Sundance SMT148FX - Manual (Page 14)

4.1.8 RS232
Two devices generate RS232 data (simple TX and RX); the FPGA and the USB2
controller.
The Rx data pin from a 9-way D-type connector is connected to both serial
interfaces. The Tx data pin from each device is routed to a jumper block (JP12)
which allows the selection of one Tx data output. The RS232 levels are generated
using a MAX3227 converter.
1
2 Rx
3 Tx
4
5 GND
6
7
8
9
Insert only one jumper in positions shown in section 7.
4.1.9 Flash
The flash memory connected to the CPLD and contains configuration data for the
two FPGAs.
Any additional space within this device can be used to store application programs.
The flash can be directly programmed by the CPLD only.
The external ComPort is directly connected to the CPLD. This allows the
reprogramming of the flash using an identical procedure as that employed on the
SMT348. After configuration, the CPLD ComPort is tri-stated and the external
ComPort functions as an input to the ComPort switch (Spartan 3).
User Manual SMT148FX Page 14 of 48 Last Edited: 03/08/2009 11:42:00