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User's Manual l MBa335x UM 0202 l © 2018, TQ-Systems GmbH
Page 28
4.2.6
RS-232
TQMa335x
D-Sub 9
(X15)
UART4
RS-232
transciever
Illustration 23:
Block diagram RS-232, X15
The TQMa335x UART4 interface is routed to transceiver SP3222E, which provides the signals according to the EIA/TIA-232-F
Standard at the 9-pin D-Sub connector X15. The handshake signals RTS# and CTS# are also available at X15.
The UART4 interface is used to output debug information.
Additional information (e.g.: default baud rate) can be found in the TQMa335x
Illustration 24:
Position of RS-232, X15
Table 46:
RS-232, component
Manufacturer / Number
Description
Yamaichi / DRA-09P11-ZN
9-pin D-Sub connector
Table 47:
Pinout RS-232, X15
Pin
Pin name
Signal
Dir.
Remark
1
DCD
n.c.
–
Not used
2
RXD
RS-232_RXD
I
3
TXD
RS-232_TXD
O
4
DTR
n.c.
–
Not used
5
DGND
DGND
P
6
DSR
n.c.
–
Not used
7
RTS
RS-232_RTS#
O
8
CTS
RS-232_CTS#
I
9
RI
n.c.
–
Not used
M1-2
DGND
DGND
P