7.1 PL460-EK Modifications Required for Compatibility With Revision 5

Users need to make these changes in the PL460-EK revision 4 and earlier versions to work with the current firmware:

On the top side of the board, users need to make the changes shown in the figure below:
  1. Cut the "NRST" and "EN" traces by cutting pin 7 and pin 8 of the connector J2.
  2. Cut the "STBY" and "CD" traces by cutting pin 11 and pin 12 of the connector J2.
  3. Remove the R54 resistor and replace the C9 capacitor with a 10 kΩ resistor to implement a pull-down on the NRST signal.
On the bottom side of the board, users need to make the changes shown in the figure below:
  1. Connect the "NRST" trace by connecting pin 7 to pin 5 of the connector J2.
  2. Connect the "CD" trace by connecting pin 12 to pin 4 of the connector J2.
  3. Add a 10 kΩ pull-down resistor to the "STBY" trace by connecting a 10 kΩ through hole resistor between the pin 11 and the pin 19 of the connector J2.
  4. Add a 10 kΩ pull-up resistor to the “EN” trace by connecting a 10 kΩ through hole resistor between the pin 8 and the pin 20 of the connector J2.
The operating range of the Supply Monitor has been adjusted to support the platforms without requiring any modifications. To ensure compatibility with previous designs, R51 should be replaced with a 120 kΩ 1% resistor.
Table 7-1. Comparison of Xplained Pro Signals Between Revision 5 and Previous Versions
PinNameRev5 Signal NameRev4 Signal Name
1IDXPL_IDXPL_ID
2GNDGNDGND
3ADC+Supply MonitorSupply Monitor
4ADC-XPL_TXEN—
5GPIO1XPL_NRST—
6GPIO2XPL_ENABLE1—
7PWM+—XPL_NRST
8PWM-—XPL_ENABLE
9IRQ/GPIOXPL_EXTINXPL_EXTIN
10GPIOXPL_NTHW0XPL_NTHW0
11SDA—XPL_STBY
12SCL—XPL_TXEN
13RXDXPL_STBY2—
14TXDXPL_VZC3XPL_VZC3
15SSXPL_CSXPL_CS
16MOSIXPL_MOSIXPL_MOSI
17MISOXPL_MISOXPL_MISO
18SCKXPL_SCKXPL_SCK
19GNDGNDGND
20VCC3V33V3
Note:
  1. The XPL_ENABLE signal is not connected by default. If users need to control this signal, add resistor R71 (0Ω).
  2. The XPL_STBY signal is not connected by default. If users need to control this signal, add resistor R68 (0Ω).
  3. The XPL_VZC signal is not connected by default. If users need to control this signal, add resistor R57 (0Ω). See Zero-Crossing Detector Circuit for additional information.