Hi Steven,
thanks a lot for this comprehensive list of flash chip voltages and form
factors..
On 13.10.2010 01:49, Steven Zakulec wrote:
> Hello, some weeks ago I asked carldani what I could do to help the
> flashrom project, and he mentioned that they could really use someone
> to go thru all the chips in flashchips.c and get the voltage range and
> form factor(s) for each chip listed there.
>
> This is the result of that project: a spreadsheet with the chip name,
> voltage range, form factors, connector type (pins, leads, etc). This
> covers all the chips as of v1143.
> If anyone else is interested, I also have a short text file with all
> of the form factor acronyms I came across and what they mean (I
> grabbed the definition from the datasheet).
>
> There's a few missing chips, and some values that I wasn't quite sure
> about. Comments would be greatly appreciated.
>
I thought I had seen some SPI chips which were available for disjoint
voltage ranges, e.g. 1.8-2.5V and 2.7-3.6V. Maybe the names were
different for the various versions with different voltages. I hope I'll
stumble over such a datasheet again.
OK, now the next question is how we can store this info in struct
flashchip. Suggestion:
struct voltage {
uint8_t minvoltage_decivolt;
uint8_t maxvoltage_decivolt;
};
Values would be in 1/10 volts. I haven't seen any flash chip datasheets
with greater precision, and with such an encoding even 12V can be expressed.
For the form factor, I'd just use a large bitfield with one bit per
available form factor.
uint32_t formfactors;
#define PLCC32 (1 << 0)
#define TSOP32 (1 << 1)
#define TSOP40 (1 << 2)
...
Example:
{
.vendor = "SST",
.name = "SST49LF008A",
.bustype = CHIP_BUSTYPE_FWH, /* A/A Mux */
.manufacture_id = SST_ID,
.model_id = SST_SST49LF008A,
.total_size = 1024,
.page_size = 64 * 1024,
.feature_bits = FEATURE_REGISTERMAP | FEATURE_EITHER_RESET,
.tested = TEST_OK_PRE,
.probe = probe_jedec,
.probe_timing = 1, /* 150 ns */
.block_erasers =
{
{
.eraseblocks = { {4 * 1024, 256} },
.block_erase = erase_sector_jedec,
}, {
.eraseblocks = { {64 * 1024, 16} },
.block_erase = erase_block_jedec,
}, {
.eraseblocks = { {1024 * 1024, 1} },
.block_erase = NULL, /* AA 55 80 AA 55 10, only
in A/A mux mode */
}
},
.printlock = printlock_sst_fwhub,
.unlock = unlock_sst_fwhub,
.write = write_jedec_1,
.read = read_memmapped,
.voltages = { 30, 36 },
.formfactors = TSOP32|TSOP40|PLCC32,
},
Regards,
Carl-Daniel
--
http://www.hailfinger.org/
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