Visible to Intel only — GUID: sfo1410068754918
Ixiasoft
Visible to Intel only — GUID: sfo1410068754918
Ixiasoft
16.3. Quad SPI Flash Controller Signal Description
The quad SPI controller provides four chip select outputs to allow control of up to four external quad SPI flash devices. The outputs serve different purposes depending on whether the device is used in single, dual, or quad operation mode. The following table lists the I/O pin use of the quad SPI controller interface signals for each operation mode. For more information on which signals are available to the FPGA and HPS I/O, refer to the HPS Component Interfaces chapter.
Signal | Pin | Mode | Direction | Function |
---|---|---|---|---|
qspi_io0_i qspi_io0_o qspi_mo_oe[0] |
IO0 | Single |
Output |
Data output 0 |
Dual or quad |
Bidirectional |
Data I/O 0 |
||
qspi_io1_i qspi_io1_o qspi_mo_oe[1] |
IO1 | Single |
Input |
Data input 0 |
Dual or quad |
Bidirectional |
Data I/O 1 |
||
qspi_io2_i qspi_io2_wpn_o qspi_mo_oe[2] |
IO2_WPN | Single or dual |
Output |
Active low write protect |
Quad |
Bidirectional |
Data I/O 2 |
||
qspi_io3_i qspi_io3_hold_o qspi_mo_oe[3] |
IO3_HOLD | Single, dual, or quad |
Bidirectional |
Data I/O 3 |
qspi_ss_o[0] | SS0 | Single, dual, or quad |
Output |
Active low slave select 0 |
qspi_ss_o[1] | SS1 | Active low slave select 1 |
||
qspi_ss_o[2] | SS2 | Active low slave select 2 |
||
qspi_ss_o[3] | SS3 | Active low slave select 3 |
||
qspi_sclk_out |
CLK | Single |
Output |
QSPI serial clock output which connects to the FPGA core fabric |
qspi_s2f_clk |
QSPI serial clock output which connects to the FPGA clock network
Note: Use the qspi_s2f_clk as the serial clock output to an external SPI device.
|