10 PCBs of the V1.1-RC1 icezum Alhambra board have been manufactured at PCBWay. 3 of them has been mounted by hand for testing purposes.
This version has been founded by our backers (100). Thanks a lot! :-)
Changes from V1.0:
- TX/RX green leds added. Now there is a visual feedback when the FPGA is receiving or sending data through the serial port
- CFG Programming led: A yellow led is turn on when the FPGA is being reconfigured
- New pushbuttons: They have been changed by right angle pushbuttons. In addition, pull-down resistors have been added so there is no need to activate the internal FPGA pull-up resistors (It is now easier for the beginners to work with the buttons)
- New reset circuit to get proper levels at pin "R" (Reset)
- New test points scheme, accessible from top and bottom
- Improved design in power control circuit avoids spurious switch-on on hot plug-in
- Redesign of reverse polarity protection stage gets top performance on hot plug-in
- Continuous short-circuit from 5V to GND is now allowed
- Continuous short-circuit from 5V_P (peripherals supply) to GND is now allowed
- Power-up ramp control on 5V_P (peripherals supply) allows to switch-on peripherals without resetting the board (up to 2200 uF capacitive load supported)
- L4 ferrite reference modified for higher power capacity
- Pin J5-8 was Pwr (Vin controlled by the power switch), now it is directly connected to Vin
- LEDs colors modified: user LEDs now are green, power LED is blue
This version is stored in the v1.1-altium branch