參數(shù)資料
型號(hào)： SC16C554IB80
廠商： NXP Semiconductors N.V.
元件分類： 收發(fā)器
英文描述： Quad UART with 16-byte FIFO and infrared (IrDA) encoder-decoder
封裝： SC16C554IB80<SOT315-1 (LQFP80)|<<http://www.nxp.com/packages/SOT315-1.html<1<week 17, 2005,;
文件頁(yè)數(shù)： 18/55頁(yè)
文件大小： 276K
代理商： SC16C554IB80
Philips Semiconductors
SC16C554/554D
Quad UART with 16-byte FIFO and infrared (IrDA) encoder/decoder
Product data
Rev. 05 — 10 May 2004
18 of 55
9397 750 13132
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
6.10 Programmable baud rate generator
The SC16C554/554D supports high speed modem technologies that have increased
input data rates by employing data compression schemes. For example, a 33.6 kbit/s
modem that employs data compression may require a 115.2 kbit/s input data rate.
A 128.0 kbit/s ISDN modem that supports data compression may need an input
data rate of 460.8 kbit/s.
A single baud rate generator is provided for the transmitter and receiver, allowing
independent TX/RX channel control. The programmable Baud Rate Generator is
capable of accepting an input clock up to 80 MHz (for 3.3 V and 5 V operation), as
required for supporting a 5 Mbit/s data rate. The SC16C554/554D can be configured
for internal or external clock operation. For internal clock oscillator operation, an
industry standard microprocessor crystal (parallel resonant/22-33 pF load) is
connected externally between the XTAL1 and XTAL2 pins (see
Figure 7
).
Alternatively, an external clock can be connected to the XTAL1 pin to clock the
internal baud rate generator for standard or custom rates (see
Table 7
).
Programming the Baud Rate Generator Registers DLM (MSB) and DLL (LSB)
provides a user capability for selecting the desired final baud rate.
Fig 7.
Crystal oscillator connection.
Table 7:
Output baud rate
Baud rate generator programming table using a 7.3728 MHz clock
User
16
×
clock divisor
Decimal
HEX
2304
900
384
180
192
C0
96
60
48
30
24
18
12
0C
6
06
3
03
2
02
1
01
DLM
program value
(HEX)
DLL
program value
(HEX)
200
1200
2400
4800
9600
19.2 k
38.4 k
76.8 k
153.6 k
230.4 k
460.8 k
09
01
00
00
00
00
00
00
00
00
00
00
80
C0
60
30
18
0C
06
03
02
01
002aaa169
X1
1.8432 MHz
C1
22 pF
C2
47 pF
X
X
X1
1.8432 MHz
C1
47 pF
C2
100 pF
X
X
1.5 k
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SC16C554IB80,551 功能描述:UART 接口集成電路 16C 2.5V-5V 4CH UART 16B FIFO RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
SC16C554IB80,557 功能描述:UART 接口集成電路 16C 2.5V-5V 4CH UART 16B FIFO RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
SC16C650A 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Asynchronous Receiver/Transmitter (UART) with 32-byte FIFO and infrared (IrDA) encoder/decoder
SC16C650AIA44 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Asynchronous Receiver/Transmitter (UART) with 32-byte FIFO and infrared (IrDA) encoder/decoder
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