Operations And Setting Procedure Example - Fujitsu MB95630H Series Hardware Manual

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CHAPTER 24 I C BUS INTERFACE

24.6 Operations and Setting Procedure Example

24.6 Operations and Setting Procedure Example
This section describes the operations of the I
■ Operations of I 2
● I 2
C bus interface
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The I C bus interface is an 8-bit serial interface synchronized with a shift clock. It conforms to
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the I C bus specification defined by Philips.
● MCU standby mode wakeup function
The wakeup function wakes up the MCU upon detection of a start condition, from low power
consumption mode such as stop or watch mode.
■ Setting Procedure Example
Below is an example of procedure for setting the I
● Initial settings
1. Set the port for input. (DDR)
2. Set the interrupt level. (ILR*)
3. Set the slave address. (IAARn)
4. Select the clock and enable I
5. Enable bus error interrupt requests. (IBCR1n:BEIE = 1)
*: For details of the interrupt level setting register (ILR), refer to "CHAPTER 5 INTERRUPTS" in this
hardware manual and "■ INTERRUPT SOURCE TABLE" in the device data sheet.
● Interrupt processing
1. Execute any process.
2. Clear the bus error interrupt request flag. (IBCR1n:BER = 0)
502
C Bus Interface
2
C operation. (ICCRn)
FUJITSU SEMICONDUCTOR LIMITED
MB95630H Series
2
C bus interface.
2
C bus interface.
MN702-00009-1v0-E