User`s manual

SUPPORT INFORMATION
MPC505EVBUM/D 4-5
Table 4-3. RS-232C I/O Connector P3 Pin Assignments
Pin Mnemonic Signal
1 BDCD* DATA CARRIER DETECT – An output signal used to indicate an
acceptable received line (carrier) signal has been detected.
2 BRXD RECEIVE DATA – RS-232C serial input signal.
3 BTXD TRANSMIT – RS-232C serial output signal.
4 BDTR* DATA TERMINAL READY – An output line that indicates an on-line/in-
service/active status.
5 GND GROUND
6 BDSR* DATA SET READY – An output signal (held high) that indicates an on-
line/in-service/active status.
7 BRTS REQUEST TO SEND – An input signal used to request permission to
transfer data.
8 BCTS* CLEAR TO SEND – An output signal that indicates a ready-to-transfer
data status.
9 NC Not Connected