Texas Instruments TUSB1142, Руководство пользователя, Страница: 6 / 11

2.5 Local I2C Access
Access to TUSB1142’s local I2C signals is provided through the JMP4 and JMP5 connectors. The TUSB1142
supports either 1.8 V and 3.3 V LVCMOS levels. The TUSB1142 VIO_SEL pin (JMP13) is used to select which
voltage level is used. It is important that the I2C signalling levels meet the TUSB1142 LVCMOS levels when I2C
interface is accessed through the connector.
When the MODE pin (JMP12) is floating, TUSB1142 will be enabled for I2C mode. The TUSB1142 I2C target
address is determined by sampled state of SSEQ0/A0 (JMP7) and SSEQ1/A1 (JMP6).
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. TUSB1142 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 TUSB1142 EVM User's Guide SLLU350 – APRIL 2022
Submit Document Feedback
Copyright © 2022 Texas Instruments Incorporated