User`s manual

SUPPORT INFORMATION
4-6 MPC505EVBUM/D
Table 4-4. Host Computer Connector P4 Pin Assignments
Pin Mnemonic Signal
1 NC Not Connected
2 CTXD TRANSMIT – RS-232C serial output signal.
3 CRXD RECEIVE DATA – RS-232C serial input signal.
4 CRTS REQUEST TO SEND – An input signal used to request permission to
transfer data.
5 CCTS* CLEAR TO SEND – An output signal that indicates a ready-to-transfer
data status.
6 ADSR* DATA SET READY – An output signal (held high) that indicates an on-
line/in-service/active status.
7 GND GROUND
8 CDCD* DATA CARRIER DETECT – An output signal used to indicate an
acceptable received line (carrier) signal has been detected.
9 - 19 NC Not Connected
20 ADTR* DATA TERMINAL READY – An output line that indicates an on-line/in-
service/active status.
21 - 25 NC Not Connected