pallv16v8 Lattice Semiconductor Corp., pallv16v8 Datasheet - Page 5

• Manufacturer Part Number: pallv16v8
• Description: Low Voltage, Zero Power 20-pin Ee Cmos Universal Programmable Array Logic
• Manufacturer: Lattice Semiconductor Corp.

Programmable Output Polarity
The polarity of each macrocell can be active-high or active-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
of the AND/OR logic. The output is active high if SL1
SG0
0
0
SG1
1
1
SL0 X
Device Uses Registers
0
1
Configuration
Combinatorial
Registered
Output
Cell
I/O
PALLV16V8-10 and PALLV16V8Z-20 Families
PAL16R8, 16R6,
PAL16R6, 16R4
Table 1. Macrocell Configuration
Emulated
Devices
16R4
x
which controls an exclusive-OR gate at the output
SG0
1
1
1
SG1
x
0
0
1
is 1 and active low if SL1
SL0 X
0
1
1
Device Uses No Registers
Configuration
Combinatorial
Combinatorial
Output
Input
Cell
I/O
PAL12H6, 14H4, 16H2, 12L6,
14H4, 16H2, 10L8, 12L6,
x
is 0.
PAL10H8, 12H6,
Emulated
14L4, 16L2
14L4, 16L2
Devices
PAL16L8
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