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參數(shù)資料
| 型號： | a8251 |
| 廠商： | Altera Corporation |
| 英文描述： | Programmable Communications Interface(可編程通信接口) |
| 中文描述： | 可編程通信接口（可編程通信接口） |
| 文件頁數(shù)： | 1/21頁 |
| 文件大?。?/td> | 338K |
| 代理商： | A8251 |
Altera Corporation
25
a8251
Programmable Communications
Interface
June 1997, ver. 2
Data Sheet
A-DS-A8251-2
Features
I
a8251
microprocessor and a serial communication channel
Optimized for FLEX
architecture
Programmable word length, stop bits, and parity
Offers divide-by-1, -16, or -64 mode
Supports synchronous and asynchronous operation
Uses approximately 528 FLEX logic elements (LEs)
Includes:
–
Error detection
–
False start bit detection
–
Automatic break detection
–
Internal and external sync character detection
Functionally based on the Intel M8251A device, except as noted in the
“Variations & Clarifications” on page 44
MegaCore function that provides an interface between a
I
I
I
I
I
I
I
General
Description
The
microprocessor and a serial communications channel. The
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. The transmitter
and receiver can be designed for synchronous or asynchronous operation.
See
Figure 1
.
a8251
MegaCore function provides an interface between a
a8251
receives
Figure 1. a8251 Symbol
CLK
CnD
DIN[7..0]
EXTSYNCD
nCS
nCTS
nDSR
nRD
nRXC
nTXC
nWR
RESET
RXD
A8251
DOUT[7..0]
nDTR
nEN
nRTS
RXRDY
SYN_BRK
TXD
TXEMPTY
TXRDY
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