Power-On Sequence; Mpf3Xxxat Block Diagram - Fujitsu MPF3XXXAT Product Manual

Switch
Flash ROM
64K 16 bits
ATA
Series Termination
I/F
– PIO Mode-4
– Multiword DMA Mode-2
– Ultra DMA Mode-4
4.4

Power-on Sequence

Figure 4.3 describes the operation sequence of the disk drive at power-on. The outline is
described below.
a) After the power is turned on, the disk drive executes the MPU bus test, internal register
read/write test, and work RAM read/write test.
successfully, the disk drive starts the spindle motor.
b) The disk drive executes self-diagnosis (data buffer read/write test) after enabling response
to the ATA bus.
c) After confirming that the spindle motor has reached rated speed, the disk drive releases the
heads from the actuator magnet lock mechanism by applying current to the VCM. This
unlocks the heads which are parked at the inner circumference of the disks.
d) The disk drive positions the heads onto the SA area and reads out the system information.
e) The disk drive executes self-seek-calibration. This collects data for VCM torque and
mechanical external forces applied to the actuator, and updates the calibrating value.
f) The drive becomes ready. The host can issue commands.
Himalaya 1.5
CL-SH8669
MCU
ARM7TDMI
RDC
CL-SH3512
HDC
SH7660
PB-15
21.5 to 37.8 MB/s
Buffer Bandwidth = 110.0 MB/s
Data Buffer
256K 16 bits
Option
(1024K 16 bits)
Figure 4.2

MPF3xxxAT Block diagram

C141-E099-01EN
Console I/F (RS232C)
40.0 MHz
Head IC SVC
TLS26B454 HA13626
R/W
SPM/VCM
When the self-diagnosis terminates
control
4 - 5