DTE

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DTE P562-720px.jpg

Features[edit]

  • TTL to RS-232 converter
  • Male DB-9 connector
  • FTDI pinout (reversed directions to directly connect to FTDI Interface)
  • 49x49mm card
  • 4x 4-40 holes

DTE - RS-232 to TTL[edit]

  • The DTE (PC) has the male DB-9 connector

DTE DCE.png

  • The DCE (peripheral) has the DB-9 female.

H1 Connector[edit]

  • Pins signal directions are reversed from an FTDI card
    • Can be directly wired to FTDI connector

Pinout[edit]

  1. GND
  2. CTS (out)
  3. VCC (3.3V or 5V)
  4. TX (in)
  5. Rx (out)
  6. RTS (in)
  • Pins 4 and 6 are backwards on Rev 1 card - corrected on Rev 2 card

Test Procedure[edit]

DCE DTE Test P554 720px.jpg

  • FTDI-49MM
    • 3.3V/5V jumper set to 5V
    • Power cable from FTDI-49MM 5V Connector split to both DCE/DTE cards
  • DCE/DTE Cards
    • 9 pin connectors plugged together
  • FTDI loopback cable
    • TX/RX connected
    • RTSCTS connected
  • USB B cable to PC
  • Run PuTTY
    • 115,200 baud, RTS/CTS
  • Type and it comes back

SP232A Application[edit]

  • SP232ACN-L is 5V part
  • ICL3232IBNZ is 3.3V or 5V part

SP232A app.PNG

DCE (reference)[edit]

  • The DCE (Terminal) has the female connector

DTE Assembly Sheet[edit]