Z8F1601 Datasheet, PDF (115/246 Pages) Zilog, Inc. – Z8 Encore Microcontrollers with Flash Memory and 10-Bit A/D Converter

Z8F640x/Z8F480x/Z8F320x/Z8F240x/Z8F160x
Z8 Encore!^®
97
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 72. 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 73 illustrates data recep-
tion. When the Infrared Endec is enabled, the UART’s RXD signal is internal to the
Z8F640x family device while the IR_RXD signal is received through the RXD pin.
PS017610-0404
Infrared Encoder/Decoder