FINAL
COM’L: H-5/7/10/15/25, Q-10/15/25
IND: H-10/15/25, Q-20/25
PALCE16V8 Family
EE CMOS 20-Pin Universal Programmable Array Logic
DISTINCTIVE CHARACTERISTICS
s
Pin and function compatible with all 20-pin
GAL devices
s
Electrically erasable CMOS technology
provides reconfigurable logic and full
testability
s
High-speed CMOS technology
— 5-ns propagation delay for “-5” version
— 7.5-ns propagation delay for “-7” version
s
Direct plug-in replacement for the PAL16R8
series and most of the PAL10H8 series
s
Outputs programmable as registered or
combinatorial in any combination
s
Peripheral Component Interconnect (PCI)
compliant
s
Programmable output polarity
s
Programmable enable/disable control
s
Preloadable output registers for testability
s
Automatic register reset on power up
s
Cost-effective 20-pin plastic DIP, PLCC, and
SOIC packages
s
Extensive third-party software and programmer
support through FusionPLD partners
s
Fully tested for 100% programming and
functional yields and high reliability
s
5 ns version utilizes a split leadframe for
improved performance
GENERAL DESCRIPTION
The PALCE16V8 is an advanced PAL device built with
low-power, high-speed, electrically-erasable CMOS
technology. It is functionally compatible with all 20-pin
GAL devices. The macrocells provide a universal device
architecture. The PALCE16V8 will directly replace the
PAL16R8 and PAL10H8 series devices, with the excep-
tion of the PAL16C1.
The PALCE16V8 utilizes the familiar sum-of-products
(AND/OR) architecture that allows users to implement
complex logic functions easily and efficiently. Multiple
levels of combinatorial logic can always be reduced to
sum-of-products form, taking advantage of the very
wide input gates available in PAL devices. The equa-
tions are programmed into the device through floating-
gate cells in the AND logic array that can be erased
electrically.
The fixed OR array allows up to eight data product terms
per output for logic functions. The sum of these products
feeds the output macrocell. Each macrocell can be pro-
grammed as registered or combinatorial with an active-
high or active-low output. The output configuration is
determined by two global bits and one local bit
controlling four multiplexers in each macrocell.
AMD’s FusionPLD program allows PALCE16V8 de-
signs to be implemented using a wide variety of popular
industry-standard design tools. By working closely with
the FusionPLD partners, AMD certifies that the tools
provide accurate, quality support. By ensuring that third-
party tools are available, costs are lowered because a
designer does not have to buy a complete set of new
tools for each device. The FusionPLD program also
greatly reduces design time since a designer can use a
tool that is already installed and familiar.
2-36
Publication#
16493
Rev.
D
Issue Date:
February 1996
Amendment
/0
AMD
BLOCK DIAGRAM
I
1
– I
8
CLK/I
0
8
Programmable AND Array
32 x 64
MACRO
MC
0
MACRO
MC
1
MACRO
MC
2
MACRO
MC
3
MACRO
MC
4
MACRO
MC
5
MACRO
MC
6
MACRO
MC
7
OE/I
9
I/O
0
I/O
1
I/O
2
I/O
3
I/O
4
I/O
5
I/O
6
I/O
7
16493D-1
CONNECTION DIAGRAMS
Top View
DIP/SOIC
CLK/I
0
I
1
I
2
I
3
I
4
I
5
I
6
I
7
I
8
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
CC
I/O
7
I/O
6
I/O
5
I/O
4
I/O
3
I/O
2
I/O
1
I/O
0
OE/I
9
I
3
I
4
I
5
I
6
I
7
4
5
6
7
8
9
I
8
I
2
PLCC/LCC
CLK/I
0
V
CC
I/O
7
3
I
1
2
1
20 19
18
17
16
15
14
I/O
6
I/O
5
I/O
4
I/O
3
I/O
2
16493D-2
10 11 12 13
OE/I
9
GND
I/O
0
I/O
1
16493D-3
Note:
Pin 1 is marked for orientation.
PIN DESIGNATIONS
CLK
GND
I
I/O
OE
V
CC
=
=
=
=
=
=
Clock
Ground
Input
Input/Output
Output Enable
Supply Voltage
PALCE16V8 Family
2-37
AMD
ORDERING INFORMATION
Commercial and Industrial Products
AMD programmable logic products for commercial and industrial applications are available with several ordering options. The
order number (Valid Combination) is formed by a combination of:
PAL
CE
16 V 8 H -5 P C /5
FAMILY TYPE
PAL = Programmable Array Logic
TECHNOLOGY
CE = CMOS Electrically Erasable
NUMBER OF
ARRAY INPUTS
OUTPUT TYPE
V = Versatile
NUMBER OF OUTPUTS
POWER
H = Half Power (90 – 125 mA I
CC
)
Q = Quarter Power (55 mA I
CC
)
SPEED
-5 = 5 ns t
PD
-7 = 7.5 ns t
PD
-10 = 10 ns t
PD
-15 = 15 ns t
PD
-20 = 20 ns t
PD
-25 = 25 ns t
PD
OPTIONAL PROCESSING
Blank = Standard Processing
PROGRAMMING DESIGNATOR
Blank = Initial Algorithm
/4 = First Revision
/5 = Second Revision
(Same Algorithm as /4)
OPERATING CONDITIONS
C = Commercial (0
°
C to +75
°
C)
I = Industrial (–40
°
C to +85
°
C)
PACKAGE TYPE
P = 20-Pin Plastic DIP (PD 020)
J = 20-Pin Plastic Leaded Chip
Carrier (PL 020)
S = 20-Pin Plastic Gull-Wing
Small Outline Package (SO 020)
Valid Combinations
PALCE16V8H-5
PALCE16V8H-7
PALCE16V8H-10
PALCE16V8Q-10
PALCE16V8H-15
PALCE16V8Q-15
PALCE16V8Q-20
PALCE16V8H-25
PALCE16V8Q-25
JC
PC, JC
PC, JC, SC, PI, JI
PC, JC, SC
PC, JC, SC, PI, JI
PC, JC
PI, JI
PC, JC, SC, PI, JI
PC, JC, PI, JI
/5
/4
/5
Valid Combinations
Valid Combinations lists configurations planned
to be supported in volume for this device. Consult
the local AMD sales office to confirm availability of
specific valid combinations and to check on newly
released combinations.
Blank,
/4
2-38
PALCE16V8H-5/7/10/15/25, Q-10/15/25 (Com’l)
H-10/15/25, Q-20/25 (Ind)
AMD
FUNCTIONAL DESCRIPTION
The PALCE16V8 is a universal PAL device. It has eight
independently configurable macrocells (MC
0
–
MC
7
).
Each macrocell can be configured as registered output,
combinatorial output, combinatorial I/O or dedicated in-
put. The programming matrix implements a program-
mable AND logic array, which drives a fixed OR logic
array. Buffers for device inputs have complementary
outputs to provide user-programmable input signal po-
larity. Pins 1 and 11 serve either as array inputs or as
clock (CLK) and output enable (OE), respectively, for all
flip-flops.
Unused input pins should be tied directly to V
CC
or GND.
Product terms with all bits unprogrammed (discon-
nected) assume the logical HIGH state and product
terms with both true and complement of any input signal
connected assume a logical LOW state.
The programmable functions on the PALCE16V8 are
automatically configured from the user’s design
specification. The design specification is processed by
development software to verify the design and create a
programming file (JEDEC). This file, once downloaded
to a programmer, configures the device according to the
user’s desired function.
The user is given two design options with the
PALCE16V8. First, it can be programmed as a standard
PAL device from the PAL16R8 and PAL10H8 series.
The PAL programmer manufacturer will supply device
codes for the standard PAL device architectures to be
used with the PALCE16V8. The programmer will pro-
gram the PALCE16V8 in the corresponding architec-
ture. This allows the user to use existing standard PAL
device JEDEC files without making any changes to
them. Alternatively, the device can be programmed as
a PALCE16V8. Here the user must use the PALCE16V8
device code. This option allows full utilization of the
macrocell.
11
0X
10
OE
V
CC
11
10
00
01
To
Adjacent
Macrocell
SL0 X
SG1
11
0X
D
SL1
X
CLK
Q
Q
10
11
0X
* SG1
SL0
X
10
I/O
X
From
Adjacent
Pin
16493D-4
*In macrocells MC
0
and MC
7
,
SG1 is replaced by
SG0
on the feedback multiplexer.
PALCE16V8 Macrocell
PALCE16V8 Family
2-39
AMD
Configuration Options
Each macrocell can be configured as one of the follow-
ing: registered output, combinatorial output, combinato-
rial I/O, or dedicated input. In the registered output
configuration, the output buffer is enabled by the
OE
pin.
In the combinatorial configuration, the buffer is either
controlled by a product term or always enabled. In the
dedicated input configuration, it is always disabled. With
the exception of MC
0
and MC
7
, a macrocell configured
as a dedicated input derives the input signal from an ad-
jacent I/O. MC
0
derives its input from pin 11 (OE) and
MC
7
from pin 1 (CLK).
The macrocell configurations are controlled by the con-
figuration control word. It contains 2 global bits (SG0
and SG1) and 16 local bits (SL0
0
through SL0
7
and SL1
0
through SL1
7
). SG0 determines whether registers will
be allowed. SG1 determines whether the PALCE16V8
will emulate a PAL16R8 family or a PAL10H8 family de-
vice. Within each macrocell, SL0
x
, in conjunction with
SG1, selects the configuration of the macrocell, and
SL1
x
sets the output as either active low or active high
for the individual macrocell.
The configuration bits work by acting as control inputs
for the multiplexers in the macrocell. There are four mul-
tiplexers: a product term input, an enable select, an out-
put select, and a feedback select multiplexer. SG1 and
SL0
x
are the control signals for all four multiplexers. In
MC
0
and MC
7
,
SG0
replaces SG1 on the feedback mul-
tiplexer. This accommodates CLK being the adjacent
pin for MC
7
and
OE
the adjacent pin for MC
0
.
use the feedback path of MC
7
and pin 11 will use the
feedback path of MC
0
.
Combinatorial I/O in a Non-Registered
Device
The control bit settings are SG0 = 1, SG1 = 1, and SL0
x
=
1. Only seven product terms are available to the OR
gate. The eighth product term is used to enable the out-
put buffer. The signal at the I/O pin is fed back to the
AND array via the feedback multiplexer. This allows the
pin to be used as an input.
Because CLK and
OE
are not used in a non-registered
device, pins 1 and 11 are available as inputs. Pin 1 will
use the feedback path of MC
7
and pin 11 will use the
feedback path of MC
0
.
Combinatorial I/O in a Registered Device
The control bit settings are SG0 = 0, SG1 = 1 and SL0
x
=
1. Only seven product terms are available to the OR
gate. The eighth product term is used as the output
enable. The feedback signal is the corresponding I/O
signal.
Dedicated Input Configuration
The control bit settings are SG0 = 1, SG1 = 0 and SL0
x
=
1. The output buffer is disabled. Except for MC
0
and MC
7
the feedback signal is an adjacent I/O. For MC
0
and MC
7
the feedback signals are pins 1 and 11. These configu-
rations are summarized in Table 1 and illustrated in
Figure 2.
Table 1. Macrocell Configuration
Registered Output Configuration
The control bit settings are SG0 = 0, SG1 = 1 and SL0
x
=
0. There is only one registered configuration. All eight
product terms are available as inputs to the OR gate.
Data polarity is determined by SL1
x
.
The flip-flop is
loaded on the LOW-to-HIGH transition of CLK. The
feedback path is from
Q
on the register. The output
buffer is enabled by
OE.
Combinatorial Configurations
The PALCE16V8 has three combinatorial output con-
figurations: dedicated output in a non-registered device,
I/O in a non-registered device and I/O in a registered
device.
SG0 SG1 SL0
X
Cell Configuration Devices Emulated
Device Uses Registers
0
1
0
Registered Output PAL16R8, 16R6,
16R4
0
1
1
Combinatorial I/O PAL16R6, 16R4
Device Uses No Registers
1
0
0
Combinatorial
PAL10H8, 12H6,
Output
14H4, 16H2, 10L8,
12L6, 14L4, 16L2
1
0
1
Input
PAL12H6, 14H4,
16H2, 12L6, 14L4,
16L2
1
1
1
Combinatorial I/O PAL16L8
Programmable Output Polarity
The polarity of each macrocell can be active-high or ac-
tive-low, either to match output signal needs or to
reduce product terms. Programmable polarity allows
Boolean expressions to be written in their most compact
form (true or inverted), and the output can still be of the
desired polarity. It can also save “DeMorganizing”
efforts.
Selection is through a programmable bit SL1
x
which
controls an exclusive-OR gate at the output of the AND/
OR logic. The output is active high if SL1
x
is 1 and active
low if SL1
x
is 0.
Dedicated Output in a Non-Registered
Device
The control bit settings are SG0 = 1, SG1 = 0 and SL0
x
=
0. All eight product terms are available to the OR gate.
Although the macrocell is a dedicated output, the feed-
back is used, with the exception of pins 15 and 16. Pins
15 and 16 do not use feedback in this mode. Because
CLK and
OE
are not used in a non-registered device,
pins 1 and 11 are available as input signals. Pin 1 will
2-40
PALCE16V8 Family
