EZ80F91MCU ZILOG [Zilog, Inc.], EZ80F91MCU Datasheet - Page 223

• Manufacturer Part Number: EZ80F91MCU
• Description: eZ80Acclaim-TM Flash Microcontrollers
• Manufacturer: ZILOG [Zilog, Inc.]

Infrared Encoder/Decoder
Figure 36. Infrared System Block Diagram
PS019209-0504
System
Clock
Functional Description
Interrupt
Signal
The eZ80F91 device contains a UART to an infrared encoder/decoder (endec).
The endec is integrated with the on-chip UART0 to allow easy communication
between the CPU and IrDA Physical Layer Specification Version 1.4-compatible
infrared transceivers, as illustrated in Figure 36. Infrared communication provides
secure, reliable, high-speed, low-cost, point-to-point communication between
PCs, PDAs, mobile telephones, printers and other infrared-enabled devices.
When the endec 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 endec 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, which supports IrDA
standard baud rates from 9600 bits/s to 115.2 KBPS. Higher baud rates are possi-
Address
UART0
I/O
Data
To eZ80 CPU
Baud Rate
eZ80F91
Clock
RxD
TxD
®
P R E L I M I N A R Y
Encoder/Decoder
Infrared
Address
I/O
Data
IR_RxD
IR_TxD
Product Specification
Infrared Encoder/Decoder
eZ80F91 MCU
RxD
TxD
Transceiver
Infrared
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