PAL PAL16H8 O Programmable Array Logic ◆PAL10H8 PALs÷ fixed oR array◆PRoM 10为输入端总数,8为输出单元数 ◆ Example:PAL10H8· PROMs fixed AND arra ●8个输出:各含1个或门,每个或门接收8个积项 ●通过与矩阵编程可实现“与一或形式组合逻辑函数 PAL16 PAL PAL16L8 O Another Example: PAL16L8 O Note inversion on outputs ●16 inputs ● Complement of SOP 10 Dedicated Inputs ◆10 inputs 2 Dedicated Outputs ◆8 outputs,with7ANDs per output, 1 AND for 3- state Enable PAL16L8 Sequential PALs ◆PAL16L8 ◆PAL16R8 10个输入,另6个O端 8个输出,含6个Q端和2个专用输出端(O1和O ●三态门由与矩阵1个积项控制,或门接收7个积项 ●低申平有效:与编程实现“与一或非”组合逻辑 ●输出可编程:EN=1时可实现引脚反馈( Feed Pin)3 13 PAL ‹Programmable Array Logic z PALs Æ fixed OR array ‹Example: PAL10H8 0 1 2 3 4 5 6 7 0 1 2 3 … … … … 18 19 I 1 O1 ‹PROM z PROMs Æ fixed AND array 14 ‹PAL10H8 z10为输入端总数，8为输出单元数 z8个输出：各含1个或门，每个或门接收8个积项 z高电平有效 z通过与矩阵编程可实现“与—或”形式组合逻辑函数 PAL16H8 0 1 2 3 4 5 6 7 0 1 2 3 … … … … 18 19 I 1 O1 15 PAL ‹Another Example: PAL16L8 z 16 inputs z 8 outputs 6 I/Os 10 Dedicated Inputs 2 Dedicated Outputs 16 ‹Note inversion on outputs z Complement of SOP ‹10 inputs ‹8 outputs, with 7 ANDs per output, 1 AND for 3- state Enable ‹6 I/Os PAL16L8 17 PAL16L8 ‹PAL16L8 z10个输入，另 6个I/O端 z 8 个输出，含 6个I/O端和2个专用输出端(O1和O8) z三态门由与矩阵1个积项控制，或门接收7个积项 z低电平有效：与编程实现“与—或非” 组合逻辑 z输出可编程：EN=1时可实现引脚反馈(Feed Pin) 18 Sequential PALs ‹PAL16R8