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Pegasus Fast Start Guide 7460572 Rev A Page 5 of 12
SERIALPORTCONNECTOR(COM1)
Thisconnectorprovidesaccesstothe2serialportsfromtheCPUchip.Port1isRS‐232onlyandPort2
maybejumper‐configuredforRS‐232,RS‐422orRS‐485protocols.InRS‐422/485mode,theportmay
haveajumper‐selectable120
‐ohmterminationresistoracrosstheRXpins andjumper‐selectablepull‐
up/pull‐downresistorsontheTX/RXlines.TheRXresistorsareconfiguredsothattheportreadsbacka
0whenitisopencircuit.
RS‐232Configuration RS‐422Configuration RS‐485configuration
Port1 DCD1 1 2 DSR1
RXD1 3 4 RTS1
TXD1 5 6 CTS1
DTR 1 7 8 RI1
Ground 9 10 Ground
Port2 DCD2 11 12 DSR2NC 11 12 NC NC 11 12 NC
RXD2 13 14 RTS2TX+ 13 14 TX‐ RTX+ 13 14 RTX‐
TXD2 15 16 CTS2RX+ 15 16 RX‐ NC 15 16 NC
DTR 2 17 18 RI2NC 17 18 NC NC 17 18 NC
Ground 19 20 GroundGround 19 20 Ground Ground 19 20 Ground
USBCONNECTORS(USB1andUSB2)
TheseconnectorsprovideaccesstothefourUSB2.0 ports.Theshieldpinistiedtosystemground.The
key positions are missing to match the key position in the cable to prevent misconnection.Both
connectorshavethesamepinout.
Ground 1 2 +5V
Channel0Data+ 3 4 Channel0Data‐
Key 5 6 Ground
Ground 7 8 +5V
Channel1Data+ 9 10 Channel1Data‐
Ground
1 2 +5V
Channel2Data+ 3 4 Channel2Data‐
Key 5 6 Ground
Ground 7 8 +5V
Channel3Data+ 9 10 Channel3Data‐