AGL400V5-FGG484 Actel, AGL400V5-FGG484 Datasheet - Page 97
![FPGA - Field Programmable Gate Array 400K System Gates](/photos/16/15/161507/fgba-484_sml.jpg)
AGL400V5-FGG484
Manufacturer Part Number
AGL400V5-FGG484
Description
FPGA - Field Programmable Gate Array 400K System Gates
Manufacturer
Actel
Datasheet
1.AGL030V2-CSG81.pdf
(236 pages)
Specifications of AGL400V5-FGG484
Processor Series
AGL400
Core
IP Core
Number Of Logic Blocks
12
Maximum Operating Frequency
250 MHz
Number Of Programmable I/os
194
Data Ram Size
54 Kbit
Supply Voltage (max)
1.5 V
Supply Current
27 uA
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Development Tools By Supplier
AGL-Icicle-Kit, AGL-Dev-Kit-SCS, Silicon-Explorer II, Silicon-Sculptor 3, SI-EX-TCA, FlashPro 4, FlashPro 3, FlashPro Lite
Mounting Style
SMD/SMT
Supply Voltage (min)
1.425 V
Number Of Gates
400 K
Package / Case
FPBGA-484
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Figure 2-14 • B-LVDS/M-LVDS Multipoint Application Using LVDS I/O Buffers
Figure 2-15 • LVPECL Circuit Diagram and Board-Level Implementation
OUTBUF_LVPECL
R
T
Z
Z
Z
stub
0
0
Receiver
+
R
R
S
B-LVDS/M-LVDS
Bus LVDS (B-LVDS) and Multipoint LVDS (M-LVDS) specifications extend the existing LVDS standard to
high-performance multipoint bus applications. Multidrop and multipoint bus configurations may contain
any combination of drivers, receivers, and transceivers. Actel LVDS drivers provide the higher drive
current required by B-LVDS and M-LVDS to accommodate the loading. The drivers require series
terminations for better signal quality and to control voltage swing. Termination is also required at both
ends of the bus since the driver can be located anywhere on the bus. These configurations can be
implemented using the TRIBUF_LVDS and BIBUF_LVDS macros along with appropriate terminations.
Multipoint designs using Actel LVDS macros can achieve up to 200 MHz with a maximum of 20 loads. A
sample application is given in
section in
Example: For a bus consisting of 20 equidistant loads, the following terminations provide the required
differential voltage, in worst-case Industrial operating conditions, at the farthest receiver: R
R
LVPECL
Low-Voltage Positive Emitter-Coupled Logic (LVPECL) is another differential I/O standard. It requires
that one data bit be carried through two signal lines. Like LVDS, two pins are needed. It also requires
external resistor termination.
The full implementation of the LVDS transmitter and receiver is shown in an example in
building blocks of the LVPECL transmitter-receiver are one transmitter macro, one receiver macro, three
board resistors at the transmitter end, and one resistor at the receiver end. The values for the three driver
resistors are different from those used in the LVDS implementation because the output standard
specifications are different.
-
T
EN
R
Z
= 70 Ω, given Z
S
stub
FPGA
Z
Z
Table 2-148 on page 2-82
Z
0
0
stub
Transceiver
+
R
T
S
0
-
= 50 Ω (2") and Z
N
EN
P
R
Z
stub
S
Bourns Part Number: CAT16-PC4F12
100 Ω
100 Ω
Z
Z
Z
0
0
Figure
stub
Driver
+
R
D
and
S
2-14. The input and output buffer delays are available in the LVDS
stub
-
EN
R
Z
Table 2-149 on page
S
stub
187 W
= 50 Ω (~1.5").
R ev i si o n 1 8
Z
Z
Z
Z
Z
0
0
0
0
stub
= 50 Ω
= 50 Ω
Receiver
+
R
R
S
-
EN
100 Ω
R
Z
S
stub
2-82.
...
N
P
Z
Z
0
0
IGLOO Low Power Flash FPGAs
FPGA
Transceiver
+
–
+
R
T
S
-
EN
INBUF_LVPECL
R
S
Figure
S
BIBUF_LVDS
= 60 Ω and
Z
Z
2-15. The
0
0
2- 83
R
T
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