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AM263P4 数据表(PDF) 111 Page - Texas Instruments |
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AM263P4 数据表(HTML) 111 Page - Texas Instruments |
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111 / 168 page  6.11.5.7.1 I2C The device contains four multicontroller Inter-Integrated Circuit (I2C) controllers. Each I2C controller was designed to be compliant to the Philips I2C-bus™ specification version 2.1. However, the device IOs are not fully compliant to the I2C electrical specification. The speeds supported and exceptions are described per port below: • I2C1, I2C2, and I2C3 – Speeds: • Standard-mode (up to 100Kbits/s) – 3.3V • Fast-mode (up to 400Kbits/s) – 3.3V – Exceptions: • The IOs associated with these ports are not compliant to the fall time requirements defined in the I2C specification because the IOs are implemented with higher performance LVCMOS push-pull IOs that were designed to support other signal functions that could not be implemented with I2C compatible IOs. The LVCMOS IOs being used on these ports are connected so they emulate open-drain outputs. This emulation is achieved by forcing a constant low output and disabling the output buffer to enter the Hi-Z state. • The I2C specification defines a maximum input voltage VIH of (VDD max + 0.5V), which exceeds the absolute maximum ratings for the device IOs. The system must be designed to provide the I2C signals never exceed the limits defined in the Absolute Maximum Ratings section of this data sheet. • I2C0 – Speeds: • Standard-mode (up to 100Kbits/s) – 3.3V • Fast-mode (up to 400Kbits/s) – 3.3V – Exceptions: • The IOs associated with this port were not design to support Hs-mode. • The rise and fall times of the I2C signals connected to these ports must not exceed a slew rate of 0.8V/ns (or 8E+7V/s). This limit is more restrictive than the minimum fall time limits defined in the I2C specification. Therefore, it may be necessary to add additional capacitance to the I2C signals to slow the rise and fall times such that the signals do not exceed a slew rate of 0.8V/ns. • The I2C specification defines a maximum input voltage VIH of (VDD max + 0.5V), which exceeds the absolute maximum ratings for the device IOs. The system must be designed to make sure the I2C signals never exceed the limits defined in the Absolute Maximum Ratings section of this data sheet. Refer to the Philips I2C-bus specification version 2.1 for timing details. For more details about features and additional description information on the device Inter-integrated Circuit, see the corresponding subsections within Signal Descriptions and Detailed Description sections. www.ti.com AM263P4, AM263P2, AM263P4-Q1, AM263P2-Q1 SPRSP81D – OCTOBER 2023 – REVISED MAY 2025 Copyright © 2025 Texas Instruments Incorporated Submit Document Feedback 111 Product Folder Links: AM263P4 AM263P2 AM263P4-Q1 AM263P2-Q1 |
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