Terminal I/O Port Connector (P2) Pin Assignments - Motorola M68HC11EVBU User Manual

SUPPORT INFORMATION
Table 6-2. Terminal I/O Port Connector (P2) Pin Assignments
Pin Number Signal Mnemonic
1
2
3
4
5
6
7 SIG-GND
8
9-19
20
21-25
6-2
GND PROTECTIVE GROUND
RXD RECEIVED DATA – Serial data input line.
TXD TRANSMITTED DATA – Serial data output line.
NC Not connected.
CTS CLEAR TO SEND – An output signal used to indicate ready-to-
transfer data status. This pin is connected to both DSR pin 6 and
DCD pin 8.
DSR DATA SET READY – An output signal used to indicate an on-
line/in-service/active status. This pin is connected to both CTS pin
5 and DCD pin 8.
SIGNAL GROUND – This line provides signal ground or common
return connection (common ground reference) between the EVBU
and RS-232C compatible terminal.
DCD DATA CARRIER DETECT – An output signal used to indicate an
acceptable received line (carrier) signal has been detected. This
pin is connected to both CTS pin 5 and DSR pin 6.
NC Not connected.
DTR DATA TERMINAL READY – An input line used to indicate an on-
line/in-service/active status.
NC Not connected.
Signal Name And Description
M68HC11EVBU/D