACE
SENSORS
Figure 7-1b
Simplified Block Diagram of the STT20000N-C Drive
DIGITAL
CONTROL
ASIC
256KB
EEPROM
5VOLT
188uP
20MHz
40MHz
CRYSTAL
READ
WRITE
RWW
TAPE
HEAD
CAPSTAN
MOTOR
STEPPER
MOTOR
MOTOR
CONTROLLER
2MB
DRAM
SCSI
INTERFACE
SENSORS
ALDC-1 H/W
DATA
COMPRESSION