Sun Microelectronics
129
7. UltraSPARC External Interfaces
Even though S_WBCAN and S_INAK have no data transfer, they must be sched-
uled as if they used SYSDATA; that is, they can be issued only when an S_WAB
or S_WAS would have been allowed. They do not add any SYSDATA use cycles,
however, for deciding when and which S_REPLYs can be issued after them.
7.15 Transaction Set Summary
Table 7-21 summarizes the requests and replies generated by UltraSPARC
Table 7-21 summarizes the requests and replies generated by the SC.
Table 7-21 Requests and Replies Generated by UltraSPARC
Requests Replies
P_RDS_REQ P_IDLE
P_RDSA_REQ P_RERR
P_RDO_REQ P_RAS
P_RDD_REQ P_SACK
P_WRB_REQ P_SACKD
P_WRI_REQ P_SNACK
P_NCRD_REQ P_IAK
P_NCWR_REQ P_FERR
P_NCBRD_REQ
P_NCBWR_REQ
P_INT_REQ
Table 7-22 Requests and Replies Generated by SC
Requests Replies
S_INV_REQ S_IDLE
S_CPB_REQ S_RTO
S_CPI_REQ S_ERR
S_CPD_REQ S_WAS
S_CPB_MSI_REQ S_WAB
P_NCRD_REQ S_OAK
P_NCBRD_REQ S_RBU
P_INT_REQ S_RBS
S_RAS
S_SRS
S_SRB
S_CRAB
S_SWIB
S_INAK
S_WBCAN
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
To Next Page
Loading...
Need help?
General