I/O Connectors and Signals
3-7
Operation
3.3.2
J9: Serial1 RS-232 Connector
This connector is available for use with the second UART in the MSC1211.
Only the TD and RD lines are used. The DTR pin is connected to the DSR
pin, and the RTS pin is connected to the CTS pin.
In the RS-232 electrical specification, –5V to –15V on a line indicates a log-
ic high (mark), and +5V to +15V indicates logic low (space). Line states are
described here according to their logical states.
Signal descriptions are described in Table 3–5.
Table 3–5. J8: RS-232 Port Pinout
Pin
Number
Signal
Name
RS-232
Name
Direction
(at board)
Function
1
DCD
Data Carrier Detect
Output
None
2
RD
Receive Data
Output
Serial data output to the host PC
3
TD
Transmit Data
Input
Serial data input from the host PC
4
DTR
Data Terminal Ready
Input
Connected to DSR
5
SG
Signal Ground
Power
Ground reference
6
DSR
Data Set Ready
Output
Connected to DTR
7
RTS
Request To Send
Input
Connected to CTS
8
CTS
Clear To Send
Output
Connected to RTS
9
RI
Ring Indicator
Output
None
Содержание MSC1211
Страница 1: ... April 2003 User s Guide SBAU086 ...
Страница 29: ...Schematics 4 2 4 1 Schematics Figure 4 1 Processor Schematic ...
Страница 30: ...Schematics 4 3 Physical Description Figure 4 2 Power and Analog Inputs Schematic ...
Страница 31: ...Component Locations 4 4 4 2 Component Locations Figure 4 3 Printed Circuit Board Layout ...
Страница 32: ...Power Supply CE Certification 4 5 Physical Description 4 3 Power Supply CE Certification ...
