====== Zyxel GS1900-24E ======

{{ https://www.zyxel.com/library/assets/products/gs1900-series/img_gs1900-24e_p_1000.jpg?200}}

The GS1900-24E is a 24-port Gigabit L2 switch.

===== Hardware ===== 
  * [[rtl838x|RTL8382M]]
  * 2 * [[RTL8218B]] 8-port PHY extenders
  * [[RTL8231]] GPIO extender to control the port LEDs
  * Nanya NT5TU128M8GE-ACI (128MB SDRAM)
  * Macronix MX25L12835F (16MB flash)

==== Pinouts ====

 Header JP2 has a UART:
  * JP2.1: 3.3V
  * JP2.2: TX
  * JP2.3: RX
  * JP2.4: GND

Pin 1 is identified with a white dot and is closest to rear of the switch. 

==== Board details ====
{{wiki:gs1900-24e-pcb-top.png?400}}

===== Firmware =====

==== Vendor board definition ====
<file>
------------------ Board Configuration ------------------

****************************
 GS1900-24E
****************************
============================
 Board GPIO
============================
Device  Pin  Direction  Default  Current
------- ---- ---------- -------- --------
INT     0    OUT        0        0       
INT     1    OUT        1        1       
INT     2    OUT        0        0       
INT     3    OUT        0        0       
INT     8    OUT        1        1       
INT     9    OUT        1        1       
INT     12   IN         0        0       
INT     13   OUT        1        1       
INT     14   OUT        1        1       
INT     15   OUT        1        1       
INT     16   IN         0        0       
INT     17   OUT        1        1       
INT     18   OUT        0        0       
INT     19   IN         0        0       
INT     20   OUT        1        1       
INT     21   IN         0        0       
INT     22   IN         0        0       
INT     23   OUT        1        1       
EXT     0    IN  (IN  ) 0        1       
EXT     1    IN  (IN  ) 0        1       
EXT     2    IN  (IN  ) 0        0       
EXT     3    IN  (IN  ) 0        1       
EXT     4    IN  (IN  ) 0        0       
EXT     5    OUT (OUT ) 1        1       
EXT     6    OUT (OUT ) 1        1       
EXT     7    IN  (IN  ) 0        1       
EXT     8    OUT (OUT ) 1        1       
EXT     13   OUT (OUT ) 0        0       
EXT     14   OUT (OUT ) 0        0       
EXT     15   OUT (OUT ) 0        0       
EXT     16   OUT (OUT ) 0        0       
EXT     17   OUT (IN  ) 0        0       
EXT     18   OUT (IN  ) 0        0       
EXT     22   IN  (IN  ) 0        0       
EXT     23   OUT (OUT ) 0        0       
EXT     24   OUT (OUT ) 0        0       
EXT     25   OUT (OUT ) 0        0       
EXT     26   IN  (IN  ) 0        0       
EXT     27   IN  (IN  ) 0        0       
EXT     28   IN  (IN  ) 0        0       
EXT     29   OUT (OUT ) 0        0       
EXT     30   OUT (OUT ) 0        0       
EXT     31   OUT (OUT ) 0        0       
EXT     32   IN  (IN  ) 0        0       
EXT     33   IN  (IN  ) 0        0       
EXT     34   OUT (OUT ) 1        1       

============================
 Board Configuration
============================
====== Port ==================
Type       Usr  Phy     Media       Speed          Duplex   Attr
---------- ---- ------- ----------- -------------- -------- -------
1000M      1    (0) 1   Copper      (A) ALL        Auto     0      
1000M      2    (0) 0   Copper      (A) ALL        Auto     0      
1000M      3    (0) 3   Copper      (A) ALL        Auto     0      
1000M      4    (0) 2   Copper      (A) ALL        Auto     0      
1000M      5    (0) 5   Copper      (A) ALL        Auto     0      
1000M      6    (0) 4   Copper      (A) ALL        Auto     0      
1000M      7    (0) 7   Copper      (A) ALL        Auto     0      
1000M      8    (0) 6   Copper      (A) ALL        Auto     0      
1000M      9    (0) 9   Copper      (A) ALL        Auto     0      
1000M      10   (0) 8   Copper      (A) ALL        Auto     0      
1000M      11   (0) 11  Copper      (A) ALL        Auto     0      
1000M      12   (0) 10  Copper      (A) ALL        Auto     0      
1000M      13   (0) 13  Copper      (A) ALL        Auto     0      
1000M      14   (0) 12  Copper      (A) ALL        Auto     0      
1000M      15   (0) 15  Copper      (A) ALL        Auto     0      
1000M      16   (0) 14  Copper      (A) ALL        Auto     0      
1000M      17   (0) 17  Copper      (A) ALL        Auto     0      
1000M      18   (0) 16  Copper      (A) ALL        Auto     0      
1000M      19   (0) 19  Copper      (A) ALL        Auto     0      
1000M      20   (0) 18  Copper      (A) ALL        Auto     0      
1000M      21   (0) 21  Copper      (A) ALL        Auto     0      
1000M      22   (0) 20  Copper      (A) ALL        Auto     0      
1000M      23   (0) 23  Copper      (A) ALL        Auto     0      
1000M      24   (0) 22  Copper      (A) ALL        Auto     0      


====== Button ================

------------ Reset Button
GPIO: EXT_3 
Timer: 3(sec)  Action: Reboot
Timer: 6(sec)  Action: Restore Factory


====== Led ===================
SYS (REG)
ALARM (REG)


====== Reset =================
Type: GPIO
GPIO: EXT_5 


====== WatchDog ==============
Type: REG

</file>

===== References =====
  * [[https://www.zyxel.com/us/en/support/DownloadLandingSR.shtml?c=us&l=en&kbid=M-01602&md=GS1900-24E | Product page]]
  * [[https://download2.zyxel.com/GS1900-24E/datasheet/GS1900-24E_19.pdf | Datasheet]]