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ZLR64400ROMMCU Datasheet(PDF) 52 Page - Zilog, Inc.

Part # ZLR64400ROMMCU
Description  ZLR64400 ROM MCU with Learning Amplification
PDF  155 Pages
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Manufacturer  ZILOG [Zilog, Inc.]
Direct Link  http://www.zilog.com
Logo ZILOG - Zilog, Inc.

ZLR64400ROMMCU Datasheet(HTML) 52 Page - Zilog, Inc.

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PS024502-1205
P R E L I M I N A R Y
UART
ZLR64400 ROM MCU
Product Specification
42
UART
The Universal Asynchronous Receiver/Transmitter (UART) is a full-duplex communica-
tion channel capable of handling asynchronous data transfers. The two UARTs use a single
8-bit data mode with selectable parity. Features of the UARTs include:
• 8-bit asynchronous data transfer
• Selectable even- and odd-parity generation and checking
• One or two Stop bits
• Separate transmit and receive interrupts
• Framing, overrun, and break detection
• Separate transmit and receive enables
• 8-bit Baud Rate Generator (BRG)
• Baud Rate Generator timer mode
• UART operational during HALT mode
Architecture
The UARTs consist of three primary functional blocks: transmitter, receiver, and Baud
Rate Generator. The UART transmitter and receiver function independently, but employ
the same baud rate and data format. Figure 13 illustrates the UART architecture.
Table 20. UART Control Registers
Address (Hex)
Reset
12-Bit
Bank 8-Bit
Register Description
Mnemonic
Page #
0F1
All
F1
UART Receive/Transmit Data Register
URDATA/
UTDATA
XXh
51
0F2
All
F2
UART Status Register
UST
0000_0010b
52
0F3
All
F3
UART Control Register
UCTL
00h
53
0F4
All
F4
UART Baud Rate Generator Constant
BCNST
FFh
54



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