mc9s08qg4 Freescale Semiconductor, Inc, mc9s08qg4 Datasheet - Page 157

• Manufacturer Part Number: mc9s08qg4
• Description: Hcs08 Microcontrollers Microcontroller Family
• Manufacturer: Freescale Semiconductor, Inc

Chapter 11
Inter-Integrated Circuit (S08IICV1)
11.1
Introduction
The inter-integrated circuit (IIC) provides a method of communication between a number of devices. The
interface is designed to operate up to 100 kbps with maximum bus loading and timing. The device is
capable of operating at higher baud rates, up to a maximum of clock/20, with reduced bus loading. The
maximum communication length and the number of devices that can be connected are limited by a
maximum bus capacitance of 400 pF.
11.1.1
Module Configuration
The IIC module pins, SDA and SCL can be repositioned under software control using IICPS in SOPT2 as
as shown in
Table
11-1. IICPS in SOPT2 selects which general-purpose I/O ports are associated with IIC
operation.
Table 11-1. IIC Position Options
IICPS in SOPT2
Port Pin for SDA
Port Pin for SCL
0 (default)
PTA2
PTA3
1
PTB6
PTB7
Figure 11-1
is the MC9S08QG8/4 block diagram with the IIC block highlighted.
MC9S08QG8 and MC9S08QG4 Data Sheet, Rev. 4
Freescale Semiconductor
157