Hardware » History » Version 5
laforge, 05/02/2017 09:13 PM
| 1 | 1 | laforge | h1. Hardware |
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| 2 | |||
| 3 | 3 | laforge | h2. Physical Setup / Board Stacking |
| 4 | 2 | laforge | |
| 5 | 1 | laforge | The hardware consists of two circuit boards: |
| 6 | |||
| 7 | * Top board: AC/DC power supply and Ethernet switch |
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| 8 | * Bottom board: Actual Femtocell mainboard |
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| 9 | |||
| 10 | The two boards are sandwiched together by the following connections: |
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| 11 | * 6-pin fine-pitch connector (most likely for DC power) |
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| 12 | * flexible printed circuit cable (most likely for Ethernet MII/RMII) |
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| 13 | * two large sheet metal parts for ground and/or thermal connection |
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| 14 | |||
| 15 | It is thus not very straight forward to operate the opened device in a safe way (i.e. without live AC line voltage present). |
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| 16 | |||
| 17 | We will be working on a way to operate it with injected safe low DC voltage, but that is still TBD. |
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| 18 | 4 | laforge | |
| 19 | h2. Major Components |
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| 20 | |||
| 21 | h3. Femtocell SoC |
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| 22 | |||
| 23 | Broadcomm BCM61610KFB1G (formerly Percello) |
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| 24 | * no information found anywhere |
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| 25 | |||
| 26 | h3. NAND Flash |
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| 27 | |||
| 28 | Hynix H27U1G8F2BTR |
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| 29 | * 1Gbit (128MByte) NAND Flash, x8 data bus, 3.3V, 2k page size, 128k erase block, 48pin TSOP1 |
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| 30 | * http://natisbad.org/NAS/refs/Hynix_NAND_128Mo_H27U1G8F2BT.pdf |
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| 31 | |||
| 32 | 5 | laforge | h3. RF Transceiver |
| 33 | 4 | laforge | |
| 34 | Maxim MAX2550 |
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| 35 | * Band I, V, and VIII WCDMA Femtocell Transceiver with GSM Monitoring |
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| 36 | * https://www.maximintegrated.com/en/products/comms/wireless-rf/MAX2550.html |
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| 37 | * https://datasheets.maximintegrated.com/en/ds/MAX2550.pdf |
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| 38 | 1 | laforge | * https://www.maximintegrated.com/en/app-notes/index.mvp/id/5364 |
| 39 | 5 | laforge | |
| 40 | h3. Ethernet Switch |
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| 41 | |||
| 42 | |||
| 43 | h2. Connectors |
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| 44 | |||
| 45 | h3. Mainboard J2 |
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| 46 | |||
| 47 | * 12pos 2x6 1.27mm pitch header |
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| 48 | * unpopulated |
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| 49 | * likely JTAG and/or console |
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| 50 | |||
| 51 | h3. Mainboard J4 |
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| 52 | |||
| 53 | * 3pos 2.54mm pitch hader, center pos missing |
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| 54 | * used to supply 230V AC from mainboard to PSU board |
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| 55 | * connects to PSU Board J4 |
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| 56 | |||
| 57 | h3. Mainboard J5 |
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| 58 | |||
| 59 | * 8pos 2x4 1.27mm pitch SMD header |
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| 60 | * likely DC power |
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| 61 | * connects to PSU-Board J |
