GAL20V8.PDF
(
561 KB
)
Pobierz
Specifications
GAL20V8
GAL20V8
High Performance E
2
CMOS PLD
Generic Array Logic™
FEATURES
FUNCTIONAL BLOCK DIAGRAM
• HIGH PERFORMANCE E
2
CMOS
®
TECHNOLOGY
— 5 ns Maximum Propagation Delay
— Fmax = 166 MHz
— 4 ns Maximum from Clock Input to Data Output
— UltraMOS
®
Advanced CMOS Technology
• 50% to 75% REDUCTION IN POWER FROM BIPOLAR
— 75mA Typ Icc on Low Power Device
— 45mA Typ Icc on Quarter Power Device
• ACTIVE PULL-UPS ON ALL PINS
•E
2
CELL TECHNOLOGY
— Reconfigurable Logic
— Reprogrammable Cells
— 100% Tested/100% Yields
— High Speed Electrical Erasure (<100ms)
— 20 Year Data Retention
• EIGHT OUTPUT LOGIC MACROCELLS
— Maximum Flexibility for Complex Logic Designs
— Programmable Output Polarity
— Also Emulates 24-pin PAL
®
Devices with Full Func-
tion/Fuse Map/Parametric Compatibility
• PRELOAD AND POWER-ON RESET OF ALL REGISTERS
— 100% Functional Testability
• APPLICATIONS INCLUDE:
— DMA Control
— State Machine Control
— High Speed Graphics Processing
— Standard Logic Speed Upgrade
• ELECTRONIC SIGNATURE FOR IDENTIFICATION
I/CLK
I
IMUX
I
CLK
I/O/Q
8
OLMC
I
I/O/Q
8
OLMC
I
I/O/Q
8
OLMC
I
I/O/Q
8
OLMC
I
I/O/Q
8
OLMC
I
I/O/Q
8
OLMC
I
I/O/Q
8
OLMC
I
I/O/Q
8
OLMC
I
OE
I
I
I/OE
IMUX
DESCRIPTION
The GAL20V8C, at 5ns maximum propagation delay time, com-
bines a high performance CMOS process with Electrically Eras-
able (E
2
) floating gate technology to provide the highest speed
performance available in the PLD market. High speed erase times
(<100ms) allow the devices to be reprogrammed quickly and ef-
ficiently.
The generic architecture provides maximum design flexibility by
allowing the Output Logic Macrocell (OLMC) to be configured by
the user. An important subset of the many architecture configu-
rations possible with the GAL20V8 are the PAL
architectures
listed in the table of the macrocell description section. GAL20V8
devices are capable of emulating any of these PAL architectures
with full function/fuse map/parametric compatibility.
Unique test circuitry and reprogrammable cells allow complete
AC, DC, and functional testing during manufacture. As a result,
Lattice Semiconductor delivers 100% field programmability and
functionality of all GAL products. In addition, 100 erase/write
cycles and data retention in excess of 20 years are specified.
PIN CONFIGURATION
DIP
PLCC
1
24
Vcc
I
I/O/Q
I/O/Q
I/O/Q
I/O/Q
I/O/Q
I/O/Q
I/O/Q
I/CLK
I
I
I
I
I
GAL
20V8
4
2
28
26
I
I
I
5
25
I/O/Q
I/O/Q
7
6
23
I/O/Q
GAL20V8
Top View
NC
NC
18
I
I
I
I
I
9
21
I/O/Q
I/O/Q
I
I
I
11
19
I/O/Q
12
14
16
18
I/O/Q
I
I/OE
GND
12
13
Copyright © 1997 Lattice Semiconductor Corp. All brand or product names are trademarks or registered trademarks of their respective holders. The specifications and information herein are subject
to change without notice.
LATTICE SEMICONDUCTOR CORP., 5555 Northeast Moore Ct., Hillsboro, Oregon 97124, U.S.A.
July 1997
Tel. (503) 681-0118; 1-888-ISP-PLDS; FAX (503) 681-3037; http://www.latticesemi.com
1
20v8_02
Specifications
GAL20V8
GAL20V8 ORDERING INFORMATION
Commercial Grade Specifications
T
(
T
(
T
(
I
(
O
#
P
5
3
4
1
G
2
P
7
7
5
1
2
P
G
C
-
1
G
2
P
D
1
G
2
P
1
1
7
1
2
P
G
C
-
1
G
2
P
D
1
G
2
P
1
1
1
5
G
2
P
D
5
G
2
P
9
G
2
P
D
9
G
2
P
2
1
1
5
G
2
P
D
5
G
2
P
9
G
2
P
D
9
G
2
P
Industrial Grade Specifications
T
(
T
(
T
(
I
(
O
#
P
1
1
7
1
2
P
G
C
-
1
G
2
P
D
1
G
2
P
1
1
1
1
G
2
P
D
1
G
2
P
2
1
1
6
G
2
P
D
6
G
2
P
2
1
1
6
G
2
P
D
6
G
2
P
1
G
2
P
D
1
G
2
P
PART NUMBER DESCRIPTION
_
XXXXXXXX
XX
X
X
X
GAL20V8C
GAL20V8B
Device Name
Grade
Blank = Commercial
I = Industrial
Speed (ns)
L = Low Power
Q = Quarter Power
Power
Package
P = Plastic DIP
J = PLCC
2
Specifications
GAL20V8
OUTPUT LOGIC MACROCELL (OLMC)
The following discussion pertains to configuring the output logic
macrocell. It should be noted that actual implementation is ac-
complished by development software/hardware and is completely
transparent to the user.
PAL Architectures
GAL20V8
Emulated by GAL20V8
Global OLMC Mode
20R8
Registered
There are three global OLMC configuration modes possible:
simple
,
complex
, and
registered
. Details of each of these
modes is illustrated in the following pages. Two global bits, SYN
and AC0, control the mode configuration for all macrocells. The
XOR bit of each macrocell controls the polarity of the output in any
of the three modes, while the AC1 bit of each of the macrocells
controls the input/output configuration. These two global and 16
individual architecture bits define all possible configurations in a
GAL20V8 . The information given on these architecture bits is
only to give a better understanding of the device. Compiler soft-
ware will transparently set these architecture bits from the pin
definitions, so the user should not need to directly manipulate
these architecture bits.
20R6
Registered
20R4
Registered
20RP8
Registered
20RP6
Registered
20RP4
Registered
20L8
Complex
20H8
Complex
20P8
Complex
14L8
Simple
16L6
Simple
18L4
Simple
20L2
Simple
14H8
Simple
16H6
Simple
18H4
Simple
The following is a list of the PAL architectures that the GAL20V8
can emulate. It also shows the OLMC mode under which the
devices emulate the PAL architecture.
20H2
Simple
14P8
Simple
16P6
Simple
18P4
Simple
20P2
Simple
COMPILER SUPPORT FOR OLMC
Software compilers support the three different global OLMC
modes as different device types. These device types are listed
in the table below. Most compilers have the ability to automati-
cally select the device type, generally based on the register usage
and output enable (OE) usage. Register usage on the device
forces the software to choose the registered mode. All combina-
torial outputs with OE controlled by the product term will force the
software to choose the complex mode. The software will choose
the simple mode only when all outputs are dedicated combinatorial
without OE control. The different device types listed in the table
can be used to override the automatic device selection by the
software. For further details, refer to the compiler software
manuals.
In
registered mode
pin 1 and pin 13 (DIP pinout) are permanently
configured as clock and output enable, respectively. These pins
cannot be configured as dedicated inputs in the registered mode.
In
complex mode
pin 1 and pin 13 become dedicated inputs and
use the feedback paths of pin 22 and pin 15 respectively. Because
of this feedback path usage, pin 22 and pin 15 do not have the
feedback option in this mode.
In
simple mode
all feedback paths of the output pins are routed
via the adjacent pins. In doing so, the two inner most pins ( pins
18 and 19) will not have the feedback option as these pins are
always configured as dedicated combinatorial output.
When using compiler software to configure the device, the user
must pay special attention to the following restrictions in each
mode.
Registered
Complex
Simple
Auto Mode Select
ABEL
P20V8R
P20V8C
P20V8AS
P20V8
CUPL
G20V8MS
G20V8MA
G20V8AS
G20V8
LOG/iC
GAL20V8_R
GAL20V8_C7
GAL20V8_C8
GAL20V8
OrCAD-PLD
"Registered"
1
"Complex"
1
"Simple"
1
GAL20V8A
PLDesigner
P20V8R
2
P20V8C
2
P20V8C
2
P20V8A
TANGO-PLD
G20V8R
G20V8C
G20V8AS
3
G20V8
1) Used with
Configuration
keyword.
2) Prior to Version 2.0 support.
3) Supported on Version 1.20 or later.
3
Specifications
GAL20V8
REGISTERED MODE
In the Registered mode, macrocells are configured as dedicated
registered outputs or as I/O functions.
mode. Dedicated input or output functions can be implemented
as subsets of the I/O function.
Architecture configurations available in this mode are similar to
the common 20R8 and 20RP4 devices with various permutations
of polarity, I/O and register placement.
Registered outputs have eight product terms per output. I/Os have
seven product terms per output.
The JEDEC fuse numbers, including the User Electronic Signature
(UES) fuses and the Product Term Disable (PTD) fuses, are
shown on the logic diagram on the following page.
All registered macrocells share common clock and output enable
control pins. Any macrocell can be configured as registered or
I/O. Up to eight registers or up to eight I/Os are possible in this
CLK
Registered Configuration for Registered Mode
- SYN=0.
- AC0=1.
- XOR=0 defines Active Low Output.
- XOR=1 defines Active High Output.
- AC1=0 defines this output configuration.
- Pin 1 controls common CLK for the registered outputs.
- Pin 13 controls common OE for the registered outputs.
- Pin 1 & Pin 13 are permanently configured as CLK &
OE.
DQ
Q
XOR
OE
Combinatorial Configuration for Registered Mode
- SYN=0.
- AC0=1.
- XOR=0 defines Active Low Output.
- XOR=1 defines Active High Output.
- AC1=1 defines this output configuration.
- Pin 1 & Pin 13 are permanently configured as CLK &
OE.
XOR
Note: The development software configures all of the architecture control bits and checks for proper pin usage automatically.
4
Specifications
GAL20V8
REGISTERED MODE LOGIC DIAGRAM
DIP (PLCC) Package Pinouts
1(2)
2640
0
4
8
12
16
20
24
28
32
36
PTD
2(3)
23(27)
0000
OLMC
22(26)
XOR-2560
AC1-2632
0280
3(4)
0320
OLMC
21(25)
XOR-2561
AC1-2633
0600
4(5)
0640
OLMC
20(24)
XOR-2562
AC1-2634
0920
5(6)
0960
OLMC
19(23)
XOR-2563
AC1-2635
1240
6(7)
1280
OLMC
18(21)
XOR-2564
AC1-2636
1560
7(9)
1600
OLMC
17(20)
XOR-2565
AC1-2637
1880
8(10)
1920
OLMC
16(19)
XOR-2566
AC1-2638
2200
9(11)
2240
OLMC
15(18)
XOR-2567
AC1-2639
2520
10(12)
11(13)
14(17)
OE
13(16)
2703
SYN-2704
AC0-2705
5
Plik z chomika:
Kot_Maciek
Inne pliki z tego folderu:
1N4148.PDF
(46 KB)
AT43312.PDF
(157 KB)
BC547.PDF
(70 KB)
BC557.PDF
(70 KB)
BAT43.PDF
(96 KB)
Inne foldery tego chomika:
Zgłoś jeśli
naruszono regulamin