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AN2552

ST16C2552 APPLICATION EXAMPLE

AN2552
Printed December 17, 1996
ST16C2552 APPLICATION EXAMPLE
Rev. 1.0
UARTS APPLICATION NOTE
JA1 SD7 SD6 SD5 SD4 SD3 SD2 SD1 SD0 9 8 7 6 5 4 3 2 A8 A7 A6 A5 A4 A3 A2 A1 74ALS245 B8 B7 B6 B5 B4 B3 B2 B1 D7 D6 D5 D4 D3 D2 D1 D0 11 12 13 14 15 16 17 18
AN2552
SA8 SAEN SA9 SA8 SA7 SA6 SA5 SA4 SA3 9 8 7 6 5 4 3 2 1 I9 I8 I7 I6 I5 I4 I3 I2 I1 PAL16L8 SA2 SA1 SA0 I10 O1 IO2 IO3 IO4 IO5 IO6 IO7 O8 11 12 13 14 15 16 17 18 19
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 3F8 2F8 3E8 2E8 378 278
IBMA VCC +12V
RESET VCC -12V +12V IOW IRQ7 IRQ5 IRQ4 IRQ3 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 GND 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 -12V
R2 10K U1 ST162552CJ 38 37 36 39 41 40 42 43 26 27 23
D0 D1 D2 D3 D4 D5 D6 D7 TXA DTRA RTSA RXA DSRA CTSA CDA RIA TXB DTRB RTSB 10 14 15 A0 A1 A2 IOR IOW CHSEL CS RESET 24 20 16 18 21 RXB DSRB CTSB CDB RIB INITA INITB MFA MFB X1 X2 35 19 1 34 17
TXA DTRA RTSA RXA DSRA CTSA CDA RIA TXB DTRB RTSB
SA0 SA1 SA2
IOR IOW
SA8 CS
RESET
RXB DSRB CTSB CDB RIB
CB1 0.1uF
CB2 0.1uF
CB3 0.1uF
AN2552
UARTS APPLICATION NOTE
1 32 TXRDYA TXRDYB 2 R1 1M X1 U2B 74LS125 1.8432 MHz 5 C1 27pF C2 27pF 6 U2A 74HC125
3F8 2F8 3E8 2E8
HDR2X4
J2 2 4 6 8 10 12 14 16 HDR2X8 IRQ3 IRQ4 IRQ5 IRQ7
+12V U4 TXA RTSA DTRA TXB MC1488CP -12V +12V VSS 1 OUTA OUTB OUTC OUTD 3 6 8 11 J3 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 U5 2 4 5 9 10 13 12 INA1 INB1 INB2 INC2 INC1 IND1 IND2 MC1488CP -12V U6 3 6 8 11 INA C1 INB C2 INC C3 IND C4 OUTA OUTB OUTC OUTD MC1489CP U8 3 6 8 11 INA C1 INB C2 INC C3 IND C4 RIA CDB DSRB RXB OUTA OUTB OUTC OUTD MC1489CP U7 3 6 8 11 CTSB RIB INA C1 INB C2 INC C3 IND C4 OUTA OUTB OUTC OUTD 1 2 4 5 10 9 13 12 1 2 4 5 10 9 13 12 J4 1 6 2 7 3 8 4 9 5 DB9RA / M 1 2 4 5 10 9 13 12 VDD OUTA OUTB OUTC OUTD VSS 14 3 6 8 11 1 DB25RA / M 2 4 5 9 10 13 12 INA1 INB1 INB2 INC2 INC1 IND1 IND2 VDD 14
RTSB DTRB
RXA CTSA DSRA CDA
AN2552
UARTS APPLICATION NOTE