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| 型号： | EVAL-ADUC841QSZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 63/88页 |
| 文件大小： | 0K |
| 描述： | KIT DEV FOR ADUC841 QUICK START |
| 产品培训模块： | Process Control |
| 标准包装： | 1 |
| 系列： | QuickStart™ 套件 |
| 类型： | MCU |
| 适用于相关产品： | ADuC841 |
| 所含物品： | 评估板、电源、缆线、软件和说明文档 |
| 产品目录页面： | 739 (CN2011-ZH PDF) |
| 相关产品： | ADUC841BCPZ62-3-ND - IC MCU 62K FLASH ADC/DAC 56LFCSP ADUC841BCPZ62-5-ND - IC MCU 62K FLASH ADC/DAC 56LFCSP ADUC841BCPZ8-3-ND - IC MCU 8KB FLASH ADC/DAC 56LFCSP ADUC841BCPZ8-5-ND - IC MCU 8KB FLASH ADC/DAC 56LFCSP ADUC841BSZ62-5-ND - IC ADC/DAC 12BIT W/MCU 52-MQFP ADUC841BSZ62-3-ND - IC ADC/DAC 12BIT W/MCU 52-MQFP |
| 其它名称： | EVAL-ADUC841QS EVAL-ADUC841QS-ND |
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ADuC841/ADuC842/ADuC843
Rev. 0 | Page 66 of 88
Mode 0: 8-Bit Shift Register Mode
Mode 0 is selected by clearing both the SM0 and SM1 bits in the
SFR SCON. Serial data enters and exits through RxD. TxD out-
puts the shift clock. Eight data bits are transmitted or received.
Transmission is initiated by any instruction that writes to SBUF.
The data is shifted out of the RxD line. The 8 bits are transmitted
with the least significant bit (LSB) first.
Reception is initiated when the receive enable bit (REN) is 1
and the receive interrupt bit (RI) is 0. When RI is cleared, the
data is clocked into the RxD line, and the clock pulses are
output from the TxD line.
Mode 1: 8-Bit UART, Variable Baud Rate
Mode 1 is selected by clearing SM0 and setting SM1. Each data
byte (LSB first) is preceded by a start bit (0) and followed by a
stop bit (1). Therefore, 10 bits are transmitted on TxD or are
received on RxD. The baud rate is set by the Timer 1 or Timer 2
overflow rate, or a combination of the two (one for transmission
and the other for reception).
Transmission is initiated by writing to SBUF. The write to SBUF
signal also loads a 1 (stop bit) into the 9th bit position of the
transmit shift register. The data is output bit by bit until the stop
bit appears on TxD and the transmit interrupt flag (TI) is
automatically set, as shown in Figure 72.
TxD
TI
(SCON.1)
START
BIT
D0
D1
D2
D3
D4
D5
D6
D7
STOP BIT
SET INTERRUPT
I.E., READY FOR MORE DATA
03260-0-072
Figure 72. UART Serial Port Transmission, Mode 1
Reception is initiated when a 1-to-0 transition is detected on
RxD. Assuming a valid start bit is detected, character reception
continues. The start bit is skipped and the 8 data bits are
clocked into the serial port shift register. When all 8 bits have
been clocked in, the following events occur:
The 8 bits in the receive shift register are latched into SBUF.
The 9th bit (stop bit) is clocked into RB8 in SCON.
The receiver interrupt flag (RI) is set.
This is the case if, and only if, all of the following conditions are
met at the time the final shift pulse is generated:
RI = 0
Either SM2 = 0 or SM2 = 1
The received stop bit = 1
If any of these conditions is not met, the received frame is
irretrievably lost, and RI is not set.
Mode 2: 9-Bit UART with Fixed Baud Rate
Mode 2 is selected by setting SM0 and clearing SM1. In this
mode, the UART operates in 9-bit mode with a fixed baud rate.
The baud rate is fixed at Core_Clk/32 by default, although by
setting the SMOD bit in PCON, the frequency can be doubled
to Core_Clk/16. Eleven bits are transmitted or received: a start
bit (0), 8 data bits, a programmable 9th bit, and a stop bit (1).
The 9th bit is most often used as a parity bit, although it can be
used for anything, including a 9th data bit if required.
To transmit, the 8 data bits must be written into SBUF. The 9th
bit must be written to TB8 in SCON. When transmission is
initiated, the 8 data bits (from SBUF) are loaded onto the
transmit shift register (LSB first). The contents of TB8 are loaded
into the 9th bit position of the transmit shift register. The
transmission starts at the next valid baud rate clock. The TI flag
is set as soon as the stop bit appears on TxD.
Reception for Mode 2 is similar to that of Mode 1. The 8 data
bytes are input at RxD (LSB first) and loaded onto the receive
shift register. When all 8 bits have been clocked in, the following
events occur:
The 8 bits in the receive shift register are latched into SBUF.
The 9th data bit is latched into RB8 in SCON.
The receiver interrupt flag (RI) is set.
This is the case if, and only if, all of the following conditions are
met at the time the final shift pulse is generated:
RI = 0
Either SM2 = 0 or SM2 = 1
The received stop bit = 1
If any of these conditions is not met, the received frame is
irretrievably lost, and RI is not set.
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| EVAL-ADUC842QS | 功能描述:KIT DEV FOR ADUC842 QUICK START RoHS:否 类别:编程器，开发系统 >> 通用嵌入式开发板和套件（MCU、DSP、FPGA、CPLD等） 系列:QuickStart™ 套件 产品培训模块:Blackfin® Processor Core Architecture Overview Blackfin® Device Drivers Blackfin® Optimizations for Performance and Power Consumption Blackfin® System Services 特色产品:Blackfin? BF50x Series Processors 标准包装:1 系列:Blackfin® 类型:DSP 适用于相关产品:ADSP-BF548 所含物品:板，软件，4x4 键盘，光学拨轮，QVGA 触摸屏 LCD 和 40G 硬盘 配用:ADZS-BFBLUET-EZEXT-ND - EZ-EXTENDER DAUGHTERBOARDADZS-BFLLCD-EZEXT-ND - BOARD EXT LANDSCAP LCD INTERFACE 相关产品:ADSP-BF542BBCZ-4A-ND - IC DSP 16BIT 400MHZ 400CSBGAADSP-BF544MBBCZ-5M-ND - IC DSP 16BIT 533MHZ MDDR 400CBGAADSP-BF542MBBCZ-5M-ND - IC DSP 16BIT 533MHZ MDDR 400CBGAADSP-BF542KBCZ-6A-ND - IC DSP 16BIT 600MHZ 400CSBGAADSP-BF547MBBCZ-5M-ND - IC DSP 16BIT 533MHZ MDDR 400CBGAADSP-BF548BBCZ-5A-ND - IC DSP 16BIT 533MHZ 400CSBGAADSP-BF547BBCZ-5A-ND - IC DSP 16BIT 533MHZ 400CSBGAADSP-BF544BBCZ-5A-ND - IC DSP 16BIT 533MHZ 400CSBGAADSP-BF542BBCZ-5A-ND - IC DSP 16BIT 533MHZ 400CSBGA |
| EVAL-ADUC842QS1 | 制造商:AD 制造商全称:Analog Devices 功能描述:MicroConverter 12-Bit ADCs and DACs with Embedded High Speed 62-kB Flash MCU |
| EVAL-ADUC842QSP1 | 制造商:AD 制造商全称:Analog Devices 功能描述:MicroConverter 12-Bit ADCs and DACs with Embedded High Speed 62-kB Flash MCU |
| EVAL-ADUC842QSP2 | 制造商:AD 制造商全称:Analog Devices 功能描述:MicroConverter 12-Bit ADCs and DACs with Embedded High Speed 62-kB Flash MCU |
| EVAL-ADUC842QSPZ | 功能描述:KIT DEV QUICK START ADUC842 RoHS:是 类别:编程器，开发系统 >> 通用嵌入式开发板和套件（MCU、DSP、FPGA、CPLD等） 系列:QuickStart™ PLUS 套件 标准包装:1 系列:PICDEM™ 类型:MCU 适用于相关产品:PIC10F206，PIC16F690，PIC16F819 所含物品:板，线缆，元件，CD，PICkit 编程器 产品目录页面:659 (CN2011-ZH PDF) |
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