DMN-8600 DVD Recorder System Processor
15-1
Copyright © 2001, 2002 by LSI Logic Corporation. All rights reserved.
LSI Logic Confidential
Chapter 15
Serial I/O Port
This chapter describes the serial I/O (SIO) port and contains the
following sections:
•
Section 15.1, “SIO IR (Infrared) Interface”
•
Section 15.2, “SIO SPI (Serial Peripheral Interface)”
•
•
Section 15.4, “SIO UART Interface”
•
Section 15.5, “SIO Register Descriptions”
The SIO consists of six peripheral modules: a serial peripheral interface
(SPI), an interdevice communications port (IDC), two UARTs, and two
infrared interfaces (IR). The following are the major features of the SIO:
•
SPI interface with bit granularity transfer support
•
Two UART interfaces (one with hardware flow control support)
•
Two IR interfaces (one with both IR blaster/IR capture, one with only
IR blaster)
•
Block data transfer to and from the SDRAM
•
DMA transfers, managed by DMA engine/SDRAM double buffers
•
Operating range: 81-150 MHz
15.1 SIO IR (Infrared) Interface
The DoMiNo IR modules off load most of the formatting and protocol
issues to software; for transmit, the IR module generates waveforms with
the programmed pulse length and period characteristics, while for
receive, it simply measures the period and duty cycle of incoming pulses.