MC9328MXS Datasheet, PDF (63/72 Pages) List of Unclassifed Manufacturers – Advance Information

Specifications
3.15 I²C Module
The I²C communication protocol consists of seven elements: START, Data Source/Recipient, Data Direction,
Slave Acknowledge, Data, Data Acknowledge, and STOP.
SDA
5
3
4
SCL
1
2
6
Figure 52. Definition of Bus Timing for I²C
Table 31. I²C Bus Timing Parameter Table
Ref No.
Parameter
1.8 ± 0.1 V
3.0 ± 0.3 V
Unit
Minimum Maximum Minimum Maximum
1
Hold time (repeated) START condition
182
–
160
–
ns
2
Data hold time
0
171
0
150
ns
3
Data setup time
11.4
–
10
–
ns
4
HIGH period of the SCL clock
80
–
120
–
ns
5
LOW period of the SCL clock
480
–
320
–
ns
6
Setup time for STOP condition
182.4
–
160
–
ns
3.16 Synchronous Serial Interface
The transmit and receive sections of the SSI can be synchronous or asynchronous. In synchronous mode, the
transmitter and the receiver use a common clock and frame synchronization signal. In asynchronous mode, the
transmitter and receiver each have their own clock and frame synchronization signals. Continuous or gated clock
mode can be selected. In continuous mode, the clock runs continuously. In gated clock mode, the clock functions
only during transmission. The internal and external clock timing diagrams are shown in Figure 54 through
Figure 56 on page 65.
Normal or network mode can also be selected. In normal mode, the SSI functions with one data word of
I/O per frame. In network mode, a frame can contain between 2 and 32 data words. Network mode is typically used
in star or ring-time division multiplex networks with other processors or codecs, allowing interface to time division
multiplexed networks without additional logic. Use of the gated clock is not allowed in network mode. These
distinctions result in the basic operating modes that allow the SSI to communicate with a wide variety of devices.
MC9328MXS Advance Information, Rev. 0
Freescale Semiconductor
63