Peripheral Simulation

For NXP (founded by Philips) LPC1751 — I2C Interfaces 0-2

Simulation support for this peripheral or feature is comprised of:

• Dialog boxes which display and allow you to change peripheral configuration.

These simulation capabilities are described below.

I2C 0 Hardware Dialog

The I2C Hardware dialog configures one of the on-chip I2C controllers. Each I2C controller fully supports master or slave operations. The following groups control the simulation of the I2C Interfaces:

I2C Control Group

• I2CnCONSET (I2C Control Set Register) is used to set bits in the I2C control register. A bit value of zero in this register has no effect on the I2C control register. It contains the following control bits:
• I2EN (Enable) is set to enable this I2C interface.
• STA (Start) is set to enter master mode and send a START condition.
• STO (Stop) is set to send a STOP condition in master mode, and recover from an error in slave mode.
• AA (Assert ACK) is set to request an acknowledge be returned from the slave device.
• SI (Interrupt) is set to indicate a state change in the I2C controller.

• I2CnCONCLR (I2C Control Clear Register) is used to clear bits in the I2C control register. A bit value of zero in this register has no effect on the I2C control register. It contains the following control bits:
• I2ENC disables the I2C controller.
• STAC clears the START flag.
• AAC clears the Assert ACK flag.
• SIC clears the I2C interrupt flag.

Clock Rate Group

• I2CnSCLL (I2C SCL Low Duty Cycle Register) contains the SCL Low Duty Cycle count.
• I2CnSCLH (I2C SCL High Duty Cycle Register) contains the SCL High Duty Cycle count.
• Master Clock displays the serial clock.

Status Group

• I2CnSTAT (Slave Status Register) contains I2C interface status code. The Device Mode and Status display a decoded description of the interface status register value.

Address Group

• I2CnADR (I2C Slave Address Register) contains the value of the I2C slave address register. This register is only valid in Slave mode.
• Device Address contains the slave device address.
• GC is set to respond to a General Call address(0x00).

Data Group

• I2CnDAT contains the data byte to be sent or the last data byte received.