Inter-Integrated Circuit Bus Controller Module (I
2
C)
MPC5510 Microcontroller Family Reference Manual, Rev. 1
27-2
Freescale Semiconductor
Preliminary
Figure 27-1. I
2
C Block Diagram
27.1.2
DMA Interface
A simple DMA interface is implemented so that the I
2
C can request data transfers with minimal support
from the CPU. DMA mode is enabled by setting bit 1 in the control register.
The DMA interface is only valid when the I
2
C module is configured for master mode and the DMA
channel mux has selected the I
2
C DMA request signals to be inputs to a DMA channel.
In/Out
Data
Shift
Register
Address
Compare
SDA
Interrupt
Clock
Control
Start
Stop
Arbitration
Control
SCL
Bus Clock
I
2
C
Registers