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參數資料
| 型號： | SC16C852SVIET |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 1.8 V dual UART, 20 Mbit-s (max.) with 128-byte FIFOs, infrared (IrDA), and XScale VLIO bus interface |
| 中文描述： | 2 CHANNEL(S), 5M bps, SERIAL COMM CONTROLLER, PBGA36 |
| 封裝： | 3.50 X 3.50 MM, 0.80 MM HEIGHT, ROHS COMPLIANT, PLASTIC, SOT-912-1, TFBGA-36 |
| 文件頁數： | 12/48頁 |
| 文件大?。?/td> | 221K |
| 代理商： | SC16C852SVIET |
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SC16C852SV_1
NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 01 — 23 September 2008
12 of 48
NXP Semiconductors
SC16C852SV
Dual UART with 128-byte FIFOs, IrDA, and XScale VLIO bus interface
6.9 Programmable baud rate generator
The SC16C852SV 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
SC16C852SV 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.
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;
SAMPR is the sampling rate in SAMPR register (16
×
, 8
×
, 4
×
)
Prescaler = 1 when MCR[7] is set to 0.
Prescaler = 4 when MCR[7] is set to 1.
Remark:
should always be less than 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 SC16C852SV 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 5
). Alternatively, an external clock can be connected
to the XTAL1 pin (see
Figure 6
) 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
SC16C852SV 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 the baud
rate generator.
Fig 4.
Prescalers and baud rate generator block diagram
baud rate
f
MCR 7
SAMPR
N
SAMPR
-------------------
+
×
×
------------------------------------------------------------------------------------------------
=
M
SAMPR
-------------------
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
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相關代理商/技術參數 |
參數描述 |
|---|---|
| SC16C852SVIET,115 | 功能描述:UART 接口集成電路 UART 2-CH 128Byte FIFO 1.8V 36-Pin RoHS:否 制造商:Texas Instruments 通道數量:2 數據速率: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 |
| SC16C852SVIET,151 | 功能描述:UART 接口集成電路 UART 2-CH 128Byte FIFO 1.8V 36-Pin RoHS:否 制造商:Texas Instruments 通道數量:2 數據速率: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 |
| SC16C852SVIET,157 | 功能描述:UART 接口集成電路 UART 2-CH 128Byte FIFO 1.8V 36-Pin RoHS:否 制造商:Texas Instruments 通道數量:2 數據速率: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 |
| SC16C852V | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Dual UART with 128-byte FIFOs, IrDA, and XScale VLIO bus interface |
| SC16C852V_08 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:1.8 V dual UART, 5 Mbit/s (max.) with 128-byte FIFOs, infrared (IrDA), and XScale VLIO bus interface |
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