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Altera Corporation - Asynchronous Communications Interface Adapter

Numéro de référence A6850
Description Asynchronous Communications Interface Adapter
Fabricant Altera Corporation 
Logo Altera Corporation 





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A6850 fiche technique
September 1996, ver. 1
www.DataSheet4U.com
a6850
® Asynchronous Communications
Interface Adapter
Data Sheet
Features
General
Description
s a6850 MegaCore function implementing an asychronous
communications interface adapter (ACIA)
s Optimized for FLEX® and MAX® architectures
s Programmable word lengths, stop bits, and parity
s Offers divide-by-1, -16, or -64 mode
s Includes error detection
s Uses approximately 237 FLEX logic elements (LEs)
s Functionally based on the Motorola MC6850 device, except as noted
in the “Variations & Clarifications” section on page 94
The a6850 MegaCore function implements an ACIA, which is a universal
asynchronous receiver/transmitter (UART). The a6850 provides an
interface between a microprocessor and a serial communications channel.
The a6850 receives and transmits data in a variety of configurations,
including 7- or 8-bit data words, with odd, even, or no parity, and 1 or 2
stop bits. See Figure 1.
Figure 1. a6850 Symbol
nCTS
A6850
nDCD
E
nRESET
nIRQ
RS nRTS
RnW
TXDATA
RXCLK
DO[7..0]
RXDATA
TXCLK
CS[2..0]
DI[7..0]
Altera Corporation
A-DS-A6850-01
81

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