Xeltek: Difference between revisions
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The 5000E is internally composed of an 8 board stack. From top to bottom, the boards are: | The 5000E is internally composed of an 8 board stack. From top to bottom, the boards are: | ||
* GND DRV | |||
* V3 DRV | |||
* V3 (P1-72) DRV | |||
* V1 DRV | |||
* V2 DRV | |||
* IO BOARD | |||
* MCU BOARD | |||
* POWER BOARD | |||
=== Voltage Pin Driver Boards === | === Voltage Pin Driver Boards === | ||
Revision as of 06:57, 18 May 2018
Superpro and such
5000E
Hardware
The 5000E is internally composed of an 8 board stack. From top to bottom, the boards are:
- GND DRV
- V3 DRV
- V3 (P1-72) DRV
- V1 DRV
- V2 DRV
- IO BOARD
- MCU BOARD
- POWER BOARD
Voltage Pin Driver Boards
The V1/V2/V3* and GND drive boards share a similar topology. A set of shift registers is used to configure a transistor high or low-side drive. The GND board has two additional relays on pins, possibly for support of some high current device. The V1, V2 and V3 boards use a 74HC4094 shift reg, a ULN2003 transistor array and a high-side transistor to switch the voltage. The V2 and V3 boards incorporate a diode to prevent reverse biasing of the transistor which suggests the V1 voltage is the highest voltage used.
IO Board
The IO board is just a Spartan XC2S50E FPGA connected to each IO line through a 220 ohm resistor and a diode voltage clamp. Whether the I/O voltage tracks one of the supplies (V3?) is unknown.
MCU Board
Components:
- AT91R40008 Processor (ARM7, no rom, very few peripherals, external bus interface)
- TLC7226 Quad DAC
- EN29LV040A Flash (512kB)
- "Xeltek AE81" (Almost certainly an OTP FPGA)
- USB Device controller (part # unreadable in photos)
Power Board
- 3x LM317 + 3x MC34063 switchers
- Topology not yet reversed
- Misc op amps
Software
A basic bootloader / USB loader is resident in the on-board flash. The Host software communicates with this USB loader and downloads the actual programming routines into SRAM.