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zik80 [2015/11/09 19:27]
skeezix
zik80 [2017/11/11 02:58] (current)
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 | CPU     | Zilog eZ80  | @green:​Yes!| Specifically:​ EZ80F93AZ020SG | | CPU     | Zilog eZ80  | @green:​Yes!| Specifically:​ EZ80F93AZ020SG |
 | RAM     | 128KB main RAM (easily changed in design); theres also 4KB SRAM built into the CPU, but thats a little cheating; maybe use it for stack, nice and fast. | @green:Yes! | The eZ80 can actually manage up to 16MB of RAM, but current target is for kit to default to 128KB; fairly trivial to solder in larger pieces if you need .. headers should be exposed | | RAM     | 128KB main RAM (easily changed in design); theres also 4KB SRAM built into the CPU, but thats a little cheating; maybe use it for stack, nice and fast. | @green:Yes! | The eZ80 can actually manage up to 16MB of RAM, but current target is for kit to default to 128KB; fairly trivial to solder in larger pieces if you need .. headers should be exposed |
 +| RAM     | 512KB       | @green: Yes!     | r3 and later pcb can support the higher RAM sizes; added up to 512KB in case I want to run an ancient Linux, or various other operating systems.. |
 | CPU Speed | 20MHz (or less) | @green:​Yes!| Driven by a crystal .. use any speed you like up to 20MHz; it is also possible to drive the clock from the GPU (say), to make the speed variable; in practice, thats sort of goofy and confusing, so not in the earliest revision.. but maybe do later. For fun.| | CPU Speed | 20MHz (or less) | @green:​Yes!| Driven by a crystal .. use any speed you like up to 20MHz; it is also possible to drive the clock from the GPU (say), to make the speed variable; in practice, thats sort of goofy and confusing, so not in the earliest revision.. but maybe do later. For fun.|
 | CPU Peripherals | I²C, UART/USART serial, GPIO| @green:​Yes!| These are in the breakout headers, if you like| | CPU Peripherals | I²C, UART/USART serial, GPIO| @green:​Yes!| These are in the breakout headers, if you like|
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