Hardware » History » Revision 16
Revision 15 (laforge, 05/03/2017 09:32 PM) → Revision 16/22 (laforge, 05/06/2017 03:21 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 (U3) Broadcomm BCM61610KFB1G (formerly Percello) * no information found anywhere * probably derivative of PRC6100 ** http://www.node-h.com/en/news/article/Node-H_3GPP_Iu-h_Femtocell_Software_is_Standards_Compliant.php ** https://www.s3group.com/semiconductor-solutions/s3-percello-collaborate-produce-latest-femtocell-baseband-processor/ * probably derivative of PRC6000 ** https://www.bdti.com/InsideDSP/2008/10/15/Percello * contains MIPS24Kc core h3. NAND Flash (U40) Hynix H27U1G8F2BTR * 1Gbit (256MByte) (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 Atheros AR8236-AL1A * 6-port Fast Ethernet Switch * https://wikidevi.com/files/Atheros/specsheets/AR8326.pdf * http://jhongtech.com/DOWN/ATHEROS--AR8236.pdf h3. AC/DC switching power supply controller * https://www.power.com/sites/default/files/product-docs/linkcv_family_datasheet.pdf h3. RF LDO (WU1) * AP2318 Adjustable ULDO in DFN3x3-8 ** https://www.diodes.com/assets/Datasheets/AP2318.pdf h2. Connectors h3. Mainboard J2 * 12pos 2x6 1.27mm pitch header * unpopulated * likely (MIPS) JTAG and/or console |_.Pin|_.Function| |1|GND| |2|3V3| |3|| |4|| |5|| |6|| |7|| |8|| |9|UART_TXD| |10|| |11|| |12|| h3. Mainboard J3 * 30pos 0.5mm pitch FPC * connects to PSU Board CON1 * likely LED + AR8236 (R)MII + AR8236 SPI + AR8236 UART 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 * DC power input * connects to PSU-Board J |_.Pin|_.Function| |1|4V DC (supply for LDOs on mainboard)| |2|4V DC (supply for LDOs on mainboard)| |3|GND| |4|GND| |5|GND| |6|GND| |7|3.3V DC (regulated on PSU board for Ethernet Switch)| |8|3.3V DC (regulated on PSU board for Ethernet Switch)| h3. PSU-Board U9 Yellow RJ45 mag-jack, connected to Port 0 of AR8236 h3. PSU-Board U8 Grey RJ45 mag-jack, connected to Port 3 of AR8236