4-26
Registers
CRCOK
CRC Request OK
2
This bit indicates it is acceptable to force a CRC request.
This bit is set only if a CRC request has been sent and
no data has been transferred since the request. This bit
can be used to determine if it is necessary to send a
CRC request at the end of a data transfer, prior to
changing phases in target mode. This bit may be used to
prevent back-to-back CRC conditions. Back-to-back CRC
requests are illegal.
AAP
Assert SATN/ on Parity/CRC/AIP Error
1
When this bit is set, the LSI53C1000 automatically
asserts the SATN/ signal upon detection of a parity error
or CRC error. SATN/ is only asserted in the initiator
mode. The SATN/ signal is asserted before deasserting
SACK/ during the byte transfer with the parity error. Also
set the Enable Parity/CRC/AIP Checking bit for the
LSI53C1000 to assert SATN/ in this manner. A parity
error or CRC error is detected on data received from the
SCSI bus.
If the Assert SATN/ on Parity/CRC/AIP Error bit is cleared
or the Enable Parity/CRC/AIP Checking bit is cleared,
SATN/ is not automatically asserted on the SCSI bus
when a Parity/CRC/AIP error is received.
TRG
Target Mode
0
This bit determines the default operating mode of the
LSI53C1000. The user must manually set the target or
initiator mode. This is done using the SCRIPTS language
(
SET TARGET
or
CLEAR TARGET
). When this bit is set, the
chip is a target device. When this bit is cleared, the
LSI53C1000 is an initiator device.
Caution:
Writing this bit while not connected may cause the loss of
a selection or reselection due to the changing of target or
initiator modes.
Содержание LSI53C1000
Страница 6: ...vi Preface...
Страница 16: ...xvi Contents...
Страница 28: ...1 12 Introduction...
Страница 234: ...4 124 Registers...
Страница 314: ...6 40 Specifications This page intentionally left blank...
Страница 318: ...6 44 Specifications This page intentionally left blank...
Страница 344: ...6 70 Specifications This page intentionally left blank...
Страница 350: ...6 76 Specifications Figure 6 42 LSI53C1000 329 Ball Grid Array Bottom view...
Страница 352: ...6 78 Specifications...
Страница 360: ...A 8 Register Summary...
Страница 376: ...IX 12 Index...