Hardware » History » Revision 6
Revision 5 (laforge, 05/02/2017 09:13 PM) → Revision 6/22 (laforge, 05/02/2017 09:19 PM)
h1. Hardware h2. Physical Setup / Board Stacking The hardware consists of two circuit boards: * Top board: AC/DC power supply and Ethernet switch * Bottom board: Actual Femtocell mainboard The two boards are sandwiched together by the following connections: * 6-pin fine-pitch connector (most likely for DC power) * flexible printed circuit cable (most likely for Ethernet MII/RMII) * two large sheet metal parts for ground and/or thermal connection It is thus not very straight forward to operate the opened device in a safe way (i.e. without live AC line voltage present). We will be working on a way to operate it with injected safe low DC voltage, but that is still TBD. h2. Major Components h3. Femtocell SoC Broadcomm BCM61610KFB1G (formerly Percello) * no information found anywhere h3. NAND Flash Hynix H27U1G8F2BTR * 1Gbit (128MByte) NAND Flash, x8 data bus, 3.3V, 2k page size, 128k erase block, 48pin TSOP1 * http://natisbad.org/NAS/refs/Hynix_NAND_128Mo_H27U1G8F2BT.pdf h3. RF Transceiver Maxim MAX2550 * Band I, V, and VIII WCDMA Femtocell Transceiver with GSM Monitoring * https://www.maximintegrated.com/en/products/comms/wireless-rf/MAX2550.html * https://datasheets.maximintegrated.com/en/ds/MAX2550.pdf * https://www.maximintegrated.com/en/app-notes/index.mvp/id/5364 h3. Ethernet Switch h2. Connectors h3. Mainboard J2 * 12pos 2x6 1.27mm pitch header * unpopulated * likely JTAG and/or console h3. Mainboard J3 * 30pos 0.5mm pitch FPC * connects to PSU Board CON1 * likely LED + Ethernet h3. Mainboard J4 * 3pos 2.54mm pitch hader, center pos missing * used to supply 230V AC from mainboard to PSU board * connects to PSU Board J4 h3. Mainboard J5 * 8pos 2x4 1.27mm pitch SMD header * likely DC power * connects to PSU-Board J