NXP Semiconductors MC9S08LG16, Reference Manual

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Chapter 10 Inter-Integrated Circuit (S08IICV2)
MC9S08LG32 MCU Series, Rev. 5
Freescale Semiconductor 257
12.7 Initialization/Application Information
Figure 12-11. IIC Module Quick Start
Module Initialization (Slave)
1. Write: IICC2
— to enable or disable general call
— to select 10-bit or 7-bit addressing mode
2. Write: IICA
— to set the slave address
3. Write: IICC1
— to enable IIC and interrupts
4. Initialize RAM variables (IICEN = 1 and IICIE = 1) for transmit data
5. Initialize RAM variables used to achieve the routine shown in
Figure 12-12
Module Initialization (Master)
1. Write: IICF
— to set the IIC baud rate (example provided in this chapter)
2. Write: IICC1
— to enable IIC and interrupts
3. Initialize RAM variables (IICEN = 1 and IICIE = 1) for transmit data
4. Initialize RAM variables used to achieve the routine shown in
Figure 12-12
5. Write: IICC1
— to enable TX
0
IICF
IICA
Baud rate = BUSCLK / (2 x MULT x (SCL DIVIDER))
TX TXAK RSTA 0 0
IICC1
IICEN IICIE MST
Module configuration
ARBL 0 SRW IICIF RXAK
IICS
TCF IAAS BUSY
Module status flags
Register Model
AD[7:1]
When addressed as a slave (in slave mode), the module responds to this address
MULT
ICR
IICD
DATA
Data register; Write to transmit IIC data read to read IIC data
0 AD10 AD9 AD8
IICC2 GCAEN
ADEXT
Address configuration
0 0