CMOS Peripherals _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ CDP1877, CDP1877C CASCAi5E iR7 iRS iRS IR4 iR3 iRl! iRi iRO TPA TPB MWR MRD VSS I 28 VDD 2 27 8US7 3 26 8US6 4 25 BUS 5 5 24 8US4 6 23 8US 3 7 22 8US2 8 21 BUSI 9 20 BUSO 10 19 CS/Ax II 18 CS/Ay 12 17 CS 13 16 cs 14 15 iNT TOP VIEW 92CS-34371 TERMINAL ASSIGNMENT Programmable Interrupt Controller (PIC) Features: • Compatible with CDP1800 series • Programmable long branch vector address and vector interval • 8 levels of interrupt per chip • Easily expandable • Latched interrupt requests • Hard wired interrupt priorities • Memory mapped • Multiple chip select inputs to minimize address space requirements The RCA-COP1877 a...

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