Timeline for Why do microcontrollers have so little RAM?
Current License: CC BY-SA 3.0
9 events
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| Oct 17, 2014 at 8:41 | comment | added | domen | Yes, 512B, if I recall. You could just write an unefficient SD card driver, to discard first X bytes of data -> no "large" buffer needed. | |
| Oct 17, 2014 at 8:09 | comment | added | Peter Mortensen | @alex.forencich: Yes, but don't the SPI interface for operating an SDHC SD card require a buffer on the host side (embedded system/microcontroller) - in contrast to the older cards? That is, bit addressing is no longer possible for the newer (SDHC) cards? Or is it only dependent on the file system (bit addressing still possible)? Don't the newer cards require block transfers (and thus requiring a buffer of 256 or 512 bytes)? | |
| Oct 16, 2014 at 22:28 | comment | added | alex.forencich | @PeterMortensen Many SD cards have an integrated CPU of some sort to manage the flash. Some cards have a full 32 bit ARM core that likely has 16 or 32K of RAM attached to it. | |
| Oct 16, 2014 at 17:27 | comment | added | supercat | The version of Pac Man for the Atari 2600 Video Computer System was 4K ROM, and the VCS itself had 128 bytes of RAM. Many arcade machines had a fairly decent chunk of ROM and RAM, however, compared with home computers of the era. I think Defender, for example, had 32K or ROM and 64K of RAM, though 32K of RAM was "write-only" from the CPU's point of view (the processor would put data there which the display hardware would clock out to the monitor). | |
| Oct 16, 2014 at 15:27 | comment | added | Peter Mortensen | What about SD cards? Don't SDHC cards require a buffer of 256 or 512 bytes (the standard/old SD cards are no longer produced)? | |
| Oct 16, 2014 at 14:08 | history | edited | Randy | CC BY-SA 3.0 |
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| S Oct 16, 2014 at 14:06 | history | suggested | user | CC BY-SA 3.0 |
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| Oct 16, 2014 at 13:51 | review | Suggested edits | |||
| S Oct 16, 2014 at 14:06 | |||||
| Oct 15, 2014 at 22:33 | history | answered | Randy | CC BY-SA 3.0 |