AN452 AN552 AN553 Printed December 17, 1996 ST16C452/552/553 APPLICATION EXAMPLE Rev. 1.0 7-34 IBMB GND RST +5V IRQ9 -5V DRQ2 -12V OWS +12V GND SMEMW SMEMR IOW IOR DACK3 DRQ3 DACK1 DRQ1 REF CLK IRQ7 IRQ6 IRQ5 IRQ4 IRQ3 DACK2 T/C BALE +5V OSC GND JB1 IBMA IOCK SD7 SD6 SD5 SD4 SD3 SD2 SD1 SD0 IORDY AEN SA19 SA18 SA17 SA16 SA15 SA14 SA13 SA12 SA11 SA10 SA9 SA8 SA7 SA6 SA5 SA4 SA3 SA2 SA1 SA0 JA1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 VCC -12V +12V J4 HDR1X3 9 8 7 6 5 4 3 2 1 19 1 2 3 4 5 6 7 8 9 I10 O1 IO2 IO3 IO4 IO5 IO6 IO7 O8 B1 B2 B3 B4 B5 B6 B7 B8 J5 HDR1X3 1.8432 MHz X1 PAL16L8 I9 I8 I7 I6 I5 I4 I3 I2 I1 U7 74LS245 G DIR A1 A2 A3 A4 A5 A6 A7 A8 U8 11 12 13 14 15 16 17 18 19 J6 HDR1X3 18 17 16 15 14 13 12 11 PD0 PD1 PD2 PD3 PD4 PD5 PD6 PD7 VCC 53 52 51 50 49 48 47 46 43 1 4 39 32 3 38 36 37 33 34 35 U6 21 20 19 18 17 16 15 14 ST16452CJ PD0 PD1 PD2 PD3 PD4 PD5 PD6 PD7 INTSEL BIDEN CLK RESET CSA CSB CSP IOW IOR A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0 INTA INTB INTP ERR SLCT PE ACK BUSY STRB AFDXT INIT SLCIN RXB DSRB CTSB CDB RIB TXB DTRB RTSB RXA DSRA CTSA CDA RIA TXA DTRA RTSA 45 60 59 63 65 67 68 66 55 56 57 58 62 5 13 8 6 10 11 12 41 31 28 29 30 26 25 24 PD0 PD1 PD2 PD3 PD4 PD5 PD6 PD7 PD0 PD1 PD2 PD3 PD4 PD5 PD6 PD7 ERROR SLCT PE ACK* BUSY* STROBE* AFDXT* INIT SLCTIN* RXB* DSRB* CTSB* CDB* RIB* TXB* DTRB* RTSB* RXA* DSRA* CTSA* CDA* RIA* TXA* DTRA* RTSA* UARTS APPLICATION NOTE AN452 7-35 CDB* RIB* RIA* RXB* CTSB* DSRB* RXA* CTSA* DSRA* CDA* DTRB* RTSB* TXB* DTRA* RTSA* TXA* INA1 INB1 INB2 INC2 INC1 IND1 IND2 INA1 INB1 INB2 INC2 INC1 IND1 IND2 OUTA OUTB OUTC OUTD OUTA OUTB OUTC OUTD 3 6 8 11 U4 OUTA OUTB OUTC OUTD MC1489CP 3 6 8 11 U5 MC1489CP 3 6 8 11 U3 MC1488CP 2 4 5 9 10 13 12 U2 MC1488CP 2 4 5 9 10 13 12 INA C1 INB C2 INC C3 IND C4 INA C1 INB C2 INC C3 IND C4 INA C1 INB C2 INC C3 IND C4 VSS OUTA OUTB OUTC OUTD VDD VSS OUTA OUTB OUTC OUTD VDD 14 1 2 4 5 10 9 13 12 1 2 4 5 10 9 13 12 1 2 4 5 10 9 13 12 1 3 6 8 11 14 1 3 6 8 11 -12V +12V -12V +12V 2 8 6 1 9 3 7 4 3 5 6 8 22 2 4 20 SERIAL9 RX CTS* DSR* CD* RI* TX RTS* DTR* J1 SERIAL25 RX CTS* DSR* CD* RI* TX RTS* DTR* J2 UARTS APPLICATION NOTE U1 AN452 PD0 PD1 PD2 PD3 PD4 PD5 PD6 PD7 C1 .0022uF ERROR SLCT BUSY* ACK* PE STROBE* AFDXT* INIT SLCTIN* C2 .0022uF C5 .0022uF C6 .0022uF PD0 7-36 C7 .0022uF P2 P1 C8 .0022uF PD2 P3 P2 P1 P0 GND C4 .0022uF 31 SIP8-ISO RP2 PD1 C3 .0022uF PD0 PD1 PD2 PD3 PD4 PD5 PD6 PD7 ERROR SLCT BUSY* ACK* PE STROBE* AFDXT* INIT SLCTIN* 31 SIP8-ISO RP1 P7 P6 P5 P4 P3 P2 P1 P0 SLCT PE BUSY* ACK* SLCTIN* INIT ERROR STROBE* AFDXT* gnd DB25/F 1 14 2 15 3 16 4 17 5 18 6 19 7 20 8 21 9 22 10 23 11 24 12 25 13 J3 UARTS APPLICATION NOTE AN452 PD7 P7 PD6 P6 PD5 P5 PD4 P4 PD3 P3 P0 P7 P6 P5 P4 NOTICE EXAR Corporation reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. Charts and schedules contained here in are only for illustration purposes and may vary depending upon a user’s specific application. While the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances. Copyright 1994 EXAR Corporation Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited.