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GAL16V8ZD-12QP Datasheet(PDF) 4 Page - Lattice Semiconductor |
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GAL16V8ZD-12QP Datasheet(HTML) 4 Page - Lattice Semiconductor |
4 / 19 page Specifications GAL16V8Z GAL16V8ZD 4 In the Registered mode, macrocells are configured as dedicated registered outputs or as I/O functions. Architecture configurations available in this mode are similar to the common 16R8 and 16RP4 devices with various permutations of polarity, I/O and register placement. 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 mode. Dedicated input or output functions can be implemented as subsets of the I/O function. Registered outputs have eight product terms per output. I/Os have seven product terms per output. Pin 4 is used as dedicated power-down pin on GAL16V8ZD. It cannot be used as functional input. 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. 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 11 are permanently configured as CLK & OE for registered output configuration. 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 11 controls common OE for the registered outputs. - Pin 1 & Pin 11 are permanently configured as CLK & OE for registered output configuration. Note: The development software configures all of the architecture control bits and checks for proper pin usage automatically. DQ Q CLK OE XOR XOR Registered Mode |
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