參數資料
| 型號： | SC16C752BIB48,151 |
| 廠商： | NXP Semiconductors |
| 文件頁數： | 9/47頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DUAL UART 64BYTE 48LQFP |
| 標準包裝： | 250 |
| 通道數： | 2，DUART |
| FIFO's： | 64 字節(jié) |
| 電源電壓： | 2.5V，3.3V，5V |
| 帶自動流量控制功能： | 是 |
| 帶故障啟動位檢測功能： | 是 |
| 帶調制解調器控制功能： | 是 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 48-LQFP |
| 供應商設備封裝： | 48-LQFP（7x7） |
| 包裝： | 托盤 |
| 其它名稱： | 935274411151 SC16C752BIB48-S SC16C752BIB48-S-ND |
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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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相關代理商/技術參數 |
參數描述 |
|---|---|
| SC16C752BIB48-F | 功能描述:UART 接口集成電路 16CB 2.5V-5V 2CH UART 64B FIFO 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 |
| SC16C752BIB48-S | 功能描述:UART 接口集成電路 16CB 2.5V-5V 2CH UART 64B FIFO 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 |
| SC16C752BIBS | 功能描述:UART 接口集成電路 16CB 2.5V-5V 2CH UART 64B FIFO 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 |
| SC16C752BIBS,128 | 功能描述:UART 接口集成電路 16CB 2.5V-5V 2CH 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 |
| SC16C752BIBS,151 | 功能描述:UART 接口集成電路 2CH. UART 64B FIFO 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 |
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