Vendor ID Register .............................................................................................................. 3-4
Device ID ............................................................................................................................ 3-4
Command Register ............................................................................................................... 3-4.
Revision ID Register ............................................................................................................. 3-6
Status Register ..................................................................................................................... 3-6
I..atency TiIner Register ............................................ ~........................................................... 3-7
Chapter Four
Signal Descriptions
Power and Ground Pins ............................................................................................................. 4-2
System Pins ............................................................................................................................... 4-3
Address and Data ...................................................................................................................... 4-3
Interface Control ....................................................................................................................... 4-4
Arbitration ................................................................................................................................. 4-5
Error Reporting ......................................................................................................................... 4-5
SCSI Signals .............................................................................................................................. 4-6
Additional Interface ....................................................................................................................4-7
Chapter Five
Operating Registers
Operating Register Addresse~ and Descriptions ..................................................................... 5-1
Register Address Map ....................:...................................................................................... 5-3
Chapter Six
Instruction Set of the I/O Processor
. Chapter Seven
Electrical Characteristics.
DC Electrical Characteristics ............ ~......................................................................................... 6-1
NCR TolerANT Active Negation Technology Electrical Characteristics ...................................... 6-5
AC Electrical Characteristics ...................................................................................................... 6-8
53 C81 0 TiInings .....................................~ ................................................................................ 6-19
Appendix A
Register Summary
Appendix B
~echarricaIDra~g
iv
NCR 53C81 0 Data Manual