
IrDA Control Peripheral Engine User’s Guide
1
IrDA Control Peripheral Engine General Description
The Sharp IrDA Control Peripheral Engine (PE) is an embedded communication controller
that fully supports IrDA Control communication services.* Using an IrDA Control PE in con-
junction with the Sharp IrDA Control Infrared Transceiver (Sharp P/N: GP2W2001YK,
GP2W2002YK) provides wireless capability for PC input peripherals, such as mice
and keyboards.
NOTE:
*IrDA Control Specification (Formerly IrBus) IrDA CIR (Control IR) Standard Final Specification, Final
Revision 1.0, June 30,1998.
PE Features
All required functions for IrDA Control communication, the Media Access Control (MAC)
layer, IrDA Control Human Input Device (HID LLC) layer are embedded in this engine chip.
Simple commands given by a Microprocessor (μP) enable the PE to perform all commu-
nication protocols for IrDA Control Infrared Wireless communication.
Optimized direct interface to Sharp IrDA Control Infrared Transceiver
(Sharp P/N: GP2W2001YK/2002YK).
Synchronous serial interface (SS-Wire) is provided for the interface between μP and PE.
Conforming to EP0, EP1, EP2 (for future extension), and EP3 as an IrDA Control
Endpoint. A single PE supports two wireless links by managing two input data channels
(for example: keyboard with pointing device).
Supporting DC BIAS scheme to reduce the interference on legacy CE remote
control systems.
Application Examples
Wireless Mice
Wireless Keyboards
Wireless Gaming Devices
Other Input Peripheral Devices (for example: composite peripheral devices)
Figure 1 shows PE interface signals. PE signal lines are generally categorized to two kinds;
interface signals with IrDA Control infrared transceiver, and serial interface signals for μP.
Figure 1. PE Interface Signals
FRESET
FECNT
IRTx
INTERFACE
SIGNAL WITH IR
TRANSCEIVER
CLOCK RELATED SIGNAL
SIGNAL INTERFACE
SIGNAL WITH
μ
P
(SS-WIRE)
IRRx1
PE
IRTxBIAS
X1
X2
CMD
MSG
SI
SO
SCK
RDY
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