Full Duplex, Three-wire Sy" />
鍙冩暩(sh霉)璩囨枡
鍨嬭櫉锛� ATMEGA48PA-MN
寤犲晢锛� Atmel
鏂囦欢闋佹暩(sh霉)锛� 118/448闋�
鏂囦欢澶�?銆�?/td> 0K
鎻忚堪锛� MCU AVR 4KB FLASH 20MHZ 28QFN
鐢�(ch菐n)鍝佸煿瑷撴ā濉婏細 megaAVR Introduction
妯欐簴鍖呰锛� 490
绯诲垪锛� AVR® ATmega
鏍稿績铏曠悊鍣細 AVR
鑺珨灏哄锛� 8-浣�
閫熷害锛� 20MHz
閫i€氭€э細 I²C锛孲PI锛孶ART/USART
澶栧湇瑷�(sh猫)鍌欙細 娆犲妾㈡脯/寰╀綅锛孭OR锛孭WM锛學DT
杓稿叆/杓稿嚭鏁�(sh霉)锛� 23
绋嬪簭瀛樺劜鍣ㄥ閲忥細 4KB锛�2K x 16锛�
绋嬪簭瀛樺劜鍣ㄩ鍨嬶細 闁冨瓨
EEPROM 澶�?銆�?/td> 256 x 8
RAM 瀹归噺锛� 512 x 8
闆诲 - 闆绘簮 (Vcc/Vdd)锛� 1.8 V ~ 5.5 V
鏁�(sh霉)鎿�(j霉)杞�(zhu菐n)鎻涘櫒锛� A/D 8x10b
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� 20-WFQFN 瑁搁湶鐒婄洡
鍖呰锛� 鎵樼洡
绗�1闋�绗�2闋�绗�3闋�绗�4闋�绗�5闋�绗�6闋�绗�7闋�绗�8闋�绗�9闋�绗�10闋�绗�11闋�绗�12闋�绗�13闋�绗�14闋�绗�15闋�绗�16闋�绗�17闋�绗�18闋�绗�19闋�绗�20闋�绗�21闋�绗�22闋�绗�23闋�绗�24闋�绗�25闋�绗�26闋�绗�27闋�绗�28闋�绗�29闋�绗�30闋�绗�31闋�绗�32闋�绗�33闋�绗�34闋�绗�35闋�绗�36闋�绗�37闋�绗�38闋�绗�39闋�绗�40闋�绗�41闋�绗�42闋�绗�43闋�绗�44闋�绗�45闋�绗�46闋�绗�47闋�绗�48闋�绗�49闋�绗�50闋�绗�51闋�绗�52闋�绗�53闋�绗�54闋�绗�55闋�绗�56闋�绗�57闋�绗�58闋�绗�59闋�绗�60闋�绗�61闋�绗�62闋�绗�63闋�绗�64闋�绗�65闋�绗�66闋�绗�67闋�绗�68闋�绗�69闋�绗�70闋�绗�71闋�绗�72闋�绗�73闋�绗�74闋�绗�75闋�绗�76闋�绗�77闋�绗�78闋�绗�79闋�绗�80闋�绗�81闋�绗�82闋�绗�83闋�绗�84闋�绗�85闋�绗�86闋�绗�87闋�绗�88闋�绗�89闋�绗�90闋�绗�91闋�绗�92闋�绗�93闋�绗�94闋�绗�95闋�绗�96闋�绗�97闋�绗�98闋�绗�99闋�绗�100闋�绗�101闋�绗�102闋�绗�103闋�绗�104闋�绗�105闋�绗�106闋�绗�107闋�绗�108闋�绗�109闋�绗�110闋�绗�111闋�绗�112闋�绗�113闋�绗�114闋�绗�115闋�绗�116闋�绗�117闋�鐣跺墠绗�118闋�绗�119闋�绗�120闋�绗�121闋�绗�122闋�绗�123闋�绗�124闋�绗�125闋�绗�126闋�绗�127闋�绗�128闋�绗�129闋�绗�130闋�绗�131闋�绗�132闋�绗�133闋�绗�134闋�绗�135闋�绗�136闋�绗�137闋�绗�138闋�绗�139闋�绗�140闋�绗�141闋�绗�142闋�绗�143闋�绗�144闋�绗�145闋�绗�146闋�绗�147闋�绗�148闋�绗�149闋�绗�150闋�绗�151闋�绗�152闋�绗�153闋�绗�154闋�绗�155闋�绗�156闋�绗�157闋�绗�158闋�绗�159闋�绗�160闋�绗�161闋�绗�162闋�绗�163闋�绗�164闋�绗�165闋�绗�166闋�绗�167闋�绗�168闋�绗�169闋�绗�170闋�绗�171闋�绗�172闋�绗�173闋�绗�174闋�绗�175闋�绗�176闋�绗�177闋�绗�178闋�绗�179闋�绗�180闋�绗�181闋�绗�182闋�绗�183闋�绗�184闋�绗�185闋�绗�186闋�绗�187闋�绗�188闋�绗�189闋�绗�190闋�绗�191闋�绗�192闋�绗�193闋�绗�194闋�绗�195闋�绗�196闋�绗�197闋�绗�198闋�绗�199闋�绗�200闋�绗�201闋�绗�202闋�绗�203闋�绗�204闋�绗�205闋�绗�206闋�绗�207闋�绗�208闋�绗�209闋�绗�210闋�绗�211闋�绗�212闋�绗�213闋�绗�214闋�绗�215闋�绗�216闋�绗�217闋�绗�218闋�绗�219闋�绗�220闋�绗�221闋�绗�222闋�绗�223闋�绗�224闋�绗�225闋�绗�226闋�绗�227闋�绗�228闋�绗�229闋�绗�230闋�绗�231闋�绗�232闋�绗�233闋�绗�234闋�绗�235闋�绗�236闋�绗�237闋�绗�238闋�绗�239闋�绗�240闋�绗�241闋�绗�242闋�绗�243闋�绗�244闋�绗�245闋�绗�246闋�绗�247闋�绗�248闋�绗�249闋�绗�250闋�绗�251闋�绗�252闋�绗�253闋�绗�254闋�绗�255闋�绗�256闋�绗�257闋�绗�258闋�绗�259闋�绗�260闋�绗�261闋�绗�262闋�绗�263闋�绗�264闋�绗�265闋�绗�266闋�绗�267闋�绗�268闋�绗�269闋�绗�270闋�绗�271闋�绗�272闋�绗�273闋�绗�274闋�绗�275闋�绗�276闋�绗�277闋�绗�278闋�绗�279闋�绗�280闋�绗�281闋�绗�282闋�绗�283闋�绗�284闋�绗�285闋�绗�286闋�绗�287闋�绗�288闋�绗�289闋�绗�290闋�绗�291闋�绗�292闋�绗�293闋�绗�294闋�绗�295闋�绗�296闋�绗�297闋�绗�298闋�绗�299闋�绗�300闋�绗�301闋�绗�302闋�绗�303闋�绗�304闋�绗�305闋�绗�306闋�绗�307闋�绗�308闋�绗�309闋�绗�310闋�绗�311闋�绗�312闋�绗�313闋�绗�314闋�绗�315闋�绗�316闋�绗�317闋�绗�318闋�绗�319闋�绗�320闋�绗�321闋�绗�322闋�绗�323闋�绗�324闋�绗�325闋�绗�326闋�绗�327闋�绗�328闋�绗�329闋�绗�330闋�绗�331闋�绗�332闋�绗�333闋�绗�334闋�绗�335闋�绗�336闋�绗�337闋�绗�338闋�绗�339闋�绗�340闋�绗�341闋�绗�342闋�绗�343闋�绗�344闋�绗�345闋�绗�346闋�绗�347闋�绗�348闋�绗�349闋�绗�350闋�绗�351闋�绗�352闋�绗�353闋�绗�354闋�绗�355闋�绗�356闋�绗�357闋�绗�358闋�绗�359闋�绗�360闋�绗�361闋�绗�362闋�绗�363闋�绗�364闋�绗�365闋�绗�366闋�绗�367闋�绗�368闋�绗�369闋�绗�370闋�绗�371闋�绗�372闋�绗�373闋�绗�374闋�绗�375闋�绗�376闋�绗�377闋�绗�378闋�绗�379闋�绗�380闋�绗�381闋�绗�382闋�绗�383闋�绗�384闋�绗�385闋�绗�386闋�绗�387闋�绗�388闋�绗�389闋�绗�390闋�绗�391闋�绗�392闋�绗�393闋�绗�394闋�绗�395闋�绗�396闋�绗�397闋�绗�398闋�绗�399闋�绗�400闋�绗�401闋�绗�402闋�绗�403闋�绗�404闋�绗�405闋�绗�406闋�绗�407闋�绗�408闋�绗�409闋�绗�410闋�绗�411闋�绗�412闋�绗�413闋�绗�414闋�绗�415闋�绗�416闋�绗�417闋�绗�418闋�绗�419闋�绗�420闋�绗�421闋�绗�422闋�绗�423闋�绗�424闋�绗�425闋�绗�426闋�绗�427闋�绗�428闋�绗�429闋�绗�430闋�绗�431闋�绗�432闋�绗�433闋�绗�434闋�绗�435闋�绗�436闋�绗�437闋�绗�438闋�绗�439闋�绗�440闋�绗�441闋�绗�442闋�绗�443闋�绗�444闋�绗�445闋�绗�446闋�绗�447闋�绗�448闋�
204
8161D鈥揂VR鈥�10/09
ATmega48PA/88PA/168PA/328P
20. USART in SPI Mode
20.1
Features
Full Duplex, Three-wire Synchronous Data Transfer
Master Operation
Supports all four SPI Modes of Operation (Mode 0, 1, 2, and 3)
LSB First or MSB First Data Transfer (Configurable Data Order)
Queued Operation (Double Buffered)
High Resolution Baud Rate Generator
High Speed Operation (f
XCKmax = fCK/2)
Flexible Interrupt Generation
20.2
Overview
The Universal Synchronous and Asynchronous serial Receiver and Transmitter (USART) can be
set to a master SPI compliant mode of operation.
Setting both UMSELn1:0 bits to one enables the USART in MSPIM logic. In this mode of opera-
tion the SPI master control logic takes direct control over the USART resources. These
resources include the transmitter and receiver shift register and buffers, and the baud rate gen-
erator. The parity generator and checker, the data and clock recovery logic, and the RX and TX
control logic is disabled. The USART RX and TX control logic is replaced by a common SPI
transfer control logic. However, the pin control logic and interrupt generation logic is identical in
both modes of operation.
The I/O register locations are the same in both modes. However, some of the functionality of the
control registers changes when using MSPIM.
20.3
Clock Generation
The Clock Generation logic generates the base clock for the Transmitter and Receiver. For
USART MSPIM mode of operation only internal clock generation (i.e. master operation) is sup-
ported. The Data Direction Register for the XCKn pin (DDR_XCKn) must therefore be set to one
(i.e. as output) for the USART in MSPIM to operate correctly. Preferably the DDR_XCKn should
be set up before the USART in MSPIM is enabled (i.e. TXENn and RXENn bit set to one).
The internal clock generation used in MSPIM mode is identical to the USART synchronous mas-
ter mode. The baud rate or UBRRn setting can therefore be calculated using the same
equations, see Table 20-1:
鐩搁棞(gu膩n)PDF璩囨枡
PDF鎻忚堪
AT89LP2052-20PU IC 8051 MCU FLASH 2K 20DIP
AT89LP52-20JU IC MCU 8051 8K FLASH SPI 44PLCC
AT89S4051-24PU MCU 8051 4K FLASH 24MHZ 20-PDIP
AT89LP2052-20SU IC 8051 MCU FLASH 2K 20SOIC
AT89LP52-20AU IC MCU 8051 8K FLASH SPI 44TQFP
鐩搁棞(gu膩n)浠g悊鍟�/鎶€琛�(sh霉)鍙冩暩(sh霉)
鍙冩暩(sh霉)鎻忚堪
ATMEGA48PA-MNR 鍔熻兘鎻忚堪:8浣嶅井鎺у埗鍣� -MCU AVR 4KB FL 256B EE 512B SRAM 20MHz 105C RoHS:鍚� 鍒堕€犲晢:Silicon Labs 鏍稿績:8051 铏曠悊鍣ㄧ郴鍒�:C8051F39x 鏁�(sh霉)鎿�(j霉)绺界窔瀵害:8 bit 鏈€澶ф檪閻橀牷鐜�:50 MHz 绋嬪簭瀛樺劜鍣ㄥぇ灏�:16 KB 鏁�(sh霉)鎿�(j霉) RAM 澶у皬:1 KB 鐗囦笂 ADC:Yes 宸ヤ綔闆绘簮闆诲:1.8 V to 3.6 V 宸ヤ綔婧害鑼冨湇:- 40 C to + 105 C 灏佽 / 绠遍珨:QFN-20 瀹夎棰ㄦ牸:SMD/SMT
ATMEGA48PA-MU 鍔熻兘鎻忚堪:8浣嶅井鎺у埗鍣� -MCU AVR 4KB FLASH 20 MHZ,IND TEMP RoHS:鍚� 鍒堕€犲晢:Silicon Labs 鏍稿績:8051 铏曠悊鍣ㄧ郴鍒�:C8051F39x 鏁�(sh霉)鎿�(j霉)绺界窔瀵害:8 bit 鏈€澶ф檪閻橀牷鐜�:50 MHz 绋嬪簭瀛樺劜鍣ㄥぇ灏�:16 KB 鏁�(sh霉)鎿�(j霉) RAM 澶у皬:1 KB 鐗囦笂 ADC:Yes 宸ヤ綔闆绘簮闆诲:1.8 V to 3.6 V 宸ヤ綔婧害鑼冨湇:- 40 C to + 105 C 灏佽 / 绠遍珨:QFN-20 瀹夎棰ㄦ牸:SMD/SMT
ATMEGA48PA-MU@SL383 鍒堕€犲晢:Atmel 鍔熻兘鎻忚堪:MCU 8-bit ATmega AVR RISC 4KB Flash 2.5V/3.3V/5V 32-Pin QFN EP T/R
ATMEGA48PA-MUR 鍔熻兘鎻忚堪:8浣嶅井鎺у埗鍣� -MCU AVR 4KB FLSH 256B EE 512B SRAM-20MHz IND RoHS:鍚� 鍒堕€犲晢:Silicon Labs 鏍稿績:8051 铏曠悊鍣ㄧ郴鍒�:C8051F39x 鏁�(sh霉)鎿�(j霉)绺界窔瀵害:8 bit 鏈€澶ф檪閻橀牷鐜�:50 MHz 绋嬪簭瀛樺劜鍣ㄥぇ灏�:16 KB 鏁�(sh霉)鎿�(j霉) RAM 澶у皬:1 KB 鐗囦笂 ADC:Yes 宸ヤ綔闆绘簮闆诲:1.8 V to 3.6 V 宸ヤ綔婧害鑼冨湇:- 40 C to + 105 C 灏佽 / 绠遍珨:QFN-20 瀹夎棰ㄦ牸:SMD/SMT
ATMEGA48PA-PN 鍔熻兘鎻忚堪:8浣嶅井鎺у埗鍣� -MCU AVR 4KB FL 256B EE 512B SRAM 20MHz 105C RoHS:鍚� 鍒堕€犲晢:Silicon Labs 鏍稿績:8051 铏曠悊鍣ㄧ郴鍒�:C8051F39x 鏁�(sh霉)鎿�(j霉)绺界窔瀵害:8 bit 鏈€澶ф檪閻橀牷鐜�:50 MHz 绋嬪簭瀛樺劜鍣ㄥぇ灏�:16 KB 鏁�(sh霉)鎿�(j霉) RAM 澶у皬:1 KB 鐗囦笂 ADC:Yes 宸ヤ綔闆绘簮闆诲:1.8 V to 3.6 V 宸ヤ綔婧害鑼冨湇:- 40 C to + 105 C 灏佽 / 绠遍珨:QFN-20 瀹夎棰ㄦ牸:SMD/SMT