- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄374039 > ADUC843BS62-5 (ANALOG DEVICES INC) MicroConverter 12-Bit ADCs and DACs with Embedded High Speed 62-kB Flash MCU PDF資料下載
參數(shù)資料
| 型號： | ADUC843BS62-5 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | MicroConverter 12-Bit ADCs and DACs with Embedded High Speed 62-kB Flash MCU |
| 中文描述： | 8-BIT, FLASH, 16.78 MHz, MICROCONTROLLER, PQFP52 |
| 封裝： | PLASTIC, MO-112AC1, MQFP-52 |
| 文件頁數(shù)： | 68/88頁 |
| 文件大?。?/td> | 903K |
| 代理商： | ADUC843BS62-5 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁當前第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁
ADuC841/ADuC842/ADuC843
Timer 3 Generated Baud Rates
The high integer dividers in a UART block mean that high
speed baud rates are not always possible using some particular
crystals. For example, using a 12 MHz crystal, a baud rate of
115200 is not possible. To address this problem, the part has
added a dedicated baud rate timer (Timer 3) specifically for
generating highly accurate baud rates. Timer 3 can be used
instead of Timer 1 or Timer 2 for generating very accurate high
speed UART baud rates including 115200 and 230400. Timer 3
also allows a much wider range of baud rates to be obtained. In
fact, every desired bit rate from 12 bit/s to 393216 bit/s can be
generated to within an error of ±0.8%. Timer 3 also frees up the
other three timers, allowing them to be used for different
applications. A block diagram of Timer 3 is shown in Figure 74.
Rev. 0 | Page 68 of 88
(1 + T3FD/64)
2
T3 RX/TX
CLOCK
CORE
CLK
T3EN
RX CLOCK
TX CLOCK
TIMER 1/TIMER 2
RX CLOCK
FRACTIONAL
DIVIDER
0
0
1
1
TIMER 1/TIMER 2
TX CLOCK
16
2
DIV
0
Figure 74. Timer 3, UART Baud Rates
Two SFRs (T3CON and T3FD) are used to control Timer 3.
T3CON is the baud rate control SFR, allowing Timer 3 to be
used to set up the UART baud rate, and setting up the binary
divider (DIV).
Table 33. T3CON SFR Bit Designations
Bit No.
Name
7
T3BAUDEN
The appropriate value to write to the DIV2-1-0 bits can be
calculated using the following formula where
f
CORE
is defined in
PLLCON SFR. Note that the DIV value must be rounded down.
( )
2
log
16
log
×
=
Rate
Baud
f
DIV
CORE
T3FD is the fractional divider ratio required to achieve the
required baud rate. The appropriate value for T3FD can be
calculated with the following formula:
64
2
2
3
1
×
×
=
Rate
Baud
f
FD
T
DIV
CORE
Note that
T3FD
should be rounded to the nearest integer. Once
the values for
DIV
and
T3FD
are calculated, the actual baud rate
can be calculated with the following formula:
(
)
64
3
2
2
×
1
+
×
=
FD
T
f
Rate
Baud
Actual
DIV
CORE
For example, to get a baud rate of 115200 while operating at
16.7 MHz, i.e., CD = 0
(
(
(
FD
T
/
16777216
2
3
×
=
Therefore, the actual baud rate is 114912 bit/s.
)
)
)
(
)
H
DIV
09
9
64
115200
2
3
18
=
.
2
log
/
115200
×
16
/
16777216
log
2
=
=
=
×
=
Description
T3UARTBAUD Enable.
Set to enable Timer 3 to generate the baud rate. When set, PCON.7, T2CON.4, and T2CON.5 are ignored.
Cleared to let the baud rate be generated as per a standard 8052.
Reserved.
Reserved.
Reserved.
Reserved.
Binary Divider Factor.
DIV2
DIV1
DIV0
Bin Divider
0
0
0
1
0
0
1
1
0
1
0
1
0
1
1
1
1
0
0
1
1
0
1
1
1
1
0
1
1
1
1
1
6
5
4
3
2
1
0
DIV2
DIV1
DIV0
相關PDF資料 |
PDF描述 |
|---|---|
| ADUC842 | CON, RTANG 68 POS |
| ADUC842BCP | 12- Bit ADCs and DACs with Embedded Hi-Speed 62KB FLASH MCU |
| ADUC842BS | 12- Bit ADCs and DACs with Embedded Hi-Speed 62KB FLASH MCU |
| ADUC844BS62-5 | MicroConverter, Dual 16-Bit/24-Bit ADCs with Embedded 62kB FLASH MCU |
| ADUC844BS62-3 | MicroConverter, Dual 16-Bit/24-Bit ADCs with Embedded 62kB FLASH MCU |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ADUC843BSZ62-3 | 功能描述:IC ADC 12BIT W/FLASH MCU 52-MQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:MicroConverter® ADuC8xx 標準包裝:250 系列:LPC11Uxx 核心處理器:ARM? Cortex?-M0 芯體尺寸:32-位 速度:50MHz 連通性:I²C，Microwire，SPI，SSI，SSP，UART/USART，USB 外圍設備:欠壓檢測/復位，POR，WDT 輸入/輸出數(shù):40 程序存儲器容量:96KB（96K x 8） 程序存儲器類型:閃存 EEPROM 大小:4K x 8 RAM 容量:10K x 8 電壓 - 電源 (Vcc/Vdd):1.8 V ~ 3.6 V 數(shù)據(jù)轉換器:A/D 8x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:48-LQFP 包裝:托盤 其它名稱:568-9587 |
| ADUC843BSZ62-5 | 功能描述:IC ADC 12BIT W/FLASH MCU 52-MQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:MicroConverter® ADuC8xx 標準包裝:60 系列:PSOC® 3 CY8C38xx 核心處理器:8051 芯體尺寸:8-位 速度:67MHz 連通性:EBI/EMI，I²C，LIN，SPI，UART/USART 外圍設備:電容感應，DMA，LCD，POR，PWM，WDT 輸入/輸出數(shù):25 程序存儲器容量:64KB（64K x 8） 程序存儲器類型:閃存 EEPROM 大小:2K x 8 RAM 容量:8K x 8 電壓 - 電源 (Vcc/Vdd):1.71 V ~ 5.5 V 數(shù)據(jù)轉換器:A/D 2x20b，D/A 4x8b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:48-VFQFN 裸露焊盤 包裝:托盤 |
| ADUC844 | 制造商:AD 制造商全稱:Analog Devices 功能描述:MicroConverter, Dual 16-Bit/24-Bit ADCs with Embedded 62kB FLASH MCU |
| ADUC844BCP32-3 | 制造商:AD 制造商全稱:Analog Devices 功能描述:MicroConverter, Dual 16-Bit/24-Bit ADCs with Embedded 62kB FLASH MCU |
| ADUC844BCP32-5 | 制造商:AD 制造商全稱:Analog Devices 功能描述:MicroConverter, Dual 16-Bit/24-Bit ADCs with Embedded 62kB FLASH MCU |
發(fā)布緊急采購，3分鐘左右您將得到回復。