mc9s08sg4 Freescale Semiconductor, Inc, mc9s08sg4 Datasheet - Page 174
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mc9s08sg4
Manufacturer Part Number
mc9s08sg4
Description
8-bit Microcontroller Family
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC9S08SG4.pdf
(320 pages)
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Chapter 11 Inter-Integrated Circuit (S08IICV2)
11.7
174
1.
2.
3.
4.
5.
1.
2.
3.
4.
5.
6.
7.
Write: IICC2
— to enable or disable general call
— to select 10-bit or 7-bit addressing mode
Write: IICA
— to set the slave address
Write: IICC1
— to enable IIC and interrupts
Initialize RAM variables (IICEN = 1 and IICIE = 1) for transmit data
Initialize RAM variables used to achieve the routine shown in Figure 11-12
Write: IICF
— to set the IIC baud rate (example provided in this chapter)
Write: IICC1
— to enable IIC and interrupts
Initialize RAM variables (IICEN = 1 and IICIE = 1) for transmit data
Initialize RAM variables used to achieve the routine shown in Figure 11-12
Write: IICC1
— to enable TX
Write: IICC1
— to enable MST (master mode)
Write: IICD
— with the address of the target slave. (The lsb of this byte determines whether the communication is
The routine shown in Figure 11-12 can handle both master and slave IIC operations. For slave operation, an
incoming IIC message that contains the proper address begins IIC communication. For master operation,
communication must be initiated by writing to the IICD register.
Initialization/Application Information
IICC1
IICC2 GCAEN ADEXT
IICD
IICA
IICF
IICS
master receive or transmit.)
When addressed as a slave (in slave mode), the module responds to this address
Baud rate = BUSCLK / (2 x MULT x (SCL DIVIDER))
Module configuration
Module status flags
Data register; Write to transmit IIC data read to read IIC data
Address configuration
IICEN
TCF
MULT
IAAS
IICIE
MC9S08SG8 MCU Series Data Sheet, Rev. 3
BUSY
Figure 11-11. IIC Module Quick Start
MST
Module Initialization (Master)
0
Module Initialization (Slave)
Register Model
Module Use
ARBL
TX
AD[7:1]
0
DATA
TXAK
0
0
ICR
RSTA
SRW
AD10
IICIF
AD9
0
RXAK
AD8
0
0
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