EZ80F91MCU ZILOG [Zilog, Inc.], EZ80F91MCU Datasheet - Page 202

• Manufacturer Part Number: EZ80F91MCU
• Description: eZ80Acclaim-TM Flash Microcontrollers
• Manufacturer: ZILOG [Zilog, Inc.]

Universal Asynchronous Receiver/
Transmitter
PS019209-0504
The UART module implements all of the logic required to support the asynchro-
nous communications protocol. The module also implements two separate 16-
byte-deep FIFOs for both transmission and reception. A block diagram of the
UART is illustrated in Figure 35.
Figure 35. UART Block Diagram
The UART module provides the following asynchronous communications proto-
col-related features and functions:
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•
•
•
•
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5-, 6-, 7-, 8- or 9-bit data transmission
Even/odd, space/mark, address/data, or no parity bit generation and detection
Start and stop bit generation and detection (supports up to two stop bits)
Line break detection and generation
Receiver overrun and framing errors detection
Logic and associated I/O to provide modem handshake capability
Interrupt Signal
System Clock
I/O Address
Data
P R E L I M I N A R Y
Universal Asynchronous Receiver/Transmitter
Transmit
Receive
Modem
Control
Buffer
Buffer
Logic
Product Specification
eZ80F91 MCU
RxD0/RxD1
TxD0/TxD1
CTS0/CTS1
RTS0/RTS1
DSR0/DSR1
DTR0/DTR1
DCD0/DCD1
RI0/RI1
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