Control State Descriptions
MU9C4320L ATMCAM
Control State:
Mnemonic:
Move Data from Comparand
Register to Next Free Address
MOV [NFA],CR{MRnnn}
Comparison
Control State:
Compare Comparand Register
with Memory Array
CMP CR,{MRnnn}
Binary Op Code: XXX nnn 001 101
Mnemonic:
/W: LOW /AV: HIGH PA:AA: NFA Scope: NFD
Description: Moves data from the Comparand Register to
the Next Free address. In a vertically cascaded system, the
write will take place in the device whose /FI=LOW and
/FF=HIGH, and at the highest-priority location whose
Validity bit is set HIGH. The validity of the location is set
by the state of the /VB input, /VB = LOW: Valid, /VB =
HIGH: Empty. The move is masked by the contents of
Mask Register nnn. When nnn=000 no mask is used; when
masking is selected, only bits in the addressed location
that correspond to LOW values in the selected mask
register are updated.
Binary Op Code: XXX nnn 011 000
/W: LOW /AV: HIGH PA:AA: HPMA Scope: AS
Description: The Comparand register is compared with
all locations in the Memory array that have their Validity
bits set LOW. The comparison is masked by the contents
of Mask Register nnn. When nnn=000 no mask is used;
when masking is selected, only bits that correspond to
LOW values in the selected mask register are compared.
Control State:
Compare Data Bus with
Memory Array
Mnemonic:
CMP DQ,{MRnnn}
Binary Op Code: XXX nnn 011 001
Control State:
Move Data from Comparand
Register to Highest-Priority
Matching Location
/W: LOW /AV: HIGH PA:AA: HPMA Scope: AS
Description: The data from the DQ bus is compared with
all locations in the Memory array that have their Validity
bits set LOW. The comparison is masked by the contents
of Mask Register nnn. When nnn=000 no mask is used;
when masking is selected, only bits that correspond to
LOW values in the selected mask register are compared.
Mnemonic:
MOV [HPM],CR{MRnnn}
Binary Op Code: XXX nnn 001 110
/W: LOW /AV: HIGH PA:AA: HPMA Scope: HPD
Description: Moves data from the Comparand register to
the Highest-Priority Matching address from the previous
Comparison cycle. The validity of the location is set by the
state of the /VB input, /VB = LOW: Valid, /VB = HIGH:
Empty. The move is masked by the contents of Mask
Register nnn. When nnn=000 no mask is used; when
masking is selected, only bits in the addressed location
that correspond to LOW values in the selected mask
register are updated.
Control State:
Compare Data Bus with Memory
Array; Write Data Bus to
Comparand Register
Mnemonic:
CMPW DQ,{MRnnn}
Binary Op Code: XXX nnn 011 010
/W: LOW /AV: HIGH PA:AA: HPMA Scope: AS
Description: The data from the DQ bus is compared with
all locations in the Memory array that have their Validity
bits set LOW. The data from the DQ31–0 bus is written to
the Comparand register. The comparison is masked by the
contents of Mask Register nnn. When nnn=000 no mask is
used; when masking is selected, only bits that correspond
to LOW values in the selected mask register are compared.
Note that the selected mask register masks the comparison
and not the write to Comparand register.
Control State:
Move Data from Highest-Priority
Matching Location to
Comparand Register
Mnemonic:
MOV CR,[HPM]{MRnnn}
Binary Op Code: XXX nnn 001 110
/W: HIGH /AV: HIGH PA:AA: HPMA Scope: HPD
Description: Moves data from the Highest-Priority Match
address from the previous Comparison cycle to the
Comparand register. The move is masked by the contents
of Mask Register nnn. When nnn=000 no mask is used;
when masking is selected, only bits in the addressed
location that correspond to LOW values in the selected
mask register are updated. Note that the /VB line is not
driven during this operation.
Control State:
Mnemonic:
Advance to Next Matching Location
INC MA
Binary Op Code: XXX nnn 011 011
/W: LOW /AV: HIGH PA:AA: HPMA Scope: HPD
Description: Advances the Match address to the next
matching location when the previous Comparison cycle
resulted in a multiple match. The /MF flag will go HIGH
when all matches have been exhausted, therefore the
scheme operates in vertically cascaded systems through
the priority daisy chain.
Rev. 3
23
MUSIC [ MUSIC SEMICONDUCTORS ]
