cxa3090n Sony Electronics, cxa3090n Datasheet - Page 12

• Manufacturer Part Number: cxa3090n
• Description: 6ch. Read/write Amplifier For Thin Film Head Of Hard Disk Drive
• Manufacturer: Sony Electronics

Write unsafe detection circuit
This circuit detects write errors.
In normal Write mode, the WUS output is low; in the conditions listed below, it is high.
Power supply ON/OFF detection
This circuit monitors V
threshold voltage (Vth) of the power supply ON/OFF detector, in which case the recording and playback
functions are prohibited. When V
• Head inputs is open (under the condition which. RH= and Write data frequency is
• Head input is shorted to GND or VCC.
• Write data frequency is abnormally low.
• No write current.
• In read mode.
• Supply voltage is abnormal (see power supply ON/OFF detection).
CC
to detect erroneous Writes. The error status is established when V
Table 3. Head selection in Servo Write mode
CC
HS0
H
H
L
L
rises above, VTH, the prohibition of these functions is released.
—12—
HS1
H
H
L
L
0, 1, 2, 3, 4, 5
0, 1, 2, 3, 4, 5
0, 1, 2
3, 4, 5
Head
10 MHz)
CC
falls below the
CXA3090N