Differences

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--- usw-lite-16-poe [2022/03/14 21:25] – More LM75 details svanheule
+++ usw-lite-16-poe [2023/01/30 15:28] (current) – Add missing digit svanheule
@@ Line 15: / Line 15: @@
     * 1× Broadcom BCM59121 PSE controller
   * Extra I/O
-    * 2× NXP PCA9555A: 16-bit I2C GPIO expander (U11 and U111)
+    * 2× NXP PCA9555A: 16-bit I2C GPIO expander
     * 5× 74VHC595: 8-bit latching shift register with 3-state output enable (U112, U114, U117, U118, U119)
-  * Power supply: 100V-240V AC with C13 plug, internal PSU provides power for PoE and switch functions. Low voltage power is managed by an internal TPS23754 802.at PD controller.
+  * Power supply: 100V-240V AC with C13 plug, internal PSU provides power for PoE and switch functions. Low voltage power is managed by an internal TPS23754 802.3at PD controller.
 ====== Board configuration ======
   * SoC
+    * gpio 0: reset button
+    * gpio 1: /INT of PCA9555 @ 25, falling edge/active low
     * gpio 2: I2C-0 SCL (bit banged)
     * gpio 3: I2C-0 SDA (bit banged)
-    * gpio 12: I2C-1 SCL (bit banged)
+    * gpio 12: I2C-1 SCL (bit banged). Defined in OEM, but not used.
-    * gpio 13: I2C-1 SDA (bit banged)
+    * gpio 13: I2C-1 SDA (bit banged). Defined in OEM, but not used.
   * I2C-0: 5 devices reported by ''i2cdetect''
     * PoE MCU @ 0x20 (U49)
-    * PCA9555A @ 0x22 (U469)
+    * PCA9555A @ 0x22 (U11)
-    * PCA9555A @ 0x25 (U11)
+      * /INT: cascaded into U469:P1_7 (gpio 15 on PCA9555A @ 25)
-      * gpio 0: white LED, active high
+      * gpio 0: port 2 amber PoE status LED
-      * gpio 1: blue LED, active high
+      * gpio 1: port 1 amber PoE status LED
-      * gpio 2: PoE output enable, active high
+      * gpio 2: port 4 amber PoE status LED
-    * LM75 compatible @ 0x48 (U152): SoC temperature
+      * gpio 3: port 3 amber PoE status LED
-    * LM75 compatible @ 0x49 (U153): phy temperature
+      * gpio 4: port 6 amber PoE status LED
+      * gpio 5: port 5 amber PoE status LED
+      * gpio 6: port 8 amber PoE status LED
+      * gpio 7: port 7 amber PoE status LED
+    * PCA9555A @ 0x25 (U469)
+      * /INT: cascaded into SoC gpio 1
+      * gpio 8: white LED, active high
+      * gpio 9: blue LED, active high
+      * gpio 10: PoE output enable, active high
+      * gpio 15: /INT of PCA9555A @ 22, active low (interrupt on falling edge)
+    * NCT375 (LM75A compatible) @ 0x48 (U152): SoC temperature
+    * NCT375 (LM75A compatible) @ 0x49 (U153): phy temperature
   * I2C-1: no devices reported by ''i2cdetect''