Intel 740 - 5 Operative Command Table

PC SGRAM Specification
8
Revision 0.9
5.0 Operative Command Table
Table 7. Operative Command Table
Current
state
CS# RAS# CAS# WE# DSF Address Command Action Notes
Idle H X X X L X DSEL
Nop or Power
Down
3
LHHHL X NOP
Nop or Power
Down
3
LH L H L
BA,CA,
A8/A9
READ/
READAP
ILLEGAL 4
LH L L L
BA,CA,
A8/A9
WRITE/
WRITEAP
ILLEGAL 4
L H L L H BA,CA BLKWR ILLEGAL 4
L L H H L BA,RA ACT Row Active
LL H L L
BA,
A8/A9
PRE/PALL NOP
L L L H L X CBR/SELF
Refresh or Self
refresh
5
L L L L L Op-code MRS
Mode Register
access
L L L L H Op-code SMRWR
Special Mode
Register Write
Row active H X X X X X DSEL NOP
LHHHL X NOP NOP
LH L H L
BA,CA,
A8/A9
READ/
READAP
Begin read:
Optional AP
6
LH L L L
BA,CA,
A8/A9
WRITE/
WRITEAP
Begin write:
Optional AP
6
L H L L H BA,CA BLKWR
Begin Block
write:
6
L L H H L BA,RA ACT ILLEGAL 4
LL H L L
BA,
A8/A9
PRE/PALL Precharge 7
L L L H L X CBR/SELF ILLEGAL 14
L L L L L OP-code MRS ILLEGAL 14
L L L L H OP-code SMRWR ILLEGAL 14
READ HXXXXX DSEL
Continue burst
to end -> Row
active
LHHHL X NOP
Continue burst
to end -> Row
active
LH L H L
BA,CA,
A8/A9
READ/
READAP
Term burst,
new read:
Optional AP
8
LH L L L
BA,CA,
A8/A9
WRITE/
WRITEAP
Term burst,
new wrtie:
Optional AP
8,9
L H L L H BA,CA BLKWR ILLEGAL 8,9
L L H H L BA,RA ACT ILLEGAL 4