tda5360uk NXP Semiconductors, tda5360uk Datasheet - Page 14

• Manufacturer Part Number: tda5360uk
• Description: Pre-amplifier For Hard Disk Drive With Mr-read / Inductive Write Heads
• Manufacturer: NXP Semiconductors

Philips Semiconductors
The following are valid READ fault conditions which set FLT=LOW
The following are valid WRITE fault conditions which set FLT=HIGH. An action can eventually be taken :
If the write current is disabled, the writer is powered down. The only way to restart a write sequence is to switch R/W
high and then to switch R/W low again.
Trying to go in Write mode from a sleep or standby mode condition will disable the write current.
If two fault conditions occurs nearly at the same time, the first to occur will be loaded in Reg. 07.
1998 July 30
Rext pin open or shorted to GND or Vcc
Thermal Asperity detected
Read Head open
Power supplies too low (VCC and/or VEE)
Write current present in read mode
Illegal head address ( i.e. head 12, 13, 14 or 15)
In this case, besides asserting the fault flag, the MR bias current is diverted to the dummy head.
No write current in write mode
Rext pin open or shorted to GND or Vcc
Pre-Amplifier for Hard Disk Drive with
MR-Read / Inductive Write Heads
Open write head or shorted to GND
Write data frequency too low
Power supplies too low
lllegal head address (i.e. HD 12, 13, 14, 15)
FAULT
Disable write current
Do not disable write current
Do not disable write current
Disable write current
Disable write current
Disable write current
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ACTION
Objective Specification, Revision 2.2
TDA5360