20.6.3.2 Asynchronous Receiver If the USART is configured in an asynchronous ope" />
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鍨嬭櫉锛� ATUC128D4-AUR
寤犲晢锛� Atmel
鏂囦欢闋佹暩(sh霉)锛� 272/755闋�
鏂囦欢澶�?銆�?/td> 0K
鎻忚堪锛� IC MCU 32BIT 128KB FLASH 48TQFP
妯欐簴鍖呰锛� 2,500
绯诲垪锛� AVR®32 UC3 D
鏍稿績铏曠悊鍣細 AVR
鑺珨灏哄锛� 32-浣�
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绋嬪簭瀛樺劜鍣ㄥ閲忥細 128KB锛�128K x 8锛�
绋嬪簭瀛樺劜鍣ㄩ鍨嬶細 闁冨瓨
RAM 瀹归噺锛� 16K x 8
闆诲 - 闆绘簮 (Vcc/Vdd)锛� 1.65 V ~ 3.6 V
鏁�(sh霉)鎿�(j霉)杞�(zhu菐n)鎻涘櫒锛� A/D 6x10b
鎸暕鍣ㄥ瀷锛� 鍏�(n猫i)閮�
宸ヤ綔婧害锛� -40°C ~ 85°C
灏佽/澶栨锛� 48-TQFP
鍖呰锛� 甯跺嵎 (TR)
鍏跺畠鍚嶇ū锛� ATUC128D4-AUR-ND
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730闋�绗�731闋�绗�732闋�绗�733闋�绗�734闋�绗�735闋�绗�736闋�绗�737闋�绗�738闋�绗�739闋�绗�740闋�绗�741闋�绗�742闋�绗�743闋�绗�744闋�绗�745闋�绗�746闋�绗�747闋�绗�748闋�绗�749闋�绗�750闋�绗�751闋�绗�752闋�绗�753闋�绗�754闋�绗�755闋�
343
32133D鈥�11/2011
UC3D
Figure 20-4. Transmitter Status
20.6.3.2
Asynchronous Receiver
If the USART is configured in an asynchronous operating mode (MR.SYNC = 0), the receiver will
oversample the RXD input line by either 8 or 16 times the baud rate clock, as selected by the
Oversampling Mode bit (MR.OVER). If the line is zero for half a bit period (four or eight consecu-
tive samples, respectively), a start bit will be assumed, and the following 8th or 16th sample will
determine the logical value on the line, in effect resulting in bit values being determined at the
middle of the bit period.
The number of data bits, endianess, parity mode, and stop bits are selected by the same bits
and fields as for the transmitter (MR.CHRL, MODE9, MSBF, PAR, and NBSTOP). The synchro-
nization mechanism will only consider one stop bit, regardless of the used protocol, and when
the first stop bit has been sampled, the receiver will automatically begin looking for a new start
bit, enabling resynchronization even if there is a protocol miss-match. Figure 20-5 and Figure
20-6 illustrate start bit detection and character reception in asynchronous mode.
Figure 20-5. Asynchronous Start Bit Detection
D0
D1
D2
D3
D4
D5
D6
D7
TXD
Start
Bit
Parity
Bit
Stop
Bit
Baud Rate
Clock
Start
Bit
Write
THR
D0
D1
D2
D3
D4
D5
D6
D7
Parity
Bit
Stop
Bit
TXRDY
TXEMPTY
Sampling
Clock (x16)
RXD
Start
Detection
Sampling
Baud Rate
Clock
RXD
Start
Rejection
Sampling
12345678
12345670
1234
12345678
9
10111213141516
D0
Sampling
鐩搁棞PDF璩囨枡
PDF鎻忚堪
VI-B72-IW-F2 CONVERTER MOD DC/DC 15V 100W
V24C12H150B2 CONVERTER MOD DC/DC 12V 150W
VI-B71-IX-F3 CONVERTER MOD DC/DC 12V 75W
VI-B71-IX-F2 CONVERTER MOD DC/DC 12V 75W
VI-B71-IX-F1 CONVERTER MOD DC/DC 12V 75W
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ATUC128D4-Z1UR 鍔熻兘鎻忚堪:32浣嶅井鎺у埗鍣� - MCU UC3D4 128KB FL 85C RoHS:鍚� 鍒堕€犲晢:Texas Instruments 鏍稿績:C28x 铏曠悊鍣ㄧ郴鍒�:TMS320F28x 鏁�(sh霉)鎿�(j霉)绺界窔瀵害:32 bit 鏈€澶ф檪閻橀牷鐜�:90 MHz 绋嬪簭瀛樺劜鍣ㄥぇ灏�:64 KB 鏁�(sh霉)鎿�(j霉) RAM 澶у皬:26 KB 鐗囦笂 ADC:Yes 宸ヤ綔闆绘簮闆诲:2.97 V to 3.63 V 宸ヤ綔婧害鑼冨湇:- 40 C to + 105 C 灏佽 / 绠遍珨:LQFP-80 瀹夎棰ㄦ牸:SMD/SMT
ATUC128D4-Z1UT 鍔熻兘鎻忚堪:32浣嶅井鎺у埗鍣� - MCU UC3D4 128KB FL 85C RoHS:鍚� 鍒堕€犲晢:Texas Instruments 鏍稿績:C28x 铏曠悊鍣ㄧ郴鍒�:TMS320F28x 鏁�(sh霉)鎿�(j霉)绺界窔瀵害:32 bit 鏈€澶ф檪閻橀牷鐜�:90 MHz 绋嬪簭瀛樺劜鍣ㄥぇ灏�:64 KB 鏁�(sh霉)鎿�(j霉) RAM 澶у皬:26 KB 鐗囦笂 ADC:Yes 宸ヤ綔闆绘簮闆诲:2.97 V to 3.63 V 宸ヤ綔婧害鑼冨湇:- 40 C to + 105 C 灏佽 / 绠遍珨:LQFP-80 瀹夎棰ㄦ牸:SMD/SMT
ATUC128L3U-AUR 鍔熻兘鎻忚堪:32浣嶅井鎺у埗鍣� - MCU UC3L-128KB Flash 64QFP 85C green T&R RoHS:鍚� 鍒堕€犲晢:Texas Instruments 鏍稿績:C28x 铏曠悊鍣ㄧ郴鍒�:TMS320F28x 鏁�(sh霉)鎿�(j霉)绺界窔瀵害:32 bit 鏈€澶ф檪閻橀牷鐜�:90 MHz 绋嬪簭瀛樺劜鍣ㄥぇ灏�:64 KB 鏁�(sh霉)鎿�(j霉) RAM 澶у皬:26 KB 鐗囦笂 ADC:Yes 宸ヤ綔闆绘簮闆诲:2.97 V to 3.63 V 宸ヤ綔婧害鑼冨湇:- 40 C to + 105 C 灏佽 / 绠遍珨:LQFP-80 瀹夎棰ㄦ牸:SMD/SMT
ATUC128L3U-AUT 鍔熻兘鎻忚堪:32浣嶅井鎺у埗鍣� - MCU UC3L-128KB Flash 64QFP 85C green TRAY RoHS:鍚� 鍒堕€犲晢:Texas Instruments 鏍稿績:C28x 铏曠悊鍣ㄧ郴鍒�:TMS320F28x 鏁�(sh霉)鎿�(j霉)绺界窔瀵害:32 bit 鏈€澶ф檪閻橀牷鐜�:90 MHz 绋嬪簭瀛樺劜鍣ㄥぇ灏�:64 KB 鏁�(sh霉)鎿�(j霉) RAM 澶у皬:26 KB 鐗囦笂 ADC:Yes 宸ヤ綔闆绘簮闆诲:2.97 V to 3.63 V 宸ヤ綔婧害鑼冨湇:- 40 C to + 105 C 灏佽 / 绠遍珨:LQFP-80 瀹夎棰ㄦ牸:SMD/SMT