cxa1829n Sony Electronics, cxa1829n Datasheet - Page 11

• Manufacturer Part Number: cxa1829n
• Description: 8ch. Read/write Amplifier For Thin Film Heads Of Hard Disk Drive
• Manufacturer: Sony Electronics

Write-unsafe detection circuit (refer to the “Notes on Operation.”)
This circuit detects write errors.
In normal Write mode, the WUS output is low; in the conditions listed below, it is high.
• Head input is open.
• Head input is shorted to GND or V
• Write data frequency is abnormally low.
• There is no Write current.
• In Read mode
• In Power save mode
• Supply voltage is abnormal (refer to the “Power supply ON/OFF detection.”)
Power supply ON/OFF detection
This circuit monitors V
The error status is established when V
detector, in which case the recording and playback functions are prohibited.
When V
Application Circuit
Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for
any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same.
CC
rises above VTH, the prohibition of these functions is released.
30
1
CC
to detect erroneous Writes.
29
2
28
3
R
W
CC
27
4
10k
.
PULSE
DETECTOR
CC
26
5
falls below the threshold voltage (V
25
6
24
7
—11—
Fig. 5
23
8
22
9
+5V
21
10
20
11
19
12
1µ
3.9k
TH
18
13
) of the power supply ON/OFF
17
14
16
15
CXA1829N