Sundance SMT395 User Manual
Page 15
Version 1.1.7
Page 15 of 26
SMT395 User Manual
LED
The SMT395 has 7 LEDs.
The LED on the top right corner of the module (above P3 label) always displays the
state of the FPGA DONE pin. This LED is off when the FPGA is configured
(DONE=1) and on when it is not configured (DONE=0).
This LED should go on when the board is first powered up and go off when the FPGA
has been successfully programmed (this is the standard operation of the boot code
resident in the flash memory device). If the LED does not light at power-on, check
that you have the mounting pillars and screws fitted properly. If it stays on, the DSP
is not booting correctly, or is set to boot in a non-standard way.
Two of the LEDs (D7-D8) can be controlled with the LED register.
Writing 1 will illuminate the LED; writing 0 will turn it off.
Two of the LEDs (D9-D10) can be controlled by the FPGA but their use hasn’t been
allocated yet.
LED Register
LED 0x900D0000
31–4 3
2
1
0
TTL1
TTL0
LED
D8
LED
D7
RW,0 RW,0 RW,0 RW,0
The four remaining LEDs (D11-14) are connected to the C60’s GPIO pins 12-15.
TTL
The SMT395 has 4 TTL (TTL0, TTL1, TTL2 and TTL3) signals available on
connector JP3.
TTL0 and TTL1 have been mapped in the LED register and TTL2 and TTL3 are left
unconnected for future use.