Now let’s check out the device’s electronics. To reach its system card we unfastened four screws at the bottom of the case (you need a screwdriver with a star-shaped tip for that).
Next we removed the bottom part of the case, unfastened two more screws (with cross-shaped heads) and took the PCB out. The PCB occupies almost the entire case. We could see now that the card with the SATA ports was connected to the main PCB by means of a connector resembling a PCI Express x4 slot. The manufacture quality is high: the components are evenly distributed on the surface of the card. There are no stains or anything.
The main chip on the PCB is, of course, the MPC8313 SoC controller from Freescale which is based on the e300 core with Power architecture. Here are its specifications taken from the Freescale website:
e300c3, 2-IU, w/FPU, up to 333MHz
L1 I/D Cache (KB)
16 KI/16 KD
Local Bus Controller
25b/8b dedicated or 25b/16b max Add/Data,
1 32-bit up to 66 MHz wake-on-PME
2 10/100/1000 MACs, SGMII, 98145.452
1 high-speed USB 2.0 host/device + HS PHY,
None /SEC 2.2
Est. Core Power
Standby power <300 mW
Near the processor there are two consoles, one of which is not installed, and three seats for some jumpers.
The NS2300N comes with 128 megabytes of system memory, which is quite a lot for a home NAS. These are two 64MB DDR2 SDRAM chips from Promos (V59C1512164QAF37).
The NAS’s flash memory is based on Hynix’s HY27US08561A chip. The capacity of the chip is 32 megabytes which is quite a lot for a home NAS, too.
Of course, Promise packs its own RAID controller into all of its products. Here, the NS2300N comes with a dual-port PDC20771 controller, the same controller as you can see on the TX2300 PCI card.
The NAS’s Gigabit Ethernet interface is supported by the popular RTL8169SC chip from Realtek.
As for the USB interface, the Promise website says that the MPC8313 has certain limitations about the performance of the USB port (this must be the reason why the NS2300N has only one USB port). It is because of those limitations that the NAS uses a discrete physical-level USB controller (a USB3300 chip from SMSC) which is connected to the processor via a ULPI interface.
And finally, the indication and control system of the NS2300N is based on the GAL16V8D microcontroller from Lattice.