(15-11-2021, 00:56)manyizoli Wrote: Today, I tested my RT809H, and 4GB emmc read 94 sec 8bit, and write 148 sec 8 bit, if I remember correctly
If I have time do screen shoot. Black UFPI do same time?
Thanks for reply.
I also found such a description
https://eletronicabr.com/forums/topic/23...o-de-emmc/
With eMMC in 8-bit mode all programmers (with HS USB2.0) will be limited with the same maximum speed ~37 MiB/sec. This is USB2 speed limit (+- 2MiB/sec, depends on PC). KiB it's 1024 bytes, MiB it's 1024 KiB.
If you are looking for faster speed's - turn on Async IO, and "One request" in Read mode menu and faster clock. And you can get good result in 4-bit mode, example:
Show Contentfast read in 4-bit mode:
UFPI socket type MMC, max. bus 8-Bit
eMMC ID 150100303030303030032011122800CD, DAT0-DAT7
eMMC Info Samsung '000000', size 3.64 GiB, SN 20111228, Unk 2013
eMMC Mode 4-Bit, Transfer state, TI 1, Drv 0, Clock 90MHz
eMMC detailed information:
OCR 0xC0FF8080 (3V3/1V8)
CID 150100303030303030032011122800CD (Samsung 000000, SN 0x20111228 (537989672), Unk 2013)
CSD D02701320F5903FFF6DBFFE78A404057
Device Revision [192] 0x05 (MMC v4.41)
Device Type [196] 0x07 (SDR HS52)
Command Classes 0xF5 (Class 0, 2, 4, 5, 6, 7)
Transfer Speed 0x32 (26MHz)
Reset Function [162] 0x00 (Temporarily disabled (default))
Boot Config [179] 0x00 (No Boot, access to USER)
Boot Bus [177] 0x00 (1-Bit SDR, Reset to 1-Bit)
Partitioning support [160] 0x03 (Yes, ENH)
Partitioning completed [155] 0x00 (NO)
USER Partition, size 0x00E9000000 (3.64 GiB)
BOOT1 Partition, size 0x0000100000 (1 MiB)
BOOT2 Partition, size 0x0000100000 (1 MiB)
RPMB Partition, size 0x0000020000 (128 KiB) OFF
eMMC Bus width 4-Bit
eMMC Bus config...OK
eMMC Clock settings User (90MHz)
eMMC Clock change OK
Data saving to File 'C:\UFPI\Dumps\SDMMC\flash_out.bin'...OK
User task flags Async IO CRC32
eMMC Read Mode 'Multiple Blocks (One request)'
Reading eMMC USER from 0x00000000, size 0xE9000000...OK
Checksum CRC32 0x946AD44E
Completed in 1 min. 46 sec. Code download speed 35.13 MiB/sec.
p.s. Also funny what RT809 now have Sync/Async mode-)))
