A16450 Datasheet, PDF (1/16 Pages) Altera Corporation – Universal Asynchronous Receiver/Transmitter

®
September 1996, ver. 1
a16450
Universal Asynchronous
Receiver/Transmitter
Data Sheet
Features
General
Description
s a16450 MegaCore function implementing a universal asynchronous
receiver/transmitter (UART)
s Optimized for FLEX^® and MAX^® architectures
s Programmable word length, stop bits, and parity
s Full duplex operation
s Programmable baud rate generator
s Prioritized interrupt control
s Internal diagnostic/loopback capabilities
s Uses approximately 372 FLEX logic elements (LEs)
s Functionally based on the National Semiconductor Corporation
NS16450 device, except as noted in “Variations & Clarifications” on
page 79
The a16450 MegaCore 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 a16450 includes an internal baud rate generator and interrupt
control. See Figure 1.
Figure 1. a16450 Symbol
A16450
nADS
CLK
CS0
CS1
nCS2
nCTS
nDCD
nDSR
MR
RCLK
RD
nRD
nRI
SIN
WR
nWR
nBAUDOUT
CSOUT
DDIS
nDTR
INTR
nOUT1
nOUT2
nRTS
SOUT
DOUT[7..0]
A[2..0]
DIN[7..0]
Altera Corporation
65
A-DS-A16450-01