comtech
aha
corporation
PRODUCT BRIEF*
AHA3431 StarLite
SIMULTANEOUS
COMPRESSOR/DECOMPRESSOR IC, 3.3V
AHA3431 is a high speed lossless compression
coprocessor IC for the hardcopy systems on many
standard platforms. The AHA3431 is functionally
backward compatible to the AHA3411.
Simultaneous compression and decompression,
flexible interfaces and advanced banding support
make this a unique solution for high performance
Raster Image Processing (RIP) controller designs.
Advanced banding support handles blank,
uncompressed and compressed bands during
decompression mode. Scan line and record length
counters accommodate various print resolutions
and band buffer sizes.
Software simulation and an analysis of the
algorithm for printer and copier images of various
complexity are available for evaluation.
PA[3]
PA[2]
PA[1]
PA[0]
TEST0
VOACKN
VSS
VDD
COEORN
VOD[7]
VOD[6]
VOD[5]
VOD[4]
VOD[3]
VSS
VDD
VOD[2]
VOD[1]
VOD[0]
VOEORN
VOREQN
D[31]
VSS
VSS
VDD
VDD
D[30]
D[29]
D[28]
D[27]
D[26]
D[25]
FEATURES
PERFORMANCE:
• 66 MBytes/sec compression/decompression rates
• 264 MBytes/sec burst data rate over a 32-bit
data bus
• 66 MBytes/sec synchronous optional 8-bit video
in and video out ports
• Simultaneous compression and decompression at
full bandwidth
• Average 15 to 1 compression ratio for 1200 dpi
bitmap image data
• Advanced banding support
FLEXIBILITY:
VDD
PA[5]
VSS
PA[4]
COEOTN
VOEOTN
PROCMODE[1]
PROCMODE[0]
CSN
VDD
VSS
DIR
RSTN
PD[7]
PD[6]
PD[5]
VDD
VSS
PD[4]
PD[3]
PD[2]
PD[1]
PD[0]
VDD
VSS
RDYN
VIACKN
VID[7]
VID[6]
VID[5]
VDD
VSS
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
AHA3431A-066 PQC
YYWW - COUNTRY OF ORIGIN
LLLLL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
64
63
62
61
60
59
58
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53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
VDD
VSS
D[24]
D[23]
D[22]
D[21]
D[20]
D[19]
D[18]
D[17]
D[16]
D[15]
VDD
VSS
VDD
VDD
VSS
CLOCK
VDD
VSS
VSS
TEST1
D[14]
D[13]
D[12]
VDD
VSS
D[11]
D[10]
D[9]
D[8]
D[7]
• Big Endian or Little Endian; 32 or 16-bit bus
width and data bit/byte reordering for duplex
printing support
• Programmable Record Length, Record Count and
Scan Length Registers may be prearmed
• Scan line length up to 2K bytes
• Interfaces directly with various Motorola 68xxx
and Cold FIRE and Intel i960 embedded processors
• Pass-through mode passes raw data through
compression and decompression engines
SYSTEM INTERFACE:
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76
75
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68
67
66
65
• Single chip compression/decompression
solution–no external SRAM required
• Four internal 16 × 32-bit FIFOs
• Maskable interrupts
• Tristatable outputs to facilitate board level testing
OTHERS:
•
•
•
•
•
•
Low power modes
Optional counter checks errors in decompression
Software emulation program available
128 pin quad flat package
3.3V operation
RoHS compliant
NOTE: YYWW = DATE CODE, LLLLL = LOT NUMBER
VID[4]
VID[3]
VID[2]
VID[1]
VID[0]
INTRN
VSS
VDD
DRIVEN
SD
DOACKN
COACKN
DIACKN
CIACKN
VSS
VDD
DOREQN
COREQN
DIREQN
CIREQN
VIREQN
D[0]
VSS
VSS
VDD
VDD
D[1]
D[2]
D[3]
D[4]
D[5]
D[6]
APPLICATIONS
• Digital copiers
• Printer controllers
• Multifunction printers and copiers
comtech
aha
corporation
*Request the AHA3431 Product Specification (PS3431) for complete details.
comtech
aha
corporation
Figure 1:
AHA3431 Block Diagram
COREQN
DOREQN
COACKN
DOACKN
CIREQN
DIREQN
CIACKN
DIACKN
SD
(From Scanner)
VIREQN
VID[7:0]
VIACKN
32
D[31:0]
DRIVEN
DATA PORT CONTROL
VID
PORT
8
COEORN
COEOTN
CI
FIFO
16x32
8
COMPRESSOR
8
CO
FIFO
16x32
DATA
PORT
32
32
(To Printer)
VOEOTN
VOEORN
VOREQN
VOD[7:0]
VOACKN
DI
FIFO
16x32
8
DECOMPRESSOR
8
DO
FIFO
16x32
8
VOD
PORT
CLOCK
PROCMODE[1:0]
MICROPROCESSOR INTERFACE
8
PD[7:0]
6
AHA3431
StarLite
PA[5:0]
FUNCTIONAL DESCRIPTION
The coprocessor device has three external high
speed synchronous data ports each capable of
transferring once every clock. These are a 32-bit
bidirectional data port, an 8-bit Video Input Data
(VID) port and a Video Output Data (VOD) port.
The data port is capable of transferring up to 32 bits
per clock. The VID and VOD are also capable of
one transfer per clock.
The device accepts uncompressed data through
the data port or optionally through the 8-bit VID
port into its Compression In FIFO (CI FIFO).
Compressed data is available through the data port
via the Compressed Output FIFO (CO FIFO). The
sustained data rate through the compression engine
is 66 MBytes/sec.
Decompression data is accepted through the data
port, buffered in the Decompression Input FIFO (DI
FIFO), and decompressed. The output data is made
available on the data port via the Decompression
Output FIFO (DO FIFO) or optionally on the 8-bit
Video Output port. The decompression engine runs
on the 66 MHz clock and is capable of processing an
uncompressed byte every clock.
The four FIFOs are organized as 16×32 each.
For data transfers through the three ports, the
“effective” FIFO widths differ according to their
data bus widths.
Data transfer for compression or decompression
is synchronous over the three data ports functioning
as DMA masters. To initiate a transfer into or out of
the Video ports, the device asserts VxREQN, the
external device responds with VxACKN and begins
to transfer data over the VID or VOD busses on each
succeeding rising edge of the clock until VxREQN
is deasserted. The data port relies on the FIFO
Threshold settings to determine the transfer.
Note:x is referred to I or O.
SYSTEM APPLICATION
The device is intended for memory intensive
applications, such as digital copiers or printers.
These applications require the simultaneous
compression and decompression capability of the
device. Copiers use this feature to feed the
compressed bit maps through the decompressor to
the printer engine while another process uses the
compressor to input and compress scanned images.
Movement for both processes is typically controlled
by a DMA controller that is programmed by the local
microprocessor.
INTRN
RDYN
RSTN
TEST
CSN
CLK
DIR
comtech
aha
corporation
StarLite IMAGE COMPRESSION RESULTS - 1200 x 1200 DPI
Uncompressed file size = 16 MBytes; Image dimensions = 10200 × 13200 pels
FONTS - Simple Text
Output File Size = 86,525
Compression Ratio = 194.5
BENCH2 - Text and Graphics with Pictorials
Output File Size = 783,848
Compression Ratio = 21.5
Output File Size = 424,995
Compression Ratio = 39.6
MATH - Simple Text and Lineart
BALLS - Complex Graphics with Pictorials
Output File Size = 3,665,167
Compression Ratio = 4.6
Output File Size = 79,245
Compression Ratio = 212.4
MP - Text and Simple Graphics
comtech
aha
corporation
COMPRESSOR/DECOMPRESSOR FOR MID-
RANGE MULTIFUNCTION COPIER/PRINTER
APPLICATIONS - AN EXAMPLE
ABOUT AHA
Comtech AHA Corporation (AHA) develops
and markets superior integrated circuits, boards,
and intellectual property core technology for
communications systems architects worldwide.
AHA has been setting the standard in Forward Error
Correction and Lossless Data Compression
technology for many years and provides flexible,
cost-effective solutions for today’s growing
bandwidth and reliability challenges. Comtech
AHA Corporation is a wholly owned subsidiary of
Comtech Telecommuncations Corp. (NASDAQ:
CMTL). For more information, visit www.aha.com.
FRAME BUFFER
MEMORY
COACKN
DIACKN
32
bit
COREQN
DIREQN
2
CPU
INTERFACE
PA[4:0]
CSN
DIR
RDYN
INTRN
2
DATA PORT
AHA3431
StarLite
VID PORT
VOD PORT
ORDERING INFORMATION
PART NUMBER
VOD PRINTER
PORT
(66 MBytes/sec)
VOEOTN
VOREQN
VOACKN
VOEORN
DESCRIPTION
VID SCANNER
PORT
(66 MBytes/sec) 8-bits
VIACKN
VIREQN
8-bits
AHA3431A-050 PQC 50 MBytes/sec Simultaneous
Compressor/Decompressor IC
66 MBytes/sec Simultaneous
AHA3431A-066 PQC Compressor/Decompressor IC
comtech
aha
corporation
A subsidiary of Comtech Telecommunications Corporation
1126 Alturas Drive
Moscow ID 83843-8331
tel: 208.892.5600
fax: 208.892.5601
e-mail: sales@aha.com
www.aha.com
PB3431_1205
©
2005 Comtech AHA Corp.
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