TT provides 8 out, 8 in, and 8 bidir IOs plus rst and clk. For TT07, this design is running the Z80 core at 1/4 the project clock (so 12.5Mhz for the max 50MHz clock) and alternating between control, A0-A7, control, and A8-A15 on the out pins, D0-7 on the bidir pins, control inputs on the in pins:
https://github.com/rejunity/z80-open-silicon/blob/68438f00192e7b2388163e198b330567e6133cb7/src/tt_um_rejunity_z80.v#L24
The README implies that after prototyping on TT07 the plan is ChipIgnite runs for QFN44 and DIP40 packages (presumably classic Z80 pin-compatible).
Brian Swetland /
npub1pc…5rjk8
2024-04-28 19:27:38
in reply to nevent1q…g4l4
Author Public Key
npub1pcxszqyeekhg5uy4qrjx4jk65sq223xukk3azt8h4lhg724e7n3qg5rjk8Published at
2024-04-28 19:27:38Event JSON
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