MC9328MX1/D ETC, MC9328MX1/D Datasheet - Page 82

• Manufacturer Part Number: MC9328MX1/D
• Description: i.MX Integrated Portable System Processor
• Manufacturer: ETC

Specifications
3.20 I
The I
Slave Acknowledge, Data, Data Acknowledge, and STOP.
3.21 Synchronous Serial Interface
The MC9328MX1 processor contains two identical SSI modules. 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 65 through Figure 67 on page 84.
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.
82
2
C communication protocol consists of seven elements: START, Data Source/Recipient, Data Direction,
Ref
No.
1
2
3
4
5
6
2
C Module
Hold time (repeated) START condition
Data hold time
Data setup time
HIGH period of the SCL clock
LOW period of the SCL clock
Setup time for STOP condition
SDA
SCL
Parameter
Figure 63. Definition of Bus Timing for I
Table 39. I
1
5
MC9328MX1 Advance Information, Rev. 4
2
2
C Bus Timing Parameter Table
3
Minimum
182.4
11.4
182
480
80
0
1.8V +/- 0.10V
4
Maximum
171
–
–
–
–
–
2
C
Minimum
160
120
320
160
10
0
3.0V +/- 0.30V
Freescale Semiconductor
6
Maximum
150
–
–
–
–
–
Unit
ns
ns
ns
ns
ns
ns