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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)： | 36/99頁 |
| 文件大?。?/td> | 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
36 of 99
NXP Semiconductors
LPC2939
ARM9 microcontroller with CAN, LIN, and USB
6.13.4.2
Clock description
The UART modules are clocked by two different clocks; CLK_SYS_PESS and
CLK_UARTx (x = 0 to 1), see
Section 6.7.2
. Note that each UART has its own
CLK_UARTx branch clock for power management. The frequency of all CLK_UARTx
clocks is identical since they are derived from the same base clock BASE_CLK_UART.
The register interface towards the system bus is clocked by CLK_SYS_PESS. The baud
generator is clocked by the CLK_UARTx.
6.13.5
Serial peripheral interface (SPI)
The LPC2939 contains three Serial Peripheral Interface modules (SPIs) to allow
synchronous serial communication with slave or master peripherals.
The key features are:
Master or slave operation
Each SPI supports up to four slaves in sequential multi-slave operation
Supports timer-triggered operation
Programmable clock bit rate and prescale based on SPI source clock
(BASE_SPI_CLK), independent of system clock
Separate transmit and receive FIFO memory buffers; 16 bits wide, 32 locations deep
Programmable choice of interface operation: Motorola SPI or Texas Instruments
Synchronous Serial Interfaces
Programmable data-frame size from 4 to 16 bits
Independent masking of transmit FIFO, receive FIFO and receive overrun interrupts
Serial clock-rate master mode: fserial_clk
f
clk(SPI)
/ 2
Serial clock-rate slave mode: fserial_clk = f
clk(SPI)
/ 4
Internal loopback test mode
The SPI module can operate in:
Master mode:
–
Normal transmission mode
–
Sequential slave mode
Slave mode
6.13.5.1
Functional description
The SPI module is a master or slave interface for synchronous serial communication with
peripheral devices that have either Motorola SPI or Texas Instruments Synchronous
Serial Interfaces.
The SPI module performs serial-to-parallel conversion on data received from a peripheral
device. The transmit and receive paths are buffered with FIFO memories (16 bits wide
32 words deep). Serial data is transmitted on pins SDOx and received on pins SDIx.
The SPI module includes a programmable bit-rate clock divider and prescaler to generate
the SPI serial clock from the input clock CLK_SPIx.
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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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