Z8F640x/Z8F480x/Z8F320x/Z8F240x/Z8F160x
Z8 Encore!®
78
UART
Overview
The Universal Asynchronous Receiver/Transmitter (UART) is a full-duplex communica-
tion channel capable of handling asynchronous data transfers. The Z8F640x family device
contains two fully independent UARTs. The UART uses a single 8-bit data mode with
selectable parity. Features of the UART include:
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8-bit asynchronous data transfer
Selectable even- and odd-parity generation and checking
Option of one or two Stop bits
Separate transmit and receive interrupts
Framing, parity, overrun and break detection
Separate transmit and receive enables
Selectable 9-bit multiprocessor (9-bit) mode
16-bit Baud Rate Generator (BRG)
Architecture
The UART consists of three primary functional blocks: transmitter, receiver, and baud rate
generator. The UART’s transmitter and receiver function independently, but employ the
same baud rate and data format. Figure 67 illustrates the UART architecture.
PS017610-0404
UART
ZILOG [ ZILOG, INC. ]
