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Merge pull request #56 from vDorst/doc_SWTG024AS_update

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Doc swtg024 as update
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logicog
2025-12-27 19:25:43 +01:00
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doc/devices/SWTG024AS.md
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@@ -8,37 +8,55 @@ Also the RJ45 connectors can be all plastic/non-shielded or with metal shielding
## Brands
|Brand|Type|Managed|PCB|PCB Label|Flash|Chip RTL|
|---|---|---|---|---|---|---|
| LIANGUO |SWTG024AS |No| SWTG024AS-v2.0 | CM-23-11-2336 023-17453| 512kB| 8272 |
| LIANGUO |SWTG024AS |No| SWTG024AS-v2.0-17452 | CM-23-11-2336 023-17453| 512 KiB | 8272 |
| Haraco |ZX-SWTG124AS | Yes | SWTG024AS-v2.0 | ??? | ??? | 8272 |
| Xikestore |SKS3200M-4GPY2XF | Yes | SWTG024AS-v1.0 | CM-23-08-2043 023-16721 | ??? | 8272 |
| Sodola | SL-SWTG124AS-D | Yes | SWTG024AS-v2.0-17452 | ??? | 2048 KiB | 8272 |
## PCB
<img src="photos/SWTG024AS-v2.0-unmanaged/SWTG024AS-v2.0-top-uman.png" width="300" />
# SWTG024AS-v2.0 managed vs unmanged
Changes I found with my board vs [Managed version](https://github.com/up-n-atom/SWTG118AS/tree/main/photos/SWGT024AS-v2.0) of the PCB.
### Bottom
* R105: Installed, goes to R10-PullDown SFP2 -> TX DISABLE
* R105: Installed, goes to R10-PullDown SFP2 (J2) -> TX-DISABLE
* R85: Not Installed (Connected to K1 Reset Button)
* R90: Not installed (System Led)
* LED3: Not installed (System Led)
### Top
* K1: Not installed (Reset Button)
* R95: Installed (SFP2 signal RX-LOS), means that the managed-version can´t use the RX-LOS function.
* R270: Installed (SFP1 signal RX-LOS), same here as above.
* R268: Installed (SFP2 signal TX_DISABLE, but R262 200R pull-down is to high to drive by the SOC, needs mod!)
* U5: Flash is only 512kB instead of 2/4 MBit.
* R95: Installed (SFP2 (J2) signal RX-LOS), means that the managed-version can´t use the RX-LOS function.
* R270: Installed (SFP1 (J4) signal RX-LOS), same here as above.
* R268: Installed (SFP2 (J2) signal TX-DISABLE, but R262 200R pull-down is to high to drive by the SOC, needs mod!)
* U5: Flash is only 512 KiB instead of 2/4 MiB.
### Notes
* `TX Disable`-SFP2 and Button `K1` share the same GPIO pin via `R105` and `R85`.
But via `R88`, `TX Disable`-SFP2 can be mapped to `GPIO36`.
* `TX Disable` pull-down resistos on both SFP are to low to drive by the SOC.
* `TX-Disable`-SFP2 and Button `K1` share the same GPIO pin via `R105` and `R85`.
But via `R88`, `TX-Disable`-SFP2 can be mapped to `GPIO36`.
* `TX-Disable` pull-down resistos on both SFP are to low to drive by the SOC.
We need to make a `Best`-BOM variant so we can use all the featues.
# Connectors
## Port overview
```
┌────────────────────────────────────────────────────────────────────────────────────────┐
│ ┌──────────┐ ┌──────────┐ │
│ ┌─────────┐ ┌─────────┐ ┌─────────┐ ┌─────────┐ │ SFP (J4) │ │ SFP (J2) │ │
│ │ RJ45 │ │ RJ45 │ │ RJ45 │ │ RJ45 │ │ PORT 5 │ │ PORT 6 │ │
│ │ PORT 1 │ │ PORT 2 │ │ PORT 3 │ │ PORT 4 │ │ MAC 8 │ │ MAC 3 │ │
│ O │ MAC 4 │ │ MAC 5 │ │ MAC 6 │ │ MAC 7 │ │ SerDes 1 │ │ SerDes 0 │ │
│ RST └─────────┘ └─────────┘ └─────────┘ └─────────┘ └──────────┘ └──────────┘ │
└────────────────────────────────────────────────────────────────────────────────────────┘
```
## J4
* Location: Left SFP connector `J4`.
* Connected to: 10GMAC number 8, second SDS.
* Connected to: 10GMAC number 8, second SerDes.
|`J4` SFP1 PINs | Signal | Component | GPIO | Notes |
|---|---|---|---|---|
@@ -54,7 +72,7 @@ Changes I found with my board vs [Managed version](https://github.com/up-n-atom/
## J2
* Location: Right SFP connector `J2`.
* Connected to: 10GMAC number 3, first SDS.
* Connected to: 10GMAC number 3, first SerDes.
|`J2` SFP2 PINs | Signal | Component | GPIO | Notes |
|---|---|---|---|---|
@@ -73,19 +91,27 @@ Note: component numbering `<L>-<REFDES>-<SIDE>`
* SIDE: Side of the component. when the rj45 are facing towards you are you can read the silkscreen normal.
L = Left, R=right, B=bottom, T=top or P with a pin number.
### T3
This connector seems to go to U4 and U10.
I thing is used to connect a external CPU to controlle the SOC.
Even to program the flash via the SOC.
### T3, Slave Interface
This connector goes to U4 `I2C EEPROM` and U10 `SPI FLASH`.
Signals are based on that `U4` is likely a I2C-EEPROM, `U10` is likely other SPI-chip.
|`T3` pin|what|Signal|
|---|---|---|
|1| U4-P6, 33R U10-P6 | I2C-SCL, SPI-CLK |
|1| U4-P6, 33R U10-P6 | I2C-SCL, SPI-CLK, Slave SCK/SCL/MDC/EE_SCL |
|2| GND | --- |
|3| U4-P5, U10-P5 | I2C-SDA, SPI-DI/DO |
|3| U4-P5, U10-P5 | I2C-SDA, SPI-DI/DO, Slave SDI/SDA/MDIO/EE_SDA |
|4| VCC |
|5| 33R -> U10-P2 | SPI-DO/D1 |
|6| U10-P1 | SPI-CS |
Note: 1 pin is square shaped.
The Slave Interface allows an extenal host to controll the SOC even if the internal MCU is used.
Depending on the `IF_SEL` bootstrap resistors, this can me `I2C`, `SPI` or `SMI`.
On this device it is `I2C` on address `0b1011100` or `0x5c` (7-bit notation).
* I2c Read: must be a write_read opperation `<Dev-ADDR><RegAddr15:8><RegAddr7:0>` `<DevAddr><Data7:0><Data15:8><Data23:16><Data31:24>`.
* I2c Write: `<Dev-ADDR><RegAddr15:8><RegAddr7:0><DevAddr><Data7:0><Data15:8><Data23:16><Data31:24>`.
Example register `0x0004` return chip id `0x00, 0x00, 0x72, 0x83` = `0x83720000`.
### T5, serial console
|`T5` pin|GPIO|Signal|
@@ -94,6 +120,7 @@ Signals are based on that `U4` is likely a I2C-EEPROM, `U10` is likely other SPI
| 2 | GND | |
| 3 | GPIO32 | U0RXD (Input) |
| 4 | 3V3 | |
Note: 1 pin is square shaped.
### T8
|`T8` pin|what|Signal|
@@ -104,6 +131,7 @@ Signals are based on that `U4` is likely a I2C-EEPROM, `U10` is likely other SPI
| 4 | 3V3 | |
| 5 | GPIO47 | |
| 6 | GPIO49 | |
Note: 1 pin is square shaped.
# Reset ciruit
| Cmp | Function |
@@ -121,9 +149,9 @@ Reset-line found at `T-D3-D` active-low.
| 00000002 | GPIO01 | T-C152-T |? | | GPIO33 | | |
| 00000004 | GPIO02 | T-C153-T |? | | GPIO34 | | |
| 00000008 | GPIO03 | T-R33-T |? | | GPIO35 | | |
| 00000010 | GPIO04 | B-C155 |? | | GPIO36 | T-R88-L, T-R84-B | Optional SFP-TX-DIS[^2], Reset |
| 00000010 | GPIO04 | B-C155 |? | | GPIO36 | T-R88-L, T-R84-B | Optional SFP2 TX-DISABLE[^2], Reset |
| 00000020 | GPIO05 | B-C156 |? | | GPIO37 | SFP1-8, T-R270 | SFP-LOS |
| 00000040 | GPIO06 | T-C157-T |? | | GPIO38 | SFP1-3, T-R268 | SFP-TX-DIS[^2] |
| 00000040 | GPIO06 | T-C157-T |? | | GPIO38 | SFP1-3, T-R268 | SFP1 TX-DISABLE[^2] |
| 00000080 | GPIO07 | T-C158-T, R165 |? | | GPIO39 | SFP1-4, T-R266 | I2C-SDA4 |
| 00000100 | GPIO08 | | | | GPIO40 | SFP2-5, T-R87; SFP1-5, T-R267; | I2C-SCL |
| 00000200 | GPIO09 | SFP2-LED, T-R36-T |LED-SFP2 | | GPIO41 | SFP2-4, T-R85 | I2C-SDA |
@@ -139,7 +167,7 @@ Reset-line found at `T-D3-D` active-low.
| 00080000 | GPIO19 | PORT3-LED-GREEN |LEDx[^1] | | GPIO51 | SFP2-8, T-R95 | SFP-LOS |
| 00100000 | GPIO20 | PORT3-LED-YELLOW |LEDx | | GPIO52 | | |
| 00200000 | GPIO21 | |LEDx[^1] | | GPIO53 | | |
| 00400000 | GPIO22 | PORT4-LED-GREEN |LEDx[^1] | | GPIO54 | SFP2-3, T-R105-L | SFP-TX-DIS[^2] or via T-R85 to RESET[^3], T-R84-T |
| 00400000 | GPIO22 | PORT4-LED-GREEN |LEDx[^1] | | GPIO54 | SFP2-3, T-R105-L | SFP2 TX-DISABLE[^2] or via T-R85 to RESET[^3], T-R84-T |
| 00800000 | GPIO23 | PORT4-LED-YELLOW |LEDx | | GPIO55 | T-R78-B | |
| 01000000 | GPIO24 | SFP1-LED-J4, T-R35 |LED-SFP1 | | GPIO56 | | |
| 02000000 | GPIO25 | | | | GPIO57 | | |
@@ -181,5 +209,5 @@ So higher power SFP-modules should work.
[^1]: LEDs are found by just plugin a RJ45 connector and see with cmd `gpio` the status change. But the bit pattern for port 1,2 are diffrent from port 3,4.
[^2]: Only on the unmanaged verions are `R10` and `R268` placed. But the very low pull-down resistor `R10` & `R262` prevent to SOC to drive does pins. A mod is needed.
[^2]: Only on the unmanaged verions are `R10` and `R268` placed. But the very low pull-down resistor `R10` and `R262` prevent to SOC to drive does pins. A mod is needed.
[^3]: GPIO54 is used for the reset-button. `T-R85` is placed.