TC1796
Functional Description
3.13
Micro Link Serial Bus Interface (MLI0, MLI1)
The Micro Link Interface (MLI) is a fast synchronous serial interface that allows to
exchange data between microcontrollers of the 32-bit AUDO microcontroller family
without intervention of a CPU or other bus masters. Figure 12 shows how two
microcontrollers are typically connected together via their MLI interfaces. The MLI
operates in both microcontrollers as a bus master on the system bus.
Controller 1
CPU
Controller 2
CPU
Peripheral
A
Peripheral
B
Peripheral
C
Peripheral
D
Memory
MLI
MLI
Memory
System Bus
System Bus
MCA05869
Figure 12
Features
Typical Micro Link Interface Connection
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Synchronous serial communication between MLI transmitters and MLI receivers
located on the same or on different microcontroller devices
Automatic data transfer/request transactions between local/remote controller
Fully transparent read/write access supported (= remote programming)
Complete address range of remote controller available
Specific frame protocol to transfer commands, addresses and data
Error control by parity bit
•
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•
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32-bit, 16-bit, and 8-bit data transfers
Programmable baud rate:
– MLI transmitter baud rate: max. fMLI/2 (= 37.5 Mbit/s @ 75 MHz module clock)
– MLI receiver baud rate: max. fMLI
•
Multiple remote (slave) controllers supported
MLI transmitter and MLI receiver communicate with other off-chip MLI receivers and MLI
transmitters via a 4-line serial I/O bus each. Several I/O lines of these I/O buses are
available outside the MLI module kernel as four-line output or input buses.
Figure 13 shows the functional blocks of the two MLI modules with its interfaces.
Data Sheet
57
V1.0, 2008-04
INFINEON [ Infineon ]
