z8f1601 ZiLOG Semiconductor, z8f1601 Datasheet - Page 115

• Manufacturer Part Number: z8f1601
• Description: Z8 Encore!? Microcontroller With Flash Memory And 10-bit A/d Converter
• Manufacturer: ZiLOG Semiconductor

PS017609-0803
Baud Rate
IR_TXD
UART’s
Clock
TXD
Receiving IrDA Data
7-clock
delay
Figure 72. Infrared Data Transmission
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.
Start Bit = 0
16-clock
period
3-clock
pulse
Data Bit 0 = 1
Data Bit 1 = 0
Z8F640x/Z8F480x/Z8F320x/Z8F240x/Z8F160x
Data Bit 2 = 1
Infrared Encoder/Decoder
Data Bit 3 = 1
Z8 Encore!
®
97