ez80l92 ZiLOG Semiconductor, ez80l92 Datasheet - Page 129

• Manufacturer Part Number: ez80l92
• Description: Ez80acclaim Flash Microcontrollers
• Manufacturer: ZiLOG Semiconductor

Infrared Encoder/Decoder
PS013014-0107
System
Clock
Functional Description
Interrupt
Signal
The eZ80L92 MCU contains a UART to infrared encoder/decoder (endec). The infrared
encoder/decoder is integrated with the on-chip UART0 to allow easy communication
between the eZ80 CPU and IrDA Physical Layer Specification Version 1.3 compliant
infrared transceivers as illustrated in
reliable, high-speed, low-cost, and point-to-point communication between PCs, PDAs,
mobile telephones, printers, and other infrared enabled devices.
When the infrared encoder/decoder is enabled, the transmit data from the on-chip UART
is encoded as digital signals in accordance with the IrDA standard and output to the
infrared transceiver. Likewise, data received from the infrared transceiver is decoded by
the infrared encoder/decoder and passed to the UART. Communication is half-duplex
meaning that simultaneous data transmission and reception is not allowed.
The baud rate is set by the UART Baud Rate Generator and supports IrDA standard baud
rates from 9600 bps to 115.2 Kbps. Higher baud rates are possible, but do not meet IrDA
specifications. The UART must be enabled to use the infrared encoder/decoder.
Address
UART0
I/O
Figure 24. Infrared System Block Diagram
Data
To eZ80 CPU
Baud Rate
eZ80L92
Clock
RxD
TxD
Encoder/Decoder
Figure
Infrared
Address
I/O
24. Infrared communication provides secure,
Data
IR_RxD
IR_TxD
Product Specification
Infrared Encoder/Decoder
RxD
TxD
Transceiver
Infrared
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