sharpie7
Question: Memory
How can I add a ROM or a flash memory to my circuit, or if it is not there, can it be included?
Use the Static Ram under "digital chips".
You can use it like a ROM. Just don't write to it. 🙂
yes, you can load the static ram using right click, Edit, Contents.
What's your other question? I can't tell what's on the static RAM by looking at a picture of it.
The WE is "write enable". That should be low (0V) when writing, high (5V) when reading. So if you are making a ROM, that should always be 5V.
The OE is "output enable". The RAM is enabled when low (0V), disabled when high (5V).
A0-A3 are the address pins, and D0-D3 are the data pins.
does it have four serial ports or can I send four bits on a parallel port?
well, it's got 4 address pins and 4 data pins so it can store 2^4 = 16 4-bit words, or 8 bytes.
I guess you could call it a parallel port. The data bits are accessed in parallel.
could you give me an example of something when I enter something in advance on the edit and then it reads it and writes it to a scope with an out?