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參數(shù)資料
型號: ST68C454
廠商: Exar Corporation
英文描述: QUAD UNIVERSAL ASYNCHRONOUS RECEIVER/TRANSMITTER (UART)
中文描述: 四通用異步接收/發(fā)送器(UART)
文件頁數(shù): 1/30頁
文件大?。?/td> 378K
代理商: ST68C454
EXAR
Corporation, 48720 Kato Road, Fremont, CA 94538
(510) 668-7000
FAX (510) 668-7017
ST16C454
ST68C454
Rev. 3.20
QUAD UNIVERSAL ASYNCHRONOUS
RECEIVER/TRANSMITTER (UART)
DESCRIPTION
The ST16C454 is a universal asynchronous receiver
and transmitter (UART) with a dual foot print interface.
The 454 is an enhanced UART with data rates up to
1.5Mbps and software compatible to ST16C450.
Onboard status registers provide the user with error
indications and operational status, modem interface
control. System interrupts may be tailored to meet
user requirements. An internal loop-back capability
allows onboard diagnostics. The ST16C454 offer an
additional 68 mode which allows easy integration with
Motorola, and other popular microprocessors. The
454 combines the package interface modes of the
ST16C454 and ST68C454 series on a single inte-
grated chip.
FEATURES
Software compatibility with the Industry Standard
16C450
1.5 Mbps transmit/receive operation (24MHz)
Independent transmit and receive control
Software selectable Baud Rate Generator
Modem control signals (-CTS, -RTS, -DSR, -DTR,
-RI, -CD)
Programmable character lengths (5, 6, 7, 8)
Even, odd, or no parity bit generation and detection
Internal loop-back diagnostics
TTL compatible inputs, outputs
Low power
ORDERING INFORMATION
Part number
ST16C454CJ68
ST16C454IJ68
Pins Package
68
PLCC
68
PLCC
Operating temperature
0° C to + 70° C
-40° C to + 85° C
9
8
7
6
5
4
3
2
1
6
6
6
6
6
6
6
6
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
2
2
2
3
3
3
3
3
3
3
3
3
3
4
4
4
4
-DSRA
-CTSA
-DTRA
VCC
-RTSA
INTA
-CSA
TXA
-IOW
TXB
-CSB
INTB
-RTSB
GND
-DTRB
-CTSB
-DSRB
-
-
R
V
1
A
A
A
X
X
R
N
N
G
R
-
-
-DSRD
-CTSD
-DTRD
GND
-RTSD
INTD
-CSD
TXD
-IOR
TXC
-CSC
INTC
-RTSC
VCC
-DTRC
-CTSC
-DSRC
-
-
R
G
D
D
D
D
D
D
D
D
I
V
R
-
-
ST16C454CJ68
16 MODE
PLCC Package
9
8
7
6
5
4
3
2
1
6
6
6
6
6
6
6
6
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
2
2
2
3
3
3
3
3
3
3
3
3
3
4
4
4
4
-DSRA
-CTSA
-DTRA
VCC
-RTSA
-IRQ
-CS
TXA
R/-W
TXB
A3
N.C.
-RTSB
GND
-DTRB
-CTSB
-DSRB
-
-
R
V
1
A
A
A
X
X
-
N
N
G
R
-
-
-DSRD
-CTSD
-DTRD
GND
-RTSD
N.C.
N.C.
TXD
N.C.
TXC
A4
N.C.
-RTSC
VCC
-DTRC
-CTSC
-DSRC
-
-
R
G
D
D
D
D
D
D
D
D
N
V
R
-
-
ST16C454CJ68
68 MODE
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