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| 型号： | SC16C752BIB48,157 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 9/47页 |
| 文件大小： | 0K |
| 描述： | IC UART DUAL W/FIFO 48-LQFP |
| 产品培训模块： | Stand-Alone UARTs |
| 标准包装： | 1,250 |
| 通道数： | 2，DUART |
| FIFO's： | 64 字节 |
| 电源电压： | 2.5V，3.3V，5V |
| 带自动流量控制功能： | 是 |
| 带故障启动位检测功能： | 是 |
| 带调制解调器控制功能： | 是 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-LQFP |
| 供应商设备封装： | 48-LQFP（7x7） |
| 包装： | 托盘 |
| 产品目录页面： | 828 (CN2011-ZH PDF) |
| 其它名称： | 568-1322 935274411157 SC16C752BIB48 |
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SC16C752B
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 6 — 30 November 2010
17 of 47
NXP Semiconductors
SC16C752B
5 V, 2.2 V and 2.5 V dual UART, 5 Mbit/s (max.), with 64-byte FIFOs
6.8 Break and time-out conditions
An RX idle condition is detected when the receiver line, RXn, has been HIGH for
4 character time. The receiver line is sampled midway through each bit.
When a break condition occurs, the TXn line is pulled LOW. A break condition is activated
by setting LCR[6].
6.9 Programmable baud rate generator
The SC16C752B UART contains a programmable baud generator that takes any clock
input and divides it by a divisor in the range between 1 and (216
1). An additional
divide-by-4 prescaler is also available and can be selected by MCR[7], as shown in
Figure 12. The output frequency of the baud rate generator is 16
× the baud rate. The
formula for the divisor is given in Equation 1:
(1)
Where:
prescaler = 1, when MCR[7] is set to logic 0 after reset (divide-by-1 clock selected);
prescaler = 4, when MCR[7] is set to logic 1 after reset (divide-by-4 clock selected).
Remark: The default value of prescaler after reset is divide-by-1.
Figure 12 shows the internal prescaler and baud rate generator circuitry.
DLL and DLM must be written to in order to program the baud rate. DLL and DLM are the
least significant and most significant byte of the baud rate divisor. If DLL and DLM are
both zero, the UART is effectively disabled, as no baud clock will be generated.
Remark: The programmable baud rate generator is provided to select both the transmit
and receive clock rates.
1.8432 MHz and 3.072 MHz, respectively.
Figure 13 shows the crystal clock circuit reference.
Fig 12. Prescaler and baud rate generator block diagram
divisor
XTAL1 crystal input frequency
prescaler
-----------------------------------------------------------------------------------
desired baud rate
16
×
()
-----------------------------------------------------------------------------------------
=
BAUD RATE
GENERATOR
LOGIC
MCR[7] = 1
MCR[7] = 0
PRESCALER
LOGIC
(DIVIDE-BY-1)
INTERNAL
OSCILLATOR
LOGIC
002aaa233
XTAL1
XTAL2
input clock
PRESCALER
LOGIC
(DIVIDE-BY-4)
reference
clock
internal
baud rate
clock for
transmitter
and receiver
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SC16C752BIB48-F | 功能描述:UART 接口集成电路 16CB 2.5V-5V 2CH UART 64B FIFO RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
| SC16C752BIB48-S | 功能描述:UART 接口集成电路 16CB 2.5V-5V 2CH UART 64B FIFO RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
| SC16C752BIBS | 功能描述:UART 接口集成电路 16CB 2.5V-5V 2CH UART 64B FIFO RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
| SC16C752BIBS,128 | 功能描述:UART 接口集成电路 16CB 2.5V-5V 2CH RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
| SC16C752BIBS,151 | 功能描述:UART 接口集成电路 2CH. UART 64B FIFO RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
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