Here are the possible choices:

1) SPI Storm device: SPI, 3-wires SPI, dual-SPI, quad-SPI and custom serial protocol host adapter. 100 MHz max. frequency.
This device also features a 8-bit GPO (General-Purpose Output) port that can be used to generate arbitrary digital pattern generator.
SPI Storm is delivered with its own software, SPI Storm Studio.

2) SPI Xpress device: SPI Master (SPI host adapter) / Analyzer for 4 wires and 3 wires SPI protocols - 50 MHz max. frequency.

3) GP series device with SPI mode of operation option. - 50 MHz max. frequency when used as SPI master.

Xpress and GP Series are both delivered with 8PI Control Panel software.
SPI mode of operation is enabled for GP series devices in the 8PI Control Panel software.
This mode of operation is included with the SPI Xpress device and must be purchased separately for the GP series devices.

The SPI mode of operation that runs in 8PI Control Panel is exactly the same for GP and Xpress series. The devices used as a SPI master show the same performance.

The more recent SPI Storm device is delivered with a specific software (SPI Storm Studio) and also has got more capabilities than Xpress or GP series devices as for serial protocols. Like shown above, its maximum frequency is also much higher.

Your choice depends on whether you prefer going for:

- SPI Storm: more flexibility for standard AND custom protocol support, higher performance, specific software environment.
- Xpress series device : entry-level price, single function but non-upgradeable.
- GP series device: multi-function and upgradeable.

The table below compares SPI Storm, SPI Xpress and their closest competitor on the market: