z8f0822 ZiLOG Semiconductor, z8f0822 Datasheet - Page 125

• Manufacturer Part Number: z8f0822
• Description: High Performance 8-bit Microcontrollers
• Manufacturer: ZiLOG Semiconductor

Infrared Endec Control Register Definitions
PS022517-0508
Caution:
of minus four baud rate clocks to plus eight baud rate clocks around the expected time of
an incoming pulse. If an incoming pulse is detected inside this window this process is
repeated. If the incoming data is a logical 1 (no pulse), the Endec returns to the initial state
and waits for the next falling edge. As each falling edge is detected, the Endec clock
counter is reset, resynchronizing the Endec to the incoming signal. This procedure allows
the Endec to tolerate jitter and baud rate errors in the incoming data stream. Resynchroniz-
ing the Endec does not alter the operation of the UART, which ultimately receives the
data. The UART is only synchronized to the incoming data stream when a Start bit is
received.
All Infrared Endec configuration and status information is set by the UART control
registers as defined in
UART Control 1 register to 1 to enable the Infrared Endec before enabling the GPIO
Port alternate function for the corresponding pin.
To prevent spurious signals during IrDA data transmission, set the IREN bit in the
UART Control Register Definitions
Z8 Encore! XP
on page 100.
Product Specification
Infrared Encoder/Decoder
®
F0822 Series
112