Texas Instruments TUSB1004EVM, User Manual

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2.5 Local I2C Access
Access to TUSB1004s local I2C signals is provided through the JMP1 and JMP2 connectors. The TUSB1004
supports either 1.8 V and 3.3 V LVCMOS levels. The TUSB1004 VIO_SEL pin (JMP9) is used to select which
voltage level is used. It is important that the I2C signalling levels meet the TUSB1004 LVCMOS levels when I2C
interface is accessed through the connector.
When the MODE pin (JMP10) is floating, TUSB1004 will be enabled for I2C mode. The TUSB1004 I2C target
address is determined by sampled state of SSEQ0/A0 (JMP3) and SSEQ1/A1 (JMP4).
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).
Table 2-5. TUSB1004 I
2
C Target Address
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
Hardware Configuration www.ti.com
6 TUSB1004EVM User's Guide SLLU351 – APRIL 2022
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