Nsa310 pcb

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Contents

[edit] Connectors

[edit] J1 JTAG

Pin Function Notes
1 VCC (3V3)
2 VCC (3V3) shorted to Pin 1
3 nTRST
4 GND
5 TDI
6 GND
7 TMS
8 GND
9 TCK
10 GND
11 RTCK shorted to Pin 9
12 GND
13 TDO
14 GND
15 Reset connected to SW1 + R140
16 GND
17  ?
18 GND
19  ?
20 GND

[edit] J2 UART

Pin Function Notes
1 VCC (3V3)
2 TX (3V3)
3 RX (3V3)
4 NC
5 GND

[edit] J3 Unknown

Pin Function Notes
1  ? Connected through 100R to VCC (3V3)
2  ? Connected through 4K6 to GND


[edit] Components [assembled]

[edit] U1 SOC

Chip: 88F6281
Description: Main SOC
Notes:

[edit] U2 NAND

Chip: K9F1G08UOD
Description: Nand Flash, 1Gbit, 8Bit
Notes: 128MB, 8 bit

[edit] U10 Ethernet

Chip: rtl8111c
Description: Realtek PCIe Gigabit Ethernet controller
Notes:

[edit] U11 USB HUB

Chip: GL850G
Description: 4 Port usb Hub
Notes: There are probably two unused USB ports

[edit] U12 Monitor

Chip: ADT7476
Description: Remote Thermal Controller and Voltage Monitor
Notes:

[edit] Components [not assembled]

[edit] U3 ? ?

This position is not assembled.
Notes:

  • I think this might be spi flash position
    • because is near by Nand flash
    • and there isn't any i2c interface
    • and is it marked as U3 (nand flash is marked U2)
  • There should be at least one GPIO connected to main SOC, for CS signal.
  • There should be SCLK, MISO, MOSI signals
  • There should be at least one GND, and VCC (this should be battery powered as well)
  • There should be some RST, RDY/BUSY pin
Pin Function Notes
1  ?
2  ?
3  ?
4  ?
5  ?
6  ?
7  ?
8  ?

[edit] U7 I2C RTC

This position is not assembled.
Notes:

  • There should be at least one GPIO connected to main SOC,
  • There should be two OSC inputs,
  • There should be at least one GND, and VCC (this should be battery powered as well)
  • There should be some controlling interface i2c, spi, ...
Pin Function Notes
1  ?
2 OSC Connected through R146 (100R) to 32kHz
3  ?
4 GND
5 I2C SDA
6 I2C SCL
7  ?
8 VCC Battery power supply: assemble R136 (0R) + D3

Regular (standby) power supply 3V3: assemble D1

[edit] U29 I2C ?

This position is not assembled.
Notes:

  • There is some controlling interface
Pin Function Notes
1  ?
7 I2C SCL
8 I2C SDA
16  ?

[edit] PCB

Zyxel NSA-310 Front view
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Zyxel NSA-310 Back view
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„Čas si vymysleli lidé, aby věděli, od kdy do kdy a co za to.“ Jan Werich