Difference between revisions of "I2C-RPT"

Revision as of 23:25, 31 March 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 36: / Line 36: @@
 === Test Station Hardware ===
+* [[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)
-* [[Arduino Based Test Station]]
-* Connects directly to I2C port (J7) on the [[BLACK-PILL-HUB]]
 ** I2C address offset = 0x0
-** Built in I2C mux on [[BLACK-PILL-HUB]] is set to offset=0x1 so it does not conflict
+** UUT J5 connects directly to I2C port (J7) on the [[BLACK-PILL-HUB]]
-** Uses 4x of [[I2CIO-8]] cards
+** Install H1-H4 shunts
+*** Powers [[I2CIO-8]] cards from UUT
 [[File:I2C_RPT_Test_I6075_720px.jpg]]