JMicron JMF667H Reference Designs (cont.)
Now let's take a look at the JMF667H paired with Toshiba A19 single plane NAND.
JMicron JMF667H with Toshiba A19 128GB
Armed with eight Toshiba 19nm A19 NAND packages, the first Toshiba based drive is 128GB.
The firmware on this model is SVN418a.
The same ESMT DDR3 SDRAM found on the L85C 128GB drive is also used on the Toshiba 128GB flash model.
Sixteen Toshiba TC58TEG6DDKTA00 19nm A19 flash packages in total are used.
There are eight packages on each side.
JMicron JMF667H with Toshiba A19 240GB
The final drive in our roundup uses the JMF667H controller with Toshiba's A19 flash. There are eight flash packages with four times the density as the 128GB model above. This model also has more overprovisioning than the three other drives we're looking at today: 240GB is user available with 256GB total.
The firmware for this model appears to be a bit newer: SVN423a. Oddly enough, this is the only model we had any issues with during testing.
The SDRAM package is from Nanya, and it is 128MB.
The flash is Toshiba TH58TEG8DDKTA20.
The PCB has pads on the back for additional flash, but this model only uses eight packages on the top side.
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