- 您现在的位置：买卖IC网 > PDF目录69306 > R5F212BASDFA 16-BIT, FLASH, 20 MHz, RISC MICROCONTROLLER, PQFP48 PDF资料下载
参数资料
| 型号： | R5F212BASDFA |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 16-BIT, FLASH, 20 MHz, RISC MICROCONTROLLER, PQFP48 |
| 封装： | 14 X 14 MM, 0.80 MM PITCH, PLASTIC, LQFP-48 |
| 文件页数： | 14/138页 |
| 文件大小： | 492K |
| 代理商： | R5F212BASDFA |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页当前第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页第123页第124页第125页第126页第127页第128页第129页第130页第131页第132页第133页第134页第135页第136页第137页第138页
199
4317K–AVR–03/2013
AT90PWM2/3/2B/3B
Note:
1. The example code assumes that the part specific header file is included.
For I/O Registers located in extended I/O map, “IN”, “OUT”, “SBIS”, “SBIC”, “CBI”, and “SBI”
instructions must be replaced with instructions that allow access to extended I/O. Typically
“LDS” and “STS” combined with “SBRS”, “SBRC”, “SBR”, and “CBR”.
18.8
Asynchronous Data Reception
The USART includes a clock recovery and a data recovery unit for handling asynchronous data
reception. The clock recovery logic is used for synchronizing the internally generated baud rate
clock to the incoming asynchronous serial frames at the RxD pin. The data recovery logic sam-
ples and low pass filters each incoming bit, thereby improving the noise immunity of the
Receiver. The asynchronous reception operational range depends on the accuracy of the inter-
nal baud rate clock, the rate of the incoming frames, and the frame size in number of bits.
18.8.1
Asynchronous Clock Recovery
The clock recovery logic synchronizes internal clock to the incoming serial frames. Figure 18-6
illustrates the sampling process of the start bit of an incoming frame. The sample rate is 16 times
the baud rate for Normal mode, and eight times the baud rate for Double Speed mode. The hor-
izontal arrows illustrate the synchronization variation due to the sampling process. Note the
larger time variation when using the Double Speed mode (U2X = 1) of operation. Samples
denoted zero are samples done when the RxD line is idle (i.e., no communication activity).
Figure 18-6. Start Bit Sampling
When the clock recovery logic detects a high (idle) to low (start) transition on the RxD line, the
start bit detection sequence is initiated. Let sample 1 denote the first zero-sample as shown in
the figure. The clock recovery logic then uses samples 8, 9, and 10 for Normal mode, and sam-
ples 4, 5, and 6 for Double Speed mode (indicated with sample numbers inside boxes on the
TABLE 2.
Assembly Code Example(1)
USART_Flush:
sbis
UCSRA, RXC0
ret
lds
r16, UDR
rjmp
USART_Flush
C Code Example
(1)
void
USART_Flush( void )
{
unsigned char
dummy;
while
( UCSRA & (1<<RXC0) ) dummy = UDR;
}
12
34
56
7
8
9
10
11
12
13
14
15
16
12
START
IDLE
0
BIT 0
3
123
4
5
678
12
0
RxDn
Sample
(U2Xn = 0)
Sample
(U2Xn = 1)
相关PDF资料 |
PDF描述 |
|---|---|
| R5F212BASDFP | 16-BIT, FLASH, 20 MHz, RISC MICROCONTROLLER, PQFP48 |
| R5F212BASNFA | 16-BIT, FLASH, 20 MHz, RISC MICROCONTROLLER, PQFP48 |
| R5F212ACSDFP | 16-BIT, FLASH, 20 MHz, RISC MICROCONTROLLER, PQFP48 |
| R5F212BCSNFP | 16-BIT, FLASH, 20 MHz, RISC MICROCONTROLLER, PQFP48 |
| R5F212BASNFP | 16-BIT, FLASH, 20 MHz, RISC MICROCONTROLLER, PQFP48 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| R5F212BASDFA#U0 | 制造商:Renesas Electronics Corporation 功能描述:IC MCU 16BIT 96KB FLASH 64LQFP |
| R5F212BASDFA#V0 | 功能描述:IC R8C/2B MCU FLASH 64LQFP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:R8C/2x/2B 标准包装:250 系列:80C 核心处理器:8051 芯体尺寸:8-位 速度:16MHz 连通性:EBI/EMI，I²C，UART/USART 外围设备:POR，PWM，WDT 输入/输出数:40 程序存储器容量:- 程序存储器类型:ROMless EEPROM 大小:- RAM 容量:256 x 8 电压 - 电源 (Vcc/Vdd):4.5 V ~ 5.5 V 数据转换器:A/D 8x10b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:68-LCC（J 形引线） 包装:带卷 (TR) |
| R5F212BASDFA#V2 | 制造商:Renesas Electronics Corporation 功能描述:R8C/2B 96+2/7 64LQFP 14X14 -40 TO +85 - Trays 制造商:Renesas Electronics Corporation 功能描述:IC MCU 16BIT 96KB FLASH 64LQFP |
| R5F212BASDFP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:MCU |
| R5F212BASDFP#U0 | 制造商:Renesas Electronics Corporation 功能描述:MCU 16-Bit R8C CISC 96KB Flash 2.5V/3.3V/5V 64-Pin LQFP 制造商:Renesas Electronics Corporation 功能描述:MCU 16-bit R8C CISC 96KB Flash 2.5V/3.3V/5V 64-Pin LQFP |
发布紧急采购，3分钟左右您将得到回复。