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參數(shù)資料
| 型號： | LPC2939FBD208 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | ARM9 microcontroller with CAN, LIN, and USB |
| 中文描述： | 32-BIT, FLASH, 125 MHz, RISC MICROCONTROLLER, PQFP208 |
| 封裝： | 28 X 28 MM, 1.40 MM HEIGHT, PLASTIC, SOT-459, MS-026, LQFP-208 |
| 文件頁數(shù)： | 35/99頁 |
| 文件大小： | 1945K |
| 代理商： | LPC2939FBD208 |
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LPC2939_3
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 03 — 7 April 2010
35 of 99
NXP Semiconductors
LPC2939
ARM9 microcontroller with CAN, LIN, and USB
6.13.3.2
Clock description
The timer modules are clocked by two different clocks; CLK_SYS_PESS and CLK_TMRx
(x = 0 to 3), see
Section 6.7.2
. Note that each timer has its own CLK_TMRx branch clock
for power management. The frequency of all these clocks is identical as they are derived
from the same base clock BASE_CLK_TMR. The register interface towards the system
bus is clocked by CLK_SYS_PESS. The timer and prescale counters are clocked by
CLK_TMRx.
6.13.4
UARTs
The LPC2939 contains two identical UARTs located at different peripheral base
addresses. The key features are:
16-byte receive and transmit FIFOs
Register locations conform to 550 industry standard
Receiver FIFO trigger points at 1 byte, 4 bytes, 8 bytes and 14 bytes
Built-in baud rate generator
Support for RS-485/9-bit mode allows both software address detection and automatic
address detection using 9-bit mode
Both UARTs equipped with standard modem interface signals. This module also
provides full support for hardware flow control (auto-CTS/RTS)
The UART is commonly used to implement a serial interface such as RS232. The
LPC2939 contains two industry-standard 550 UARTs with 16-byte transmit and receive
FIFOs, but they can also be put into 450 mode without FIFOs.
Remark:
The LIN controller can be configured to provide two additional standard UART
interfaces (see
Section 6.14.2
).
6.13.4.1
Pin description
The UART pins are combined with other functions on the port pins of the LPC2939.
Table 17
shows the UART pins (x runs from 0 to 1).
Table 17.
Symbol
UARTx TXD
UARTx RXD
UARTx CTS
UARTx DCD
UARTx DSR
UARTx DTR
UART pins
Pin name
TXDx
RXDx
CTSx
DCDx
DSRx
DTRx
Direction
OUT
IN
IN
IN
IN
OUT
Description
UART channel x transmit data output
UART channel x receive data input
UART channel x Clear To Send (modem)
UART channel x Data Carrier Detect (modem)
UART channel x Data Set Ready (modem)
UART channel x Data Terminal Ready
(modem)
UART Ring Indicator (modem)
UART Request To Send (modem)
UART channel x user designated output 1
UART channel x user designated output 2
UARTx RI
UARTx RTS
UARTx OUT1
UARTx OUT2
RIx
RTSx
UxOUT1
UxOUT2
IN
OUT
OUT
OUT
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| LPC2939FBD208,551 | 功能描述:ARM微控制器 - MCU IC ARM9 MCU FLASH 768KB RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 處理器系列:STM32F373xx 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:72 MHz 程序存儲器大小:256 KB 數(shù)據(jù) RAM 大小:32 KB 片上 ADC:Yes 工作電源電壓:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:LQFP-48 安裝風(fēng)格:SMD/SMT |
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