DTE

DTE - RS-232 to TTL

• RS-232 to TTL converter
• The DTE (PC) has the male connector

• The DCE (peripheral) has the female.

H1 Connector (Rev 1)

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

1. GND
2. CTS (out)
3. VCC
4. TX (in)
5. Rx (out)
6. RTS (in)

• Pins 4 and 6 are backwards on Rev 1 card - corrected on Rev 2 card

H1 Connector (Rev 2)

• Signal referenced to H1 connector

1. GND
2. CTS (out)
3. VCC
4. Tx (in)
5. RX (out)
6. RTS (in)

SP232A Application

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

Test Procedure

• FTDI-49MM
• DCE/DTE Cards
  • Plugged together
• FTDI loopback cable
• Run PuTTY
  • 115,200 baud, RTS/CTS
• Type and it comes back

DCE (reference)

• The DCE (Terminal) has the female connector

DTE Assembly Sheet

• DTE Assembly Sheet