Renesas IDT Tsi576, Руководство пользователя

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143
Tsi576 User Manual
June 6, 2016
Integrated Device Technology
www.idt.com
7. I
2
C Interface
Topics discussed include the following:
• “Overview”
• “Protocol Overview”
• “Block Diagram”
• “Tsi576 as I
2
C Master”
• “Tsi576 as I
2
C Slave”
• “Mailboxes”
• “SMBus Support”
• “Boot Load Sequence”
• “Error Handling”
• “Interrupt Handling”
• “Events versus Interrupts”
• “Timeouts”
• “Bus Timing”
7.1 Overview
The I
2
C Interface provides a master and slave serial interface that can be used for the following
purposes:
• Initializing device registers from an EEPROM after reset
• Reading and writing external devices on the I
2
C bus
• Reading and writing Tsi576’s internal registers for management purposes by an external I
2
C
master
The I
2
C Interface has the following features:
• Operates as a master or slave on the I
2
C bus
— Multi-master support
– Arbitrates among multiple masters for ownership of the I
2
C bus
– Automatically retries accesses if arbitration is lost
– Provides timeout indication if the Tsi576 is unable to arbitrate for the I
2
C bus