gal20v8zd-15qp Lattice Semiconductor Corp., gal20v8zd-15qp Datasheet - Page 8

• Manufacturer Part Number: gal20v8zd-15qp
• Description: Zero Power E2cmos Pld Gal
• Manufacturer: Lattice Semiconductor Corp.

In the Simple mode, macrocells are configured as dedicated inputs
or as dedicated, always active, combinatorial outputs.
Architecture configurations available in this mode are similar to the
common 14L8 and 16P6 devices with many permutations of ge-
neric output polarity or input choices.
All outputs in the simple mode have a maximum of eight product
terms that can control the logic. In addition, each output has pro-
grammable polarity.
Note: The development software configures all of the architecture control bits and checks for proper pin usage automatically.
Simple Mode
XOR
XOR
Vcc
Vcc
8
Pins 1(2) and 13(16) are always available as data inputs into the
AND array. The center two macrocells (pins 18(21) & 19(23)) can-
not be used in the input configuration.
Pin 4(5) is used as dedicated power-down pin on GAL20V8ZD. It
cannot be used as functional input.
The JEDEC fuse numbers including the UES fuses and PTD fuses
are shown on the logic diagram.
Combinatorial Output with Feedback Configuration
for Simple Mode
Combinatorial Output Configuration for Simple Mode
Dedicated Input Configuration for Simple Mode
- SYN=1.
- AC0=0.
- XOR=0 defines Active Low Output.
- XOR=1 defines Active High Output.
- AC1=0 defines this configuration.
- All OLMC except pins 18(21) & 19(23) can be
- SYN=1.
- AC0=0.
- XOR=0 defines Active Low Output.
- XOR=1 defines Active High Output.
- AC1=0 defines this configuration.
- Pins 18(21) & 19(23) are permanently configured to
- SYN=1.
- AC0=0.
- XOR=0 defines Active Low Output.
- XOR=1 defines Active High Output.
- AC1=1 defines this configuration.
- All OLMC except pins 18(21) & 19(23) can be
configured to this function.
this function.
configured to this function.
Specifications GAL20V8Z
GAL20V8ZD