EF_QSPI_XIP_CTRL

A QSPI XiP Flash COntroller with a parameterized Direct-Mapped Cache.

The wrapped IP

The IP comes with an AHBL Wrapper

Wrapped IP System Integration

EF_QSPI_XIP_CTRL_AHBL INST (
        .HCLK(CLK), 
        .HRESETn(RESETn), 
        .HADDR(HADDR), 
        .HWRITE(HWRITE), 
        .HSEL(HSEL), 
        .HTRANS(HTRANS), 
        .HWDATA(HWDATA),
        .HRDATA(HRDATA), 
        .HREADY(HREADY),
        .HREADYOUT(HREADYOUT),
        .sck(sck),
        .ce_n(ce_n),
        .din(din),
        .dout(dout),
        .douten(douten)
);

Implementation example

The following table is the result for implementing the EF_QSPI_XIP_CTRL IP with different wrappers using Sky130 PDK and OpenLane2 flow.

Module	Number of cells	Max. freq
EF_QSPI_XIP_CTRL	1973	250
EF_QSPI_XIP_CTRL_AHBL	1973	250

The Interface

Module Parameters

Parameter	Description	Default Value
NUM_LINES	The cache number of lines.	16
LINE_SIZE	The cache line size in bytes.	32
RESET_CYCLES	The number of cycles needed for the s/w reset command; reset time = (RESET_CYCLES + 1) * 2 /(HCLK frequency).	999

Ports

Port	Direction	Width	Description
sck	output	1	SPI serial clock
ce_n	output	1	SPI chip select (Active Low).
dout	output	4	Flash controller SPI data out.
din	input	4	Flash controller SPI data in.
douten	output	4	Flash controller data out enable (Active Low)

Installation:

You can install the IP either by cloning this repository or by using IPM.

1. Using IPM:

• [Optional] If you do not have IPM installed, follow the installation guide here
• After installing IPM, execute the following command ipm install EF_QSPI_XIP_CTRL.

Note: This method is recommended as it automatically installs EF_IP_UTIL as a dependency.

2. Cloning this repo:

• Clone EF_IP_UTIL repository, which includes the required modules from the common modules library, ef_util_lib.v. git clone https://github.com/efabless/EF_IP_UTIL.git
• Clone the IP repository git clone github.com/efabless/EF_QSPI_XIP_CTRL