Hardware » History » Revision 15
Revision 14 (laforge, 05/03/2017 07:03 AM) → Revision 15/22 (laforge, 05/03/2017 09:32 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 (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
