Difference between revisions of "I2C-RPT"

Revision as of 00:46, 1 April 2022

I2C Hub / Repeater / Replicator / Multiplexer / De-multiplexer
Four I2C Ports
Host port Controlled via I2C
PCA9544A IC Multiple vendors
3.3V or 5V host operation
3.3V or 5V slave ports operation
Voltage translation between the ports
Example: A Raspberry PI which runs 3.3V can control an I2C device which runs at 5V
Interrupt line on each channel and host
100KHz/400KHz operation
On-board termination resistors
49x49mm form factor
4 solid 4-40 mounting holes
Arduino driver and example code
Raspberry Pi example code

Arduino Based Test Station
- Built in I2C mux on BLACK-PILL-HUB is set to offset=0x1 so it does not conflict
Uses 4x of I2CIO-8 cards
Unit Under Test (UUT)
- I2C address offset = 0x0
- UUT J5 connects directly to I2C port (J7) on the BLACK-PILL-HUB
- Install H1-H4 shunts
  - Powers I2CIO-8 cards from UUT

@@ Line 22: / Line 22: @@
 * Arduino driver and example code
 * Raspberry Pi example code
+== Connectors ==
+=== J1-J4 - I2C Slave ports ====
+# GND
+# VCC
+# SDA
+# SCL
+# INT*
+=== J5 - I2C Host port ====
+# GND (G)
+# VCC (V)
+# SDA (D)
+# SCL (C)
+# INT* (I)
 == Drivers/Example Code ==