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16C450 の電気的特性と機能

16C450のメーカーはExar Corporationです、この部品の機能は「ST16C450」です。


製品の詳細 ( Datasheet PDF )

部品番号 16C450
部品説明 ST16C450
メーカ Exar Corporation
ロゴ Exar Corporation ロゴ 




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16C450 Datasheet, 16C450 PDF,ピン配置, 機能
GENERAL DESCRIPTION
The ST16C450 is a universal asynchronous receiver
and transmitter. The ST16C450 is an improved ver-
sion of the NS16450 UART with higher operating
speed and lower access time. A programmable baud
rate generator is provided to select transmit and
www.DataSheet4U.croemceive clock rates from 50 Bps to 1.5 Mbps.
The ST16C450 on board status registers provides the
error conditions, type and status of the transfer
operation being performed. Included is complete
MODEM control capability, and a processor interrupt
system that may be software tailored to the user’s
requirements. The ST16C450 provides internal loop-
back capability for on board diagnostic testing.
The ST16C450 is available in 40 pin PDIP, 44 pin
PLCC, and 48 pin TQFP packages. It is fabricated in
an advanced CMOS process to achieve low drain
power and high speed requirements.
ST16C450
UNIVERSAL ASYNCHRONOUS
RECEIVER/TRANSMITTER (UART)
September 2003
PLCC Package
D5
D6
D7
RCLK
RX
N.C.
TX
CS0
CS1
-CS2
-BAUDOUT
7
8
9
10
11
12
13
14
15
16
17
ST16C450CJ44
39 RESET
38 -OP1
37 -DTR
36 -RTS
35 -OP2
34 N.C.
33 INT
32 N.C.
31 A0
30 A1
29 A2
FEATURES
Pin to pin and functionally compatible to the Indus-
try Standard 16450
2.97 to 5.5 volt operation
1.5 Mbps transmit/receive operation (24MHz)
Programmable word lengths (5, 6, 7, 8)
Even, odd, force, or no parity generation and
detection
Independent transmit and receive control
Standard modem interface
Low operating current ( 1.2mA typ.)
ORDERING INFORMATION
Part number
ST16C450CP40
ST16C450CJ44
ST16C450CQ48
ST16C450IP40
ST16C450IJ44
ST16C450IQ48
Package
40-Lead PDIP
44-Lead PLCC
48-Lead TQFP
40-Lead PDIP
44-Lead PLCC
48-Lead TQFP
Operating temperature
0° C to + 70° C
0° C to + 70° C
0° C to + 70° C
-40° C to + 85° C
-40° C to + 85° C
-40° C to + 85° C
Device Status
Active. See the ST16C450CQ48 for new designs.
Active
Active
Active. See the ST16C450IQ48 for new designs.
Active
Active
Rev. 4.20
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 (510) 668-7000 FAX (510) 668-7017

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16C450 pdf, ピン配列
www.DataSheet4U.com
D0-D7
-IOR,IOR
-IOW,IOW
RESET
A0-A2
-AS
CS0,CS1
-CS2
-DDIS
CSOUT
INT
ST16C450
Figure 2, BLOCK DIAGRAM
Transmit
Shift
Register
TX
Receive
Shift
Register
RX
Clock
&
Baud Rate
Generator
Modem
Control
Logic
-DTR,-RTS
-OP1,-OP2
-CTS
-RI
-CD
-DSR
Rev. 4.20
3


3Pages


16C450 電子部品, 半導体
ST16C450
SYMBOL DESCRIPTION
Symbol
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-OP2
VCC
XTAL1
XTAL2
-CD
-CTS
-DSR
-DTR
Pin Signal
40 44 48 type
Pin Description
31 35 31 O Output-2 (User Defined). This pin provides the user a general
purpose output. See bit-3 modem control register (MCR bit-
3).
40 44
42 Pwr Power Supply Input.
16 18 14
I Crystal or External Clock Input - Functions as a crystal input
or as an external clock input. A crystal can be connected
between this pin and XTAL2 to form an internal oscillator
circuit. An external 1 MW resistor is required between the
XTAL1 and XTAL2 pins (see figure 3). Alternatively, an
external clock can be connected to this pin to provide
custom data rates (Programming Baud Rate Generator
section).
17 19 15 O Output of the Crystal Oscillator or Buffered Clock - (See also
XTAL1). Crystal oscillator output or buffered clock output.
38 42 40 I Carrier Detect (active low) - A logic 0 on this pin indicates
that a carrier has been detected by the modem.
36 40 38
I Clear to Send (active low) - A logic 0 on the -CTS pin
indicates the modem or data set is ready to accept transmit
data from the ST16C450. Status can be tested by reading
MSR bit-4. This pin has no effect on the UART’s transmit or
receive operation.
37 41 39
I Data Set Ready (active low) - A logic 0 on this pin indicates
the modem or data set is powered-on and is ready for data
exchange with the UART. This pin has no effect on the
UART’s transmit or receive operation.
33 37 33 O Data Terminal Ready (active low) - A logic 0 on this pin
indicates that the ST16C450 is powered-on and ready. This
pin can be controlled via the modem control register.
Writing a logic 1 to MCR bit-0 will set the -DTR output to
logic 0, enabling the modem. This pin will be a logic 1 after
writing a logic 0 to MCR bit-0, or after a reset. This pin has
no effect on the UART’s transmit or receive operation.
Rev. 4.20
6

6 Page



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部品番号部品説明メーカ
16C450

ST16C450

Exar Corporation
Exar Corporation


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