參數(shù)資料
型號(hào)： SC16C850VIBS
廠(chǎng)商： NXP Semiconductors N.V.
元件分類(lèi)： 收發(fā)器
英文描述： 1.8 V single UART, 5 Mbit-s (max.) with 128-byte FIFOs, infrared (IrDA), and XScale VLIO bus interface
封裝： SC16C850VIBS<SOT617-1 (HVQFN32)|<<http://www.nxp.com/packages/SOT617-1.html<1<Always Pb-free,;SC16C850VIBS<SOT617-1 (HVQFN32)|<<http://www.nxp.com/packages/SOT617-1.html&
文件頁(yè)數(shù)： 11/48頁(yè)
文件大?。?/td> 338K
代理商： SC16C850VIBS
SC16C850V
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 5 — 19 January 2011
11 of 48
NXP Semiconductors
SC16C850V
Single UART with 128-byte FIFOs, IrDA, and XScale VLIO bus interface
6.9 Programmable baud rate generator
The SC16C850V UART contains a programmable rational baud rate generator that takes
any clock input and divides it by a divisor in the range between 1 and (2
16
1). The
SC16C850V offers the capability of dividing the input frequency by rational divisor. The
fractional part of the divisor is controlled by the CLKPRES register in the First Extra
Register Set.
(1)
where:
N is the integer part of the divisor in DLL and DLM registers;
M is the fractional part of the divisor in CLKPRES register;
f
XTAL1
is the clock frequency at XTAL1 pin.
Prescaler = 1 when MCR[7] is set to 0.
Prescaler = 4 when MCR[7] is set to 1.
A single baud rate generator is provided for the transmitter and receiver. The
programmable Baud Rate Generator is capable of operating with a frequency of up to
80 MHz. To obtain maximum data rate, it is necessary to use full rail swing on the clock
input. The SC16C850V can be configured for internal or external clock operation. For
internal clock operation, an industry standard crystal is connected externally between the
XTAL1 and XTAL2 pins (see
Figure 4
). Alternatively, an external clock can be connected
to the XTAL1 pin (see
Figure 5
) to clock the internal baud rate generator for standard or
custom rates (see
Table 6
).
The generator divides the input 16
×
clock by any divisor from 1 to (2
16
1). The
SC16C850V divides the basic external clock by 16. The baud rate is configured via the
CLKPRES, DLL and DLM internal register functions. Customized baud rates can be
achieved by selecting the proper divisor values for the MSB and LSB sections of baud
rate generator.
Programming the baud rate generator registers CLKPRES, DLM (MSB) and DLL (LSB)
provides a user capability for selecting the desired final baud rate. The example in
Table 6
shows the selectable baud rate table available when using a 1.8432 MHz external clock
input with MCR[7] is 0, and CLKPRES = 0x00.
Fig 3.
Prescalers and baud rate generator block diagram
baud
rate
f
MCR 7
16
N
16
-----
+
×
×
-------------------------------------------------------------------
=
002aac645
OSCILLATOR
XTAL1
XTAL2
DIVIDE-BY-1
DIVIDE-BY-4
CLKPRES
[3:0]
BAUD RATE
GENERATOR
(DLL, DLM)
transmitter and
receiver clock
MCR[7] = 0
MCR[7] = 1
相關(guān)PDF資料
PDF描述
SC16C852LIB 1.8 V dual UART, 5 Mbit-s (max.) with 128-byte FIFOs, infrared (IrDA) and 16 mode or 68 mode bus interface
SC16C852LIBS 1.8 V dual UART, 5 Mbit-s (max.) with 128-byte FIFOs, infrared (IrDA) and 16 mode or 68 mode bus interface
SC16C852LIET 1.8 V dual UART, 5 Mbit-s (max.) with 128-byte FIFOs, infrared (IrDA) and 16 mode or 68 mode bus interface
SC16C852SVIET 1.8 V dual UART, 20 Mbit-s (max.) with 128-byte FIFOs, infrared (IrDA), and XScale VLIO bus interface
SC16C852VIET 1.8 V dual UART, 5 Mbit-s (max.) with 128-byte FIFOs, infrared (IrDA) and XScale VLIO bus interface
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SC16C850VIBS,115 功能描述:UART 接口集成電路 1.8V 1 CH UART 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
SC16C850VIBS,128 功能描述:UART 接口集成電路 1.8V 1 CH UART 128B 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
SC16C850VIBS,151 功能描述:UART 接口集成電路 1.8V 1 CH UART 128B 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
SC16C850VIBS,157 功能描述:UART 接口集成電路 1.8V 1 CH UART 128B 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
SC16C850VIBS-F 功能描述:UART 接口集成電路 1.8V 1 CH UART 128B FIFO VLIO 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
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