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CMOS Peripherals CDP1879, CDP1879C-1 iN'f RESET POWER DOWN iii) X-O/MEM TPB/Wii TPA CS A2 AI AD VSS' I 2 5 4 5 6 7 B 9 10 II 12 24 VDD 23 XTAL 22 XTAL 21 CLOCK OUT 20 DB7 19 DBS IB DBS 17 OB4 16 OB3 15 OB2 14 OBl 15 OBO 92CS-54345RI TERMINAL ASSIGNMENT CMOS Real-Time Clock Features
CDP1879, CDP1879C-1 March 1997 CMOS Real-Time Clock Description The CDP1879 real-time clock supplies time and calendar information from seconds to months in BCD format. It consists of 5 separately addressable and programmable counters that divide down an oscillator input. The clock input can have a
CMOS Peripherals CDP1879, CDP1879C-1 iN'f RESET POWER DOWN iii) X-O/MEM TPB/Wii TPA CS A2 AI AD VSS' I 2 5 4 5 6 7 B 9 10 II 12 24 VDD 23 XTAL 22 XTAL 21 CLOCK OUT 20 DB7 19 DBS IB DBS 17 OB4 16 OB3 15 OB2 14 OBl 15 OBO 92CS-54345RI TERMINAL ASSIGNMENT CMOS Real-Time Clock Features
CMOS Peripherals CDP1878, CDP1878C TNT TAO TAO TAG TACL Rii X-OIMEM TPBiWR TPA CS AO AI A2 VSS 3 4 7 8 9 10 II 12 13 14 TOP 28 VDD 27 DB7 26 DB6 25 DBS 24 DB4 23 DB3 22 OB2 21 OBI 20 DBO 19 TBO 18 TIll 17 TBG 16 TBCL IS mET VIEW 92CS-34626 TERMINAL ASSIGNMENT CMOS Dual Counter-Timer Features:
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 VI
CDP1877, CDP1877C March 1997 Programmable Interrupt Controller (PIC) Description The CDP1877 and CDP1877C are programmable 8-level interrupt controllers designed for use in CDP1800 series microprocessor systems. They provide added versatility by extending the number of permissible interrupts from 1
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