IRCC2.0 SMSC Corporation, IRCC2.0 Datasheet - Page 19

• Manufacturer Part Number: IRCC2.0
• Description: Infrared Communications Controller
• Manufacturer: SMSC Corporation

INFRARED DATA ASSOCIATION
The guidelines established by the Infrared Data
Association (IrDA) are intended to facilitate the
interconnection of computers and peripherals
using
communications.
include the Serial Infrared Physical Layer Link
Specification, Version 1.1, October 17, 1995, the
Serial Infrared Link Access Protocol (IrLAP),
Version 1.1, June 16, 1996, and the Serial
Infrared Link Management Protocol (IrLMP),
Version 1.1, January 23, 1996.
SIR Interaction Pulse
The SIR Interaction Pulse (SIP) is intended to
guarantee non-disruptive coexistence with SIR-
only systems, which might otherwise interfere
with Fast IR links.
directed
GP DATA IRMODE
UART
SCE
half-duplex
Relevant IrDA documents
FIGURE 11 - IrCC 2.0 IrDA BLOCK DIAGRAM
serial
SIR Encoder
FIR Encoders
1.152 Mbps
infrared
4 Mbps
ATC
SIP
19
The Fast extensions (FIR) to the original IrDA
physical layer specification (SIR) appear as
alternate modulation/demodulation paths for data
from IrLAP bound for the IR medium and are
fundamentally transparent to IrLAP as it is
defined for SIR. IR hardware and software must
comply as a system with the entire family of IrDA
specifications, including the Physical Layer Link
Specifications, IrLAP, and IrLMP.
A block diagram of one end of an IrDA link that
includes
implementations is shown in Figure 11.
A SIP is defined as a 1.6 microsecond
transmitter
microseconds of off time (Figure 12). Once a
Fast connection has been established the station
must generate one SIP every 500ms.
Transceiver
Module
the
on
IR
SIR
pulse
and
IR Out
IR In
followed
FIR
by
physical
7.1