ST16C2552 APPLICATION EXAMPLE 7-25 UARTS APPLICATION NOTE

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ST16C2552 APPLICATION EXAMPLE 7-25 UARTS APPLICATION NOTE

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AN2552
ST16C2552 APPLICATION EXAMPLE
7-25
UARTS APPLICATION NOTE
74ALS245
AN2552
SAEN* PAL16L8
IOCK IORDY SA19 SA18 SA17 SA16 SA15 SA14 SA13 SA12 SA11 SA10
IBMA +12V
7-26
RESET -12V +12V IOW* IRQ7 IRQ5 IRQ4 IRQ3 IRQ9 DRQ2 -12V +12V SMEMW SMEMR DACK3 DRQ3 DACK1 DRQ1 IRQ7 IRQ6 IRQ5 IRQ4 IRQ3 DACK2 BALE -12V
IOR*
IBMB
ST162552CJ
DTRA RTSA DSRA CTSA DTRB RTSB CHSEL RESET DSRB CTSB INITA INITB
TXA* DTRA* RTSA* RXA* DSRA* CTSA* CDA* RIA* TXB* DTRB* RTSB*
IOR* IOW*
RESET
RXB* DSRB* CTSB* CDB* RIB*
0.1uF
0.1uF
0.1uF
AN2552
UARTS APPLICATION NOTE
7-27
TXRDYA TXRDYB 74LS125 1.8432 27pF 27pF 74HC125
HDR2X4
HDR2X8 IRQ3 IRQ4 IRQ5 IRQ7
+12V
+12V TXA* RTSA* DTRA* TXB* MC1488CP -12V +12V OUTA OUTB OUTC OUTD INA1 INB1 INB2 INC2 INC1 IND1 IND2 MC1488CP -12V OUTA OUTB OUTC OUTD MC1489CP RIA* CDB* DSRB* RXB* OUTA OUTB OUTC OUTD MC1489CP CTSB* RIB* OUTA OUTB OUTC OUTD DB9RA/M OUTA OUTB OUTC OUTD DB25RA/M INA1 INB1 INB2 INC2 INC1 IND1 IND2
+12V
-12V
-12V
RTSB* DTRB*
RXA* CTSA* DSRA* CDA*
AN2552
7-28
UARTS APPLICATION NOTE
NOTICE EXAR Corporation reserves right make changes products contained this publication order improve design, performance reliability. EXAR Corporation assumes responsibility circuits described herein, conveys license under patent other right, makes representation that circuits free patent infringement. Charts schedules contained here only illustration purposes vary depending upon user's specific application. While information this publication been carefully checked; responsibility, however, assumed inaccuracies. EXAR Corporation does recommend products life support applications where failure malfunction product reasonably expected cause failure life support system significantly affect safety effectiveness. Products authorized such applications unless EXAR Corporation receives, writing, assurances satisfaction that: risk injury damage been minimized; user assumes such risks; potential liability EXAR Corporation adequately protected under circumstances. Copyright 1994 EXAR Corporation Reproduction, part whole, without prior written consent EXAR Corporation prohibited.

ST16C2552 APPLICATION EXAMPLE 7-25 UARTS APPLICATION NOTE

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