HCS08 datasheet(177/316 Pages) NXP

177 / 316 page

Inter-Integrated Circuit (S08IICV2)

MC9S08SG8 MCU Series Data Sheet, Rev. 8

Freescale Semiconductor

177

11.7

Initialization/Application Information

Figure 11-11. 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 11-12

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 11-12

5. Write: IICC1

— to enable TX

IICF

IICA

Baud rate = BUSCLK / (2 x MULT x (SCL DIVIDER))

TXAK

RSTA

IICC1

IICEN

IICIE

MST

Module configuration

ARBL

SRW

IICIF

RXAK

IICS

TCF

IAAS

BUSY

Module status flags

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

AD10

AD9

AD8

IICC2 GCAEN

ADEXT

Address configuration

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