Intel 740 - Page 199

Revision 0.9
9
PC SGRAM Specification
L L H L L BA,A8 PRE/PALL
Ter m burst,
precharge
L H H L L X BST Term burst
L L L H L X CBR/SELF ILLEGAL 14
L L L L L Opcode MRS ILLEGAL 14
L L L L H Opcode SMRWR ILLEGAL 14
WRITE H x x x x X DSEL
Continue burst
to end ->Write
recovering
LHHHL X NOP
Continue burst
to end -> Write
recovering
LH L H L
BA,CA,A
8/A9
READ/
READAP
Ter m burst,
start read:
optional AP
8,9
LH L L L
BA,CA,A
8/A9
WRIT/
WRITEAP
Ter m burst,
new write:
optional AP
8
LHHLLX BST ILLEGAL
L H L L H BA,CA BLKWR ILLEGAL 8
L L H H L BA,RA ACT ILLEGAL 4
LL H L L
BA,
A8/A9
PRE/PALL
Ter m burst
precharging
10
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 with
auto
precharge
HXXXXX DSEL
Continue burst
to end ->
precharging
LHHHL X NOP
Continue burst
to end ->
precharging
LH L H L
BA,CA,
A8/A9
READ/
READAP
ILLEGAL 13
LH L L L
BA,CA,
A8/A9
WRIT/
WRITEAP
ILLEGAL 13
L H L L H BA,CA BLKWR ILLEGAL 13
L L H H L BA,RA ACT ILLEGAL 4,13
Current
state
CS# RAS# CAS# WE# DSF Address Command Action Notes
LHHLLX BST ILLEGAL
LL H L L
BA,
A8/A9
PRE/PALL ILLEGAL 4,13
L L L H L X CBR/SELF ILLEGAL 14
L L L L L Opcode MRS ILLEGAL 14
L L L L H Opcode SMRWR ILLEGAL 14
Write with
auto
precharge
HXXXXX DSEL
Continue burst
to end ->Write
recovering
with auto
precharge
Table 7. Operative Command Table
Current
state
CS# RAS# CAS# WE# DSF Address Command Action Notes