Z8F6421PM020SC Datasheet, PDF (142/299 Pages) Zilog, Inc. – High Performance 8-Bit Microcontrollers Z8 Encore-R 64K Series

Z8 Encore!^® 64K Series
Product Specification
122
Baud Rate
Clock
16-clock
period
UART’s
TXD
IR_TXD
Start Bit = 0
3-clock
pulse
Data Bit 0 = 1
Data Bit 1 = 0
Data Bit 2 = 1
Data Bit 3 = 1
7-clock
delay
Figure 20. Infrared Data Transmission
Receiving IrDA Data
Data received from the infrared transceiver via the IR_RXD signal through the RXD pin is
decoded by the Infrared Endec and passed to the UART. The UART’s baud rate clock is
used by the Infrared Endec to generate the demodulated signal (RXD) that drives the
UART. Each UART/Infrared data bit is 16-clocks wide. Figure 21 illustrates data recep-
tion. When the Infrared Endec is enabled, the UART’s RXD signal is internal to the 64K
Series products while the IR_RXD signal is received through the RXD pin.
PS019915-1005
Infrared Encoder/Decoder