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STATUS FOR TYPE II AND III COMMANDS
BIT NAME
S7 NOT READY
S6 WRITE PROTECT
S5 RECORD TYPE/
WRITE FAULT
S4 RECORD NOT
FOUND (RNF)
S3 CRC ERROR
S2 LOST DATA
SI DATA REQUEST
SO BUSY
MEAN1NG
This bit when set indicates the drive is not ready. When reset, it indicates that the drive
is ready. This bit is an inverted copy of the Ready input and 'ored' with MR. The Type II
and III Commands will not execute unless the drive is ready.
On Read Record: Not Used. On Read Track: Not Used. On any Write: It indicates a
Write Protect. This bit is reset when updated.
On Read Record: It indicates the record-type coda from data field address mark.
1 «= Deleted Data Mark. 0 = Data Mark. On any Write: It indicates a Write Fault. This bit
is reset when updated.
When set, it indicates that the desired Irack, sector, or side were not found. This bit is
reset when updated.
If S4 is set, an error is found in one or more ID lields; otherwise it indicates error in
data Meld. This bit is reset when updated.
When set, it indicates the Computer did not respond to DRQ in one byte time. This bit is
reset to zero when updated.
This'bit is a copy of the DRQ Output. When set, it indicates the DR is füll on a Read
Operation or the DR is empty on a Write Operation. This bit is reset to zero when up
dated.
When set, command is under execution. When reset, no command is under execution.
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings
Vdo wlth repeclto Vss (ground): +15to -0.3V
Vortage to any Input wlth respect to Vss = +15 to - 0.3V
Icc = 60 MA (35 MA nominal)
It» = 15 MA (10 MA nominal)
Cw & Cout = 15 pF max wlth all pins grounded except
one under test
Operatlng temperature = 0*Cto70*C
Storage temperature = -55'C to + 125'C
OPERATINQ CHARACTERISTICS (DQ
TA = 0*C to 70*C, Voo = + 12V ± .6V, Vss = 0V, Vcc = + 5V ± .25V
SYMBOL
Ib.
lo.
Vm
V».
Vom
Vol
Po
CHARACTERISTIC
Input Leakage
Output Leakage
Input High Voltage
Input Low Voltage
Output High Voltage
Output Low Voltage
Power Dlsslpation
MIN.
2.6
2JB
MAX
10
10
0.8
0.45
0.6
UNITS
,iA
mA
V
V
V
V
W
CONDITIONS
Vm = Vdo"
Vout = Vdo
lo = -100 i>A
los 1.6 mA*
• 1792 and 1794 k) = 1.0mA
"Leakage conditlons are for input pins withoul intemal pull-up resistors. Pins 22,23,33, 36, and 37 have pull-up resistors.
See Tech Memo #115 for testing procedures.
Seepage481 forordering Information.
Information lurnisned by Western Digital Corporalion is beüeved to be accurale and rehable. However. no responslbllily is assumed by Westem Digital
Corporation lor its uso; nor lor any inlrlngamants of Patents or other nghls of tnird partles whicti may rgsutl from its use. No llcense is granted by
imptication or otherwlse under ony paienl or patenl righls of Westein Digital Corporalion. Westein Digital Corporation reserves ine righl to change
specllicallons at anyllme wltrtout notlce.
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