EP2S180 ALTERA [Altera Corporation], EP2S180 Datasheet - Page 52

• Manufacturer Part Number: EP2S180
• Description: DSP Development Board
• Manufacturer: ALTERA [Altera Corporation]

Expansion Interfaces
2–44
Stratix II EP2S180 DSP Development Board Reference Manual
J29 is a standard DB-9 serial connector. This connector is typically used
for communication with a host computer using a standard 9-pin serial
cable connected to (for example) a COM port. Level-shifting buffers (U52
and U58) are used between J29 and the Stratix II device, because the
Stratix II device cannot interface to RS-232 voltage levels directly.
J29 is able to transmit all RS-232 signals. The Stratix II design may use
only the signals it needs, such as J29’s RXD and TXD. LEDs are connected
to the RXD and TXD signals, giving a visual indication when data is being
transmitted or received.
the serial connector and the Stratix II device.
Figure 2–9. Serial Connector J29
Table 2–36
TXD
RXD
DTR
DCD
DSR
RI
CTS
RTS
Table 2–36. RS-232C Serial Interface Pin-
Outs
Signal
Core Version a.b.c variable
shows the pin-outs for the RS-232C interface.
J19
Figure 2–9
Stratix II Pin
H14
L17
L16
K13
K16
K17
K15
L15
Function
Direction
Stratix II Pin #
Connector Pin #
Connector Pin #
StratixII Pin #
Direction
Function
shows the pin connections between
GND
5
OUT
K17
RI1
9
DTR1
K13
IN
4
CTS1
OUT
K15
8
RXD1
L16
IN
3
RTS1
L15
IN
7
TXD1
OUT
L17
2
DSR1
OUT
K16
DCD1
6
OUT
H14
Altera Corporation
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