Product Manual
Page 5
... the alert signals and their meanings: This indicates a hazarous situation likely to show where the alert message begins and ends. The disk drive is an abbreviation of address decoder, driver, and receiver. The alert signal consists of an alert signal and alert statements. Conventions for Alert Messages This manual uses the following...
... the alert signals and their meanings: This indicates a hazarous situation likely to show where the alert message begins and ends. The disk drive is an abbreviation of address decoder, driver, and receiver. The alert signal consists of an alert signal and alert statements. Conventions for Alert Messages This manual uses the following...
Product Manual
Page 29
... mode 3, mode 4, DMA mode 2 or ultra DMA mode 4), occurrence of ringing or crosstalk of the signal lines (AT bus) between the HA and the disk drive should be a great cause of the obstruction of the signal lines including the HA and cable does not exceed the ATA-3 and ATA-4 standard, and... the cable length between the HA and the disk drive may be as short as possible. 2 - 4 C141-E069-02EN Thus, it is necessary that the capacitance of system reliability. IMPORTANT HA (host adapter) consists of...
... mode 3, mode 4, DMA mode 2 or ultra DMA mode 4), occurrence of ringing or crosstalk of the signal lines (AT bus) between the HA and the disk drive should be a great cause of the obstruction of the signal lines including the HA and cable does not exceed the ATA-3 and ATA-4 standard, and... the cable length between the HA and the disk drive may be as short as possible. 2 - 4 C141-E069-02EN Thus, it is necessary that the capacitance of system reliability. IMPORTANT HA (host adapter) consists of...
Product Manual
Page 38
... to the cable (contact 28 may be wired to ground and shall not be used for each cable. C141-E069-02EN 3 - 9 They shall provide separate drivers and separate receivers for systems operating at Ultra DMA modes greater than mode 2 shall not share I/O ports. The 80-coductor cable assemblies may be removed...
... to the cable (contact 28 may be wired to ground and shall not be used for each cable. C141-E069-02EN 3 - 9 They shall provide separate drivers and separate receivers for systems operating at Ultra DMA modes greater than mode 2 shall not share I/O ports. The 80-coductor cable assemblies may be removed...
Product Manual
Page 50
... analog signal converted to digital for control of the voice coil motor. (3) Spindle motor driver circuit The circuit measures the interval of a motor, or servo mark at the MPU... filter, times base generator, and data separator circuits. 4.3 Circuit Configuration Figure 4.2 shows the disk drive circuit configuration. (1) Read/write circuit The read/write circuit consists of the write current switch circuit,..., that amplitudes the read output from the head. The RDC also contains the 16/17 group coded recording (GCR) encoder and decoder and servo demodulation circuit. (2) Servo circuit...
... analog signal converted to digital for control of the voice coil motor. (3) Spindle motor driver circuit The circuit measures the interval of a motor, or servo mark at the MPU... filter, times base generator, and data separator circuits. 4.3 Circuit Configuration Figure 4.2 shows the disk drive circuit configuration. (1) Read/write circuit The read/write circuit consists of the write current switch circuit,..., that amplitudes the read output from the head. The RDC also contains the 16/17 group coded recording (GCR) encoder and decoder and servo demodulation circuit. (2) Servo circuit...
Product Manual
Page 60
...speed when power is the block diagram of the MPU. The major internal operations are listed below. Move head to reference cylinder Drives the VCM to the internal operations of the servo control circuit. The logical initial cylinder is at the any cylinder in the... data area. b. VCM current CSR VCM CSR: Current Sense Resistor VCM: Voice Coil Motor (6) Spindle motor control (7) Driver Spindle motor Figure 4.5 Block diagram of the blocks: Head (2) Servo burst capture (3) ADC (1) MPU DSP unit Position Sense SVC (4) (5) DAC P. a. ...
...speed when power is the block diagram of the MPU. The major internal operations are listed below. Move head to reference cylinder Drives the VCM to the internal operations of the servo control circuit. The logical initial cylinder is at the any cylinder in the... data area. b. VCM current CSR VCM CSR: Current Sense Resistor VCM: Voice Coil Motor (6) Spindle motor control (7) Driver Spindle motor Figure 4.5 Block diagram of the blocks: Head (2) Servo burst capture (3) ADC (1) MPU DSP unit Position Sense SVC (4) (5) DAC P. a. ...
Product Manual
Page 62
...the target revolution speed, then flows the current into the motor coil according to the differentiation (aberration). (7) Driver circuit The driver circuit is a power amplitude circuit that receives signals from the spindle motor control circuit and feeds currents to ... transfers the digital signal to the DSP unit. (4) D/A converter (DAC) The D/A converter (DAC) converts the VCM drive current value (digital value) calculated by converting the VCM current into analog values and transfers them to the power amplifier. ... by the DSP unit into voltage and feeding back. C141-E069-02EN 4 - 17
...the target revolution speed, then flows the current into the motor coil according to the differentiation (aberration). (7) Driver circuit The driver circuit is a power amplitude circuit that receives signals from the spindle motor control circuit and feeds currents to ... transfers the digital signal to the DSP unit. (4) D/A converter (DAC) The D/A converter (DAC) converts the VCM drive current value (digital value) calculated by converting the VCM current into analog values and transfers them to the power amplifier. ... by the DSP unit into voltage and feeding back. C141-E069-02EN 4 - 17
Product Manual
Page 66
...speed, the MPU does track following sequence: a) After the power is used as the spindle motor driver (called SVC hereafter). These are three modes for each sampling time, the VCM drive current is digitally executed by setting the calculated result into the spindle motor. Then, a current (approx...C141-E069-02EN 4 - 21 The MPU then feeds the VCM drive current by the firmware. c) The SVC generates a phase switching signal by itself, and changes the phase of a track, the DSP drives the VCM by Fujitsu. There are digitally controlled by the firmware. 4.7.5 Spindle motor control...
...speed, the MPU does track following sequence: a) After the power is used as the spindle motor driver (called SVC hereafter). These are three modes for each sampling time, the VCM drive current is digitally executed by setting the calculated result into the spindle motor. Then, a current (approx...C141-E069-02EN 4 - 21 The MPU then feeds the VCM drive current by the firmware. c) The SVC generates a phase switching signal by itself, and changes the phase of a track, the DSP drives the VCM by Fujitsu. There are digitally controlled by the firmware. 4.7.5 Spindle motor control...
Product Manual
Page 155
...6 Data valid hold time at sender (from STROBE edge until data may become invalid) (see Note 3) 10 Maximum time allowed for output drivers to release (from asserted or negated) 20 Minimum delay time required for device to first negate DSTROBE from DMACK- during data in burst initiation... (see Note 3) 20 Interlock time with minimum (see Note 3) 0 Unlimited interlock time (see Note 5) 0 120 First STROBE time (for output 0 Drivers to assert or negate (from released) 20 55 Envelope time (from STOP during data out burst initiation) NA STROBE-to-DMARDY-time (if DMARDY- to...
...6 Data valid hold time at sender (from STROBE edge until data may become invalid) (see Note 3) 10 Maximum time allowed for output drivers to release (from asserted or negated) 20 Minimum delay time required for device to first negate DSTROBE from DMACK- during data in burst initiation... (see Note 3) 20 Interlock time with minimum (see Note 3) 0 Unlimited interlock time (see Note 5) 0 120 First STROBE time (for output 0 Drivers to assert or negate (from released) 20 55 Envelope time (from STOP during data out burst initiation) NA STROBE-to-DMARDY-time (if DMARDY- to...