comtech
aha
corporation
PRODUCT BRIEF*
AHA3422 StarLite
16 MBYTES/SEC LOSSLESS
DECOMPRESSOR IC
AHA3422 is a high speed lossless
decompression coprocessor IC for the hardcopy
systems on many standard platforms, including the
PCI Bus. The device offers a low cost
decompression only solution for under 30 ppm
printers or 50 ppm copiers at 1200 dpi.
High speed decompression, flexible interfaces
and advanced banding support make this a unique
solution for Raster Image Processing (RIP)
controller designs. Advanced banding support
handles blank, uncompressed and compressed
bands. 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
NC
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:
• 16 MBytes/sec data rate
• 132 MBytes/sec burst data rate over a 32-bit
data bus
• 33 MBytes/sec burst rate, 16 MBytes/sec
sustained synchronous 8-bit video out port
• Average 15 to 1 compression ratio for 1200 dpi
bitmap image data
• Advanced banding support
FLEXIBILITY:
VDD
PA[5]
VSS
PA[4]
NC
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
VDD
*I
*I
*I
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
AHA3422A-033 PQC
YYWWD - COUNTRY OF ORIGIN
LLLLL
64
63
62
61
60
59
58
57
56
55
54
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 processors
• Pass-through mode passes raw data through the
decompression engine
SYSTEM INTERFACE:
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
• Single chip 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
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
*I
*I
*I
*I
*I
INTRN
VSS
VDD
DRIVEN
SD
DOACKN
VDD
DIACKN
VDD
VSS
VDD
DOREQN
NC
DIREQN
NC
NC
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
NOTES: NC = No Connect; *I = Connect to VDD or VSS
YYWWD = DATE CODE; LLLLL = LOT NUMBER
*Request the AHA3422 Product Specification for complete details.
comtech
aha
corporation
comtech
aha
corporation
Figure 1:
AHA3422 Block Diagram
DOREQN
DOACKN
DIREQN
DIACKN
DATA PORT CONTROL
32
D[31:0]
DRIVEN
DATA
PORT
32
SD
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]
5
AHA3422
StarLite
PA[5:0]
FUNCTIONAL DESCRIPTION
The coprocessor device has two external high
speed synchronous data ports each capable of
transferring once every 33 MHz clock. These are a
32-bit bidirectional data port and an 8-bit Video
Output Data (VOD) port. The data port is capable of
transferring up to 132 MBytes/sec. The VOD is
capable of up to 33 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 33 MHz clock
and is capable of processing an uncompressed byte
every other clock, i.e. 16 MBytes/sec.
The two FIFOs are organized as 16×32 each.
For data transfers through the two ports, the
“effective” FIFO widths differ according to their
data bus widths.
Data transfer is synchronous over the data ports
functioning as DMA masters. To initiate a transfer
into or out of the Video port, the device asserts
VOREQN, the external device responds with
VOACKN and begins to transfer data over the VOD
bus on each succeeding rising edge of the clock until
VOREQN is deasserted. The data port relies on the
FIFO Threshold settings to determine the transfer.
SYSTEM APPLICATION
The device is intended for memory intensive
applications requiring a hardware decompression
device, such as high resolution copiers or printers.
The part is typically used in systems where StarLite
compression is performed either in software or in
another StarLite compression device. It may also be
used in systems requiring multiple decompressors.
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
MP - Text and Simple Graphics
Output File Size = 783,848
Compression Ratio = 21.5
Output File Size = 86,525
Compression Ratio = 194.5
MATH - Simple Text and Lineart
BENCH2 - Text and Graphics with Pictorials
Output File Size = 424,995
Compression Ratio = 39.6
BALLS - Complex Graphics with Pictorials
Output File Size = 79,245
Compression Ratio = 212.4
Output File Size = 3,665,167
Compression Ratio = 4.6
comtech
aha
corporation
DECOMPRESSOR FOR MID-RANGE
MULTIFUNCTION COPIER/PRINTER
APPLICATIONS - AN EXAMPLE
FRAME BUFFER
MEMORY
DIACKN
32
bit
DIREQN
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.
CPU
INTERFACE
PA[4:0]
CSN
DIR
RDYN
INTRN
VOD PORT
DATA PORT
AHA3422
StarLite
ORDERING INFORMATION
PART NUMBER
DESCRIPTION
AHA3422A-033 PQC 16 MBytes/sec Lossless
Decompressor IC
8-bits
VOD PRINTER
PORT
VOEOTN
VOREQN
VOACKN
VOEORN
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
PB3422_0600
©
2005 Comtech AHA Corp.
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