TC1796
Functional Description
The downstream and upstream channels of the MSC module communicate with the
external world via nine I/O lines. Eight output lines are required for the serial
communication of the downstream channel (clock, data, and enable signals). One out of
eight input lines SDI[7:0] is used as serial data input signal for the upstream channel. The
source of the serial data to be transmitted by the downstream channel can be MSC
register contents or data that is provided at the ALTINL/ALTINH input lines. These input
lines are typically connected to other on-chip peripheral units (for example with a timer
unit like the GPTA). An emergency stop input signal allows to set bits of the serial data
stream to dedicated values in emergency case.
Clock control, address decoding, and interrupt service request control are managed
outside the MSC module kernel. Service request outputs are able to trigger an interrupt
or a DMA request.
Features
•
Fast synchronous serial interface to connect power switches in particular, or other
peripheral devices via serial buses
•
High-speed synchronous serial transmission on downstream channel
– Maximum serial output clock frequency: fFCL = fMSC/2
(= 37.5 Mbit/s @ 75 MHz module clock)
– Fractional clock divider for precise frequency control of serial clock fMSC
– Command, data, and passive frame types
– Start of serial frame: Software-controlled, timer-controlled, or free-running
– Programmable upstream data frame length (16 or 12 bits)
– Transmission with or without SEL bit
– Flexible chip select generation indicates status during serial frame transmission
– Emergency stop without CPU intervention
•
Low-speed asynchronous serial reception on upstream channel
– Baud rate: fMSC divided by 8, 16, 32, 64, 128, 256, or 512
– Standard asynchronous serial frames
– Parity error checker
– 8-to-1 input multiplexer for SDI lines
– Built-in spike filter on SDI lines
Data Sheet
53
V1.0, 2008-04
INFINEON [ Infineon ]
