7.x.x SDK compatibility with nRF51422 - V2 chips

[Mark Rages]

To support a mix of v2 and v3 chips, I want to use the 7.x SDK. But I'm not sure it's compatible. The matrix at infocenter.nordicsemi.com/.../nRF51_Series_Compatibility_Matrix_v2.3.pdf contains a blank space:

Is there meant to be an 7.x SDK there, or am I stuck maintaining two builds and SDK targets?

[RK]

There's blank space there because there's no SDK which has the 8.0.0 SD plus library code compatible with the rev 2 chip. The last SDK with library code for the rev2 chip is 6.1, however you can use softdevice v8 with rev2 (provided you set a couple of flags).

You're really better off using two builds and two SDKs, although you could use the 6.x SDK and the 8.x softdevice on both rev 2 and rev 3, that would work, just need to figure out which chip you have at runtime and turn the flags on, or not.

[Mark Rages]

Where would I look to find out which softdevices work with which SDK?