LSI Logic Confidential
15-6
Serial I/O Port
Copyright © 2001, 2002 by LSI Logic Corporation. All rights reserved.
Note:
Demodulated waveforms are expected.
Figure 15.3 Philips RC-5 Protocol
In
, successive line traces show increasing detail in the IRTX
waveform (as if zooming in to reveal more detail).
SIO_IRTX and SIO_IRRX are asynchronous. The timing parameter
values are under program control, e.g., application-specific.
Demodulated waveforms are expected.
15.1.3 IR Programming Guidelines
Using the DMA Engine with IR requires that data in SDRAM be word-
aligned and that it follow a particular format. This is necessary because
the DMA Engine actually reads/writes two IR registers at once.
In non-DMA mode, in order to “write” an IR datagram, two registers must
be written sequentially: MSPL and MSPR. However, the DMA Engine
writes these two registers simultaneously by writing a single 32-bit word
with the upper bits of MSPR and MSPL concatenated. The TX data to
32 Pulses
24.889
113.778 ms
113.778 ms
5
System Bits
1.778
0
1
0
0
0
6.94
µ
s
27.777
µ
s
0
1
0
0
1
1
1
1
1
S
F
C
6
Command Bits
S = Start Bit
F = Field Bit
C = Control Bit
Содержание DMN-8600
Страница 14: ...LSI Logic Confidential xiv Contents Copyright 2001 2002 by LSI Logic Corporation All rights reserved ...
Страница 18: ...LSI Logic Confidential xviii Copyright 2001 2002 by LSI Logic Corporation All rights reserved ...
Страница 64: ...LSI Logic Confidential 7 6 Memory Mapping Copyright 2001 2002 by LSI Logic Corporation All rights reserved ...