Z8F4822AR020SG Datasheet, PDF (129/323 Pages) Zilog, Inc. – High Performance 8-Bit Microcontrollers

Z8 Encore! XP^® F64xx Series
Product Specification
109
Infrared Encoder/Decoder
The Z8 Encore! XP F64xx Series products contain two fully-functional, high-performance
UART-to-infrared encoders/decoders (endecs). Each infrared endec is integrated with an
on-chip UART to allow easy communication between the Z8 Encore! XP F64xx Series
and IrDA Physical Layer Specification Version 1.3-compliant infrared transceivers. Infra-
red communication provides secure, reliable, low-cost, point-to-point communication
between PCs, PDAs, cell phones, printers, and other infrared enabled devices.
Architecture
Figure 19 displays the architecture of the infrared endec.
System
Clock
UART
RxD
TxD
Baud Rate
Clock
Infrared
Encoder/Decoder
(Endec)
Zilog
ZHX1810
RxD
RxD
TxD
TxD
Infrared
Transceiver
Interrupt I/O
Data
Signal Address
Figure 19. Infrared Data Communication System Block Diagram
Operation
When the infrared endec is enabled, the transmit data from the associated on-chip UART
is encoded as digital signals in accordance with the IrDA standard and output to the infra-
red transceiver via the TxD pin. Likewise, data received from the infrared transceiver is
passed to the infrared endec via the RxD pin, decoded by the infrared endec, and then
PS019924-0113
PRELIMINARY
Infrared Encoder/Decoder