SCAU057 April 2022 TUSB1104
Access to TUSB1104’s local I2C signals is provided via the JMP3 and JMP4 connectors. The TUSB1104 supports either 1.8 V and 3.3 V LVCMOS levels. The TUSB1104 VIO_SEL pin (JMP12) is used to select which voltage level is used. It is important that the I2C signalling levels meet the TUSB1104 LVCMOS levels when I2C interface is accessed through the connector.
When the MODE pin (JMP13) is floating, TUSB1104 will be enabled for I2C mode. The TUSB1104 I2C target address is determined by sampled state of SSEQ0/A0 (JMP6) and SSEQ1/A1 (JMP5).
A standalone external I2C host can be connected for debug and control purposes. An example of an external I2C Host controller is the Total Phase Aardvark I2C/SPI Host Adapter (Total Phase Part#: TP240141).
| SSEQ1/A1 PIN LEVEL |
SSEQ0/A0 PIN LEVEL |
7-bit Address | Bit 7 (MSB) | Bit 6 | Bit 5 | Bit 4 | Bit 3 | Bit 2 | Bit 1 | Bit 0 (W/R) |
|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 44h | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0/1 |
| 0 | R | 45h | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 0/1 |
| 0 | F | 46h | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 0/1 |
| 0 | 1 | 47h | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 0/1 |
| R | 0 | 20h | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0/1 |
| R | R | 21h | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0/1 |
| R | F | 22h | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 0/1 |
| R | 1 | 23h | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 0/1 |
| F | 0 | 10h | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0/1 |
| F | R | 11h | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0/1 |
| F | F | 12h | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0/1 |
| F | 1 | 13h | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0/1 |
| 1 | 0 | Ch | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0/1 |
| 1 | R | Dh | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 0/1 |
| 1 | F | Eh | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 0/1 |
| 1 | 1 | Fh | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 0/1 |