12
0364J–PLD–7/05
ATF16V8B/BQ/BQL
11.2
ATF16V8B Complex Mode
PAL Device Emulation/PAL Replacement. In the complex mode, combinatorial output and I/O
functions are possible. Pins 1 and 11 are regular inputs to the array. Pins 13 through 18 have pin
feedback paths back to the AND-array, which makes full I/O capability possible. Pins 12 and 19
(outermost macrocells) are outputs only. They do not have input capability. In this mode, each
macrocell has seven product terms going to the sum term and one product term enabling the
output.
Combinatorial applications with an OE requirement will make the compiler select this mode. The
following devices can be emulated using this mode:
16L8
16H8
16P8
Figure 11-4. Complex Mode Option
Summary of Contents for ATF16V8B
Page 11: ...11 0364J PLD 7 05 ATF16V8B BQ BQL Figure 11 3 Registered Mode Logic Diagram ...
Page 13: ...13 0364J PLD 7 05 ATF16V8B BQ BQL Figure 11 5 Complex Mode Logic Diagram ...
Page 15: ...15 0364J PLD 7 05 ATF16V8B BQ BQL Figure 11 7 Simple Mode Logic Diagram ...
