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µVision User's Guide
About µVision
User Interface
Creating Applications
Utilities
Debugging
Debug Commands
Debug Functions
Simulation
Digital Input
Push Button
Interrupt Signal
Impulse Patterns
Analog Input
Square Wave Signal
Saw Tooth Signal
Sine Wave
Noise Signal
Signal Combination
UART Communication
CAN Communication
Dialog Pages
Virtual Simulation Registers (VTREG)
Simulate Incoming Messages
Process Outgoing Messages
Send Periodic Messages
I²C Communication
I²C Concepts
I²C Simulation
Virtual Simulation Registers (VTREG)
Simulating an I²C Device
Application Examples
SPI Simulation
XPAGE VTREG
PPAGE VTREG
Flash Programming
Dialogs
Example Programs
Command Line
Appendix
I²C Concepts
The I²C bus is available on several 8051, 251, and C16x, XE16x, and XC20x devices and can be implemented in different ways:
- as I²C serial port with hardware implemented master and slave functions (as in NXP 80C552, 558, and several Atmel devices).
- as combined SPI/I²C interface with hardware implemented slave and software-based master functions (as in Analog Devices ADuC812, ADuC824 and several other devices).
- as single bit hardware for software-based master and slave support (as in NXP 8xC75x and NXP LPC series, described in NXP AN422 available from the NXP web page).
- using the High-Speed Serial Interface of the Infineon C16x, XE16x, and XC20x family for simulation of the I²C bus (described in the Infineon AppNote AP1626).
- as software-based simulation of an I²C bus master device. This can be implemented in any 8051 or C16x device by using two unused I/O pins as SCL and SDA pins. These I/O pins are controlled by software only.
The following I²C Simulation applies to devices with an I²C interface.
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