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TDA4AL...ALZQ1 数据表(PDF) 190 Page - Texas Instruments |
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TDA4AL...ALZQ1 数据表(HTML) 190 Page - Texas Instruments |
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190 / 251 page  D3 D1 RESETn HYPERBUS_TIMING_03 CSn Figure 7-68. HyperBus Timing Diagrams – Reset For more information, see HyperBus Interface section in Peripherals chapter in the device TRM. 7.10.5.12 I2C The device contains several 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 IO Buffers are not fully compliant to the I2C electrical specification. Some I2C instances use the LVCMOS Buffer Type, while other instances use the I2S OD FS Buffer type. See the Pin Attributes table to determine the IO Buffer Type used for each I2C instance on this device. The I2C speeds supported and exceptions are described per IO Buffer Type below: • I2C instances that use the LVCMOS buffer type – Speeds: • Standard-mode (up to 100 Kbits/s) – 1.8 V – 3.3 V • Fast-mode (up to 400 Kbits/s) – 1.8 V – 3.3 V – Exceptions: • The IOs associated with these ports are not compliant to the fall time requirements defined in the I2C specification because they 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 such 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 + 0.5 V), which exceeds the absolute maximum ratings for the device IOs. The system must be designed to ensure the I2C signals never exceed the limits defined in the Absolute Maximum Ratings section of this data sheet. • I2C instances that use the I2C OD FS buffer type – Speeds: • Standard-mode (up to 100 Kbits/s) – 1.8 V – 3.3 V • Fast-mode (up to 400 Kbits/s) – 1.8 V – 3.3 V • Hs-mode (up to 3.4 Mbit/s) – 1.8 V – Exceptions: • The IOs associated with these ports were not design to support Hs-mode while operating at 3.3 V. So Hs-mode is limited to 1.8-V operation. • The rise and fall times of the I2C signals connected to these ports must not exceed a slew rate of 0.8 V/ns (or 8E+7 V/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 they do not exceed a slew rate of 0.8 V/ns. TDA4VE-Q1, TDA4AL-Q1, TDA4VL-Q1 SPRSP62 – DECEMBER 2022 www.ti.com 190 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TDA4VE-Q1 TDA4AL-Q1 TDA4VL-Q1 |
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