a16450
Universal Asynchronous
Receiver/Transmitter
®
September 1996, ver. 1
Data Sheet
■ a16450MegaCore function implementing a universal asynchronous
Features
receiver/transmitter (UART)
®
®
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Optimized for FLEX and MAX architectures
Programmable word length, stop bits, and parity
Full duplex operation
Programmable baud rate generator
Prioritized interrupt control
Internal diagnostic/loopback capabilities
Uses approximately 372 FLEX logic elements (LEs)
Functionally based on the National Semiconductor Corporation
NS16450 device, except as noted in “Variations & Clarifications” on
page 79
The a16450MegaCore function implements a universal asynchronous
receiver/transmitter (UART), which provides an interface between a
microprocessor and a serial communications channel. The a16450
receives and transmits data in a variety of configurations, including 5-, 6-,
7-, or 8-bit data words; odd, even, or no parity; and 1, 1.5, or 2 stop bits.
The a16450includes an internal baud rate generator and interrupt
control. See Figure 1.
General
Description
Figure 1. a16450 Symbol
A16450
nADS
CLK
CS0
CS1
nCS2
nCTS
nDCD
nDSR
MR
nBAUDOUT
CSOUT
DDIS
nDTR
INTR
RCLK
RD
nRD
nOUT1
nOUT2
nRTS
nRI
SOUT
SIN
DOUT[7..0]
WR
nWR
A[2..0]
DIN[7..0]
Altera Corporation
65
A-DS-A16450-01
ALTERA [ ALTERA CORPORATION ]
