mc9s08sg4 Freescale Semiconductor, Inc, mc9s08sg4 Datasheet - Page 157

• Manufacturer Part Number: mc9s08sg4
• Description: 8-bit Microcontroller Family
• Manufacturer: Freescale Semiconductor, Inc

Chapter 11
Inter-Integrated Circuit (S08IICV2)
11.1
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
The IIC module pins, SDA and SCL can be repositioned under software control using IICPS in SOPT1 as
as shown in
operation.
Figure 11-1
Freescale Semiconductor
Introduction
Module Configuration
Table
shows the MC9S08SG8 block diagram with the IIC module highlighted.
The SDA and SCL should not be driven above V
open-drain containing a protection diode to V
11-1. IICPS in SOPT1 selects which general-purpose I/O ports are associated with IIC
IICPS in SOPT1
0 (default)
1
MC9S08SG8 MCU Series Data Sheet, Rev. 3
Table 11-1. IIC Position Options
Port Pin for SDA
NOTE
PTB6
PTA2
DD
DD
.
. These pins are pseudo
Port Pin for SCL
PTB7
PTA3
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