參數(shù)資料
型號: ADUC7122BBCZ-RL
廠商: Analog Devices Inc
文件頁數(shù): 50/96頁
文件大?。?/td> 0K
描述: PRECISION ANALOG MCU I.C
標(biāo)準(zhǔn)包裝: 1
系列: MicroConverter® ADuC7xxx
核心處理器: ARM7
芯體尺寸: 16/32-位
速度: 41.78MHz
連通性: I²C,SPI,UART/USART
外圍設(shè)備: POR,PWM,WDT
輸入/輸出數(shù): 32
程序存儲器容量: 126KB(63K x 16)
程序存儲器類型: 閃存
RAM 容量: 8K x 8
電壓 - 電源 (Vcc/Vdd): 3 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 13x12b,D/A 12x12b
振蕩器型: 內(nèi)部
工作溫度: -10°C ~ 95°C
封裝/外殼: 108-LFBGA,CSPBGA
包裝: 標(biāo)準(zhǔn)包裝
其它名稱: ADUC7122BBCZ-RLDKR
ADuC7122
Rev. 0 | Page 54 of 96
UART SERIAL INTERFACE
The ADuC7122 features a 16450-compatible UART. The UART
is a full-duplex, universal, asynchronous receiver/transmitter. A
UART performs serial-to-parallel conversion on data characters
received from a peripheral device, and parallel-to-serial conver-
sion on data characters received from the ARM7TDMI. The
UART features a fractional divider that facilitates high accuracy
baud rate generation and a network addressable mode. The
UART functionality is available on the P1.0 and P1.1 pins of the
ADuC7122.
The serial communication adopts an asynchronous protocol
that supports various word length, stop bits, and parity genera-
tion options selectable in the configuration register.
BAUD RATE GENERATION
The ADuC7122 features two methods of generating the UART
baud rate: normal 450 UART baud rate generation and ADuC7122
fractional divider.
Normal 450 UART Baud Rate Generation
The baud rate is a divided version of the core clock using the
value in COMDIV0 and COMDIV1 MMRs (16-bit value, DL).
The standard baud rate generator formula is
DL
rate
Baud
2
16
MHz
78
.
41
(1)
Table 94 lists common baud rate values.
Table 94. Baud Rate Using the Standard Baud Rate Generator
Baud Rate
DL
Actual Baud Rate
% Error
9600
0x88
9600
0%
19,200
0x44
19,200
0%
115,200
0x0B
118,691
3%
ADuC7122 Fractional Divider
The fractional divider combined with the normal baud rate
generator allows the generating of a wider range of more
accurate baud rates.
/16DL
UART
FBEN
CORE
CLOCK
/2
/(M + N/2048)
0
87
55
-035
Figure 34. Baud Rate Generation Options
Calculation of the baud rate using fractional divider is as
follows:
)
2048
(
2
16
MHz
78
.
41
N
M
DL
Rate
Baud
(2)
2
16
MHz
78
.
41
2048
DL
Rate
Baud
N
M
For example, generation of 19,200 baud
2
67
16
200
,
19
MHz
78
.
41
2048
N
M
015
.
1
2048
N
M
where:
M = 1.
N = 0.015 × 2048 = 30.
2048
30
1
2
67
16
MHz
78
.
41
Rate
Baud
where Baud Rate = 19,219 bps.
UART REGISTER DEFINITION
The UART interface consists of the following ten registers:
COMTX: 8-bit transmit register
COMRX: 8-bit receive register
COMDIV0: divisor latch (low byte)
COMDIV1: divisor latch (high byte)
COMCON0: line control register
COMCON1: line control register
COMSTA0: line status register
COMIEN0: interrupt enable register
COMIID0: interrupt identification register
COMDIV2: 16-bit fractional baud divide register
COMTX, COMRX, and COMDIV0 share the same address
location. COMTX, COMRX, and COMIEN0 can be accessed
when Bit 7 in the COMCON0 register is cleared. COMDIVx
can be accessed when Bit 7 of COMCON0 is set
相關(guān)PDF資料
PDF描述
ADUC7126BSTZ126-RL IC MCU 16/32B 126KB FLASH 80LQFP
ADUC7129BSTZ126 IC DAS MCU ARM7 ADC/DDS 80-LQFP
ADUC812BSZ-REEL IC MCU FLASH 12BIT ADC 52MQFP
ADUC814BRU IC ADC 12BIT W/FLASH MCU 28TSSOP
ADUC816BCP IC MCU 8K FLASH ADC/DAC 56LFCSP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADUC7124 制造商:AD 制造商全稱:Analog Devices 功能描述:Precision Analog Microcontroller, 12-Bit Analog I/O, Large Memory, ARM7TDMI MCU with Enhanced IRQ Handler
ADUC7124BCPZ126 功能描述:IC DAS MCU ARM7 ADC/DDS 64LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:MicroConverter® ADuC7xxx 標(biāo)準(zhǔn)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(shè)備:欠壓檢測/復(fù)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(zhuǎn)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
ADUC7124BCPZ126-RL 功能描述:IC DAS MCU ARM7 ADC/DDS 64-LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:MicroConverter® ADuC7xxx 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/復(fù)位,LED,POR,PWM,WDT 輸入/輸出數(shù):16 程序存儲器容量:4KB(4K x 8) 程序存儲器類型: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
ADUC7126BSTZ126 功能描述:IC MCU 16/32B 126KB FLASH 80LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:MicroConverter® ADuC7xxx 標(biāo)準(zhǔn)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(shè)備:欠壓檢測/復(fù)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(zhuǎn)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
ADUC7126BSTZ126I 功能描述:IC MCU 16/32B 126KB FLASH 80LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:MicroConverter® ADuC7xxx 標(biāo)準(zhǔn)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(shè)備:欠壓檢測/復(fù)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(zhuǎn)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