MU9C4480A Datasheet, PDF (1/32 Pages) MUSIC Semiconductors – LANCAM A/L series

Data Sheet
LANCAM A/L series (not recommended for new designs)
APPLICATION BENEFITS
The 256x64 to 4Kx64 LANCAM A/L series facilitate
numerous operations:
• Fast speed allows processing of both DA and SA
within 450 ns, equivalent to 138 ports of 10 Base-T or
13 ports of 100 Base-T Ethernet (50 ns device)
• Full CAM features allow all operations to be masked
on a bit-by-bit basis
• Powerful instruction set for any list processing need
• Shiftable Comparand and Mask registers assist in
proximate matching algorithms
• Cascadable to any practical length with no
performance penalties
• Industrial temperature grades for harsh environments
• Available in 3.3 Volt for lower power systems
(Use functional compatible LANCAM B family for new designs)
DISTINCTIVE CHARACTERISTICS
• High density CMOS Content Addressable Memory
(CAM)
• Available in the following depths: 256 (3480), 512
(5480), 1K (1480), 2K (2480) and 4K (4480) words.
• 64-bit per word memory organization
• 16-bit I/O
• Fast 50 ns compare speed (1480A and 2480A)
• Dual configuration register set for rapid context
switching
• 16-bit CAM/RAM segments with MUSIC’s patented
partitioning
• /MA and /MM output flags to enable faster system
performance
• Readable Device ID
• Selectable faster operating mode with no wait states
after a no-match
• Validity bit setting accessible from the Status register
• Single cycle reset for Segment Control register
• 5 Volt (A series) or 3.3 Volt (L series) operation
• 44-pin PLCC package
(also available in Lead-Free package upon request)
DQ (15—0)
(16)
DATA (16)
MUX
DATA (64)
DATA (16)
TRANSLATE
802.3 / 802.5
DATA (16)
DEMUX _{DATA (64)}
VCC
GND
/E
/W
/CM
/RESET
/EC
COMMANDS &
STATUS (16)
SOURCE AND
DESTINATION
SEGMENT
COUNTERS
CONTROL
16
INSTRUCTION (W/O)
ADDRESS
NEXT FREE ADDRESS (R/O)
CONTROL
SEGMENT CONTROL
PAGE ADDRESS (LOCAL)
DEVICE SELECT (GLOBAL)
STATUS (15-0) (R/O)
STATUS (31-16) (R/O)
REGISTER SET
N
MATCH ADDR &
/MA FLAG
/MM, /FL
N+1
2
COMPARAND
MASK 1
MASK 2
CAM ARRAY
2^N WORDS
X 64 BITS
Figure 1: LANCAM B Family Block Diagram
MUSIC Semiconductors, the MUSIC logo, and the phrase "MUSIC Semiconductors" are
Registered trademarks of MUSIC Semiconductors. MUSIC is a trademark of
MUSIC Semiconductors.
/MA
/MM
2
/FF
MATCH
AND
/FI
FLAG
LOGIC
/MF
/MI
April 18, 2005 Rev. 1