ez80f92 ZiLOG Semiconductor, ez80f92 Datasheet - Page 131

• Manufacturer Part Number: ez80f92
• Description: Ez80acclaim Flash Microcontrollers
• Manufacturer: ZiLOG Semiconductor

Infrared Encoder/Decoder
Functional Description
PS015313-0508
The eZ80F92 device contains a UART to infrared encoder/decoder (endec). The IrDA
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 displayed in
low-cost, point-to-point communication between PCs, PDAs, mobile telephones, printers,
and other infrared-enabled devices.
When the IrDA 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, and supports IrDA standard baud
rates from 9600 bps to 115.2 kbps. Higher baud rates than 115.2 kbps are possible, but do
not meet IrDA specifications for these data rates. The UART must be enabled to use the
System
Clock
Interrupt
Signal
Figure
Address
UART0
I/O
Figure 26. Infrared System Block Diagram
26. Infrared communication provides secure, reliable, high-speed,
Data
To eZ80 CPU
Baud Rate
eZ80F92
Clock
RxD
TxD
Encoder/Decoder
Infrared
Address
I/O
Data
IR_RxD
IR_TxD
Product Specification
Infrared Encoder/Decoder
RxD
TxD
Transceiver
Infrared
124