參數(shù)資料
型號(hào)： ADUC836BCPZ
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 57/80頁(yè)
文件大?。?/td> 0K
描述： IC MCU 62K FLASH ADC/DAC 56LFCSP
標(biāo)準(zhǔn)包裝： 1
系列： MicroConverter® ADuC8xx
核心處理器： 8052
芯體尺寸： 8-位
速度： 12.58MHz
連通性： EBI/EMI，I²C，SPI，UART/USART
外圍設(shè)備： POR，PSM，PWM，溫度傳感器，WDT
輸入/輸出數(shù)： 34
程序存儲(chǔ)器容量： 62KB（62K x 8）
程序存儲(chǔ)器類型： 閃存
EEPROM 大小： 4K x 8
RAM 容量： 2.25K x 8
電壓 - 電源 (Vcc/Vdd)： 2.7 V ~ 5.25 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 7x16b; D/A 1x12b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 56-VFQFN 裸露焊盤，CSP
包裝： 托盤
ADuC836
–60–
ADuC836
–61–
BAUD RATE GENERATION USING TIMER 3
The high integer dividers in a UART block means that high
speed baud rates are not always possible using some particular
crystals, e.g., using a 12 MHz crystal, a baud rate of 115200 is
not possible.To address this problem, the ADuC836 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 bits to 393216
bits 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 dif-
ferent applications. A block diagram of Timer 3 is shown in
Figure 57.
(1 + T3FD/64)
2
T3 RX/TX
CLOCK
CORE
CLK*
T3EN
RX
CLOCK
TX CLOCK
TIMER 1/TIMER 2
RX CLOCK (FIG 44)
FRACTIONAL
DIVIDER
0
1
TIMER 1/TIMER 2
TX CLOCK (FIG 44)
16
2DIV
*THE CORE CLOCK IS THE OUTPUT OF THE PLL (SEE THE ON-CHIP PLL SECTION)
Figure 57. 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 XXXIII. T3CON SFR Bit Designations
Bit Name
Description
7
T3EN
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.
6
–––
Reserved for Future Use
5
–––
Reserved for Future Use
4
–––
Reserved for Future Use
3
–––
Reserved for Future Use
2
DIV2
Binary Divider Factor
1
DIV1
DIV2 DIV1 DIV0 Bin Divider
0
DIV0
0
1
0
1
2
0
1
0
4
0
1
8
1
0
16
1
0
1
32
1
0
64
1
128
The appropriate value to write to the DIV2-1-0 bits can be cal-
culated using the following formula where fCORE is the output of
the PLL, as described in the On-Chip PLL section. Note that the
DIV value must be rounded down.
DIV
f
Baud Rate
CORE
=
×
( )
log
32
2
T3FD is the fractional divider ratio required to achieve the
required baud rate.We can calculate the appropriate value for
T3FD using the following formula. Note that the T3FD should
be rounded to the nearest integer.
T FD
f
Baud Rate
CORE
DIV
3
2
64
=
×
Once the values for DIV and T3FD are calculated, the actual
baud rate can be calculated using the following formula:
Actual Baud Rate
f
T FD
CORE
DIV
=
×
+
(
)
2
3
64
For a baud rate of 115200 while operating from the maximum
core frequency (CD = 0), we have:
DIV
T FD
Dh
=
×
(
)
=
×
(
)
×
(
) =
=
log
/
/ log
.
12582912 32 115200
2 1 77 1
3
2 12 582912
2
115200
64 45 22 2
1
Therefore, the actual baud rate is 115439 bits.
Table XXXIV. Commonly Used Baud Rates Using Timer 3
Ideal
%
Baud
CD
DIV
T3CON
T3FD
Error
230400
0
80H
2DH
0.2
115200
0
1
81H
2DH
0.2
115200
1
0
80H
2DH
0.2
57600
0
2
82H
2DH
0.2
57600
1
81H
2DH
0.2
57600
2
0
80H
2DH
0.2
38400
0
3
83H
12H
0.1
38400
1
2
82H
12H
0.1
38400
2
1
81H
12H
0.1
38400
3
0
80H
12H
0.1
19200
0
4
84H
12H
0.1
19200
1
3
83H
12H
0.1
19200
2
82H
12H
0.1
19200
3
1
81H
12H
0.1
19200
4
0
80H
12H
0.1
9600
0
5
85H
12H
0.1
9600
1
4
84H
12H
0.1
9600
2
3
83H
12H
0.1
9600
3
2
82H
12H
0.1
9600
4
1
81H
12H
0.1
9600
5
0
80H
12H
0.1
38400
0
3
83H
12H
0.1
REV. A
相關(guān)PDF資料
PDF描述
ADUC843BSZ62-5 IC ADC 12BIT W/FLASH MCU 52-MQFP
ADUC845BCPZ62-5 IC FLASH MCU W/24BIT ADC 56-CSP
ADUC847BCPZ62-5 IC MCU FLASH W/24BIT ADC 56-CSP
ADV202BBCZ-135 IC CODEC VIDEO 135MHZ 144CSPBGA
ADV212BBCZ-115 IC CODEC VID JPEG 2000 121CSPBGA
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADUC836BCPZ-REEL 功能描述:IC MCU 62K FLASH ADC/DAC 56LFCSP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:MicroConverter® ADuC8xx 標(biāo)準(zhǔn)包裝:38 系列:Encore!® XP® 核心處理器:eZ8 芯體尺寸:8-位 速度:5MHz 連通性:IrDA，UART/USART 外圍設(shè)備:欠壓檢測(cè)/復(fù)位，LED，POR，PWM，WDT 輸入/輸出數(shù):16 程序存儲(chǔ)器容量:4KB（4K x 8） 程序存儲(chǔ)器類型:閃存 EEPROM 大小:- RAM 容量:1K x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:- 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 105°C 封裝/外殼:20-SOIC（0.295"，7.50mm 寬） 包裝:管件 其它名稱:269-4116Z8F0413SH005EG-ND
ADUC836BS 制造商:Analog Devices 功能描述:MCU 8-bit ADuC8xx 8052 CISC 62KB Flash 3.3V/5V 52-Pin MQFP 制造商:Analog Devices 功能描述:8BIT MCU +16BIT DUAL ADC MQFP52
ADUC836BS 制造商:Analog Devices 功能描述:IC SEMICONDUCTOR ((NS))
ADUC836BSZ 功能描述:IC ADC DUAL 16BIT W/MCU 52-MQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:MicroConverter® ADuC8xx 標(biāo)準(zhǔn)包裝:250 系列:56F8xxx 核心處理器:56800E 芯體尺寸:16-位 速度:60MHz 連通性:CAN，SCI，SPI 外圍設(shè)備:POR，PWM，溫度傳感器，WDT 輸入/輸出數(shù):21 程序存儲(chǔ)器容量:40KB（20K x 16） 程序存儲(chǔ)器類型:閃存 EEPROM 大小:- RAM 容量:6K x 16 電壓 - 電源 (Vcc/Vdd):2.25 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 6x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:48-LQFP 包裝:托盤 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323
ADUC841 制造商:AD 制造商全稱:Analog Devices 功能描述:MicroConverter 12-Bit ADCs and DACs with Embedded High Speed 62-kB Flash MCU
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*