Intel VC820 Design Guide - Page 188
Serial Ports
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8 7 Serial Ports D VCC3_3SBY 6 5 4 3 DCD#0 12 RXD0 12 DSR#0 12 DTR#0 12 TXD0 12 CTS#0 12 RTS#0 12 RI#0 12 VCC5 VCC12 U4 GD75232 20 VCC VCC12 1 19 RY0 RA0 2 18 RY1 RA1 3 17 RY2 RA2 4 16 DA0 DY0 5 15 DA1 DY1 6 14 RY3 RA3 7 13 DA2 DY2 8 12 RY4 RA4 9 11 GND VCC-12 10 VCC12- DCD0_C DSR0_C RXD0_C RTS0_C TXD0_C CTS0_C DTR0_C RI0_C R17 10K C 9 ICH_RI# RI_CR CR2 3BAT514C 2 47K R70 3 Q1 3 2N7002LT1 11 2 2 RI_Q C92 47K R69 1UF B VCC5 VCC12 DCD#1 12 RXD1 12 DSR#1 12 DTR#1 12 TXD1 12 CTS#1 12 RTS#1 12 RI#1 12 U6 GD75232 20 VCC VCC12 1 19 RY0 RA0 2 18 RY1 RA1 3 17 RY2 RA2 4 16 DA0 DY0 5 15 DA1 DY1 6 14 RY3 RA3 7 13 DA2 DY2 8 12 RY4 RA4 9 11 GND VCC-12 10 VCC12- DCD1_C RXD1_C DSR1_C DTR1_C TXD1_C CTS1_C RTS1_C RI1_C 6 100PF 8 100PF 6 100PF 8 100PF 5 100PF 3 CP1 7 100PF 1 CP1 5 100PF 3 CP8 7 100PF 1 CP8 4 CP1 2 CP1 4 CP8 2 CP8 2 COM1 J6 DB25_DB9_STK A1 DCD A6 DSR A2 RXD A7 RTS A3 TXD A8 CTS A4 DTR A9 RI A5 GND 1 D C COM2 J7 1 2 3 4 5 6 7 8 9 10 B COM2 is a 2x5 pin header for a cabled port. 4 CP7 3 CP7 5 100PF 7 100PF 5 100PF 2 CP7 6 100PF 6 100PF 4 CP6 1 CP7 2 CP6 8 100PF 7 100PF 3 CP6 8 100PF 1 CP6 A A TITLE: INTEL(R) 820 CHIPSET CUSTOMER REFERENCE BOARD REV: SERIAL PORTS 1.01 R PCD PLATFORM DESIGN DRAWN BY: PROJECT: 1900 PRAIRIE CITY ROAD FOLSOM, CALIFORNIA 95630 LAST REVISED: SHEET: 11-18-1999_11:22 25 OF 36 8 7 6 5 4 3 2 1