- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄3975 > 20-668-0003 (Rabbit Semiconductor)IC CPU RABBIT2000 30MHZ 100PQFP PDF資料下載
參數(shù)資料
| 型號： | 20-668-0003 |
| 廠商： | Rabbit Semiconductor |
| 文件頁數(shù)： | 36/228頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC CPU RABBIT2000 30MHZ 100PQFP |
| 標準包裝： | 66 |
| 系列： | Rabbit 2000 |
| 處理器類型： | Rabbit 2000 8-位 |
| 速度： | 30MHz |
| 電壓： | 2.7V，3V，3.3V，5V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 100-BQFP |
| 供應(yīng)商設(shè)備封裝： | 100-PQFP（14x20） |
| 包裝： | 托盤 |
| 其它名稱： | 20-668-0003-ND 316-1062 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁當(dāng)前第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁第123頁第124頁第125頁第126頁第127頁第128頁第129頁第130頁第131頁第132頁第133頁第134頁第135頁第136頁第137頁第138頁第139頁第140頁第141頁第142頁第143頁第144頁第145頁第146頁第147頁第148頁第149頁第150頁第151頁第152頁第153頁第154頁第155頁第156頁第157頁第158頁第159頁第160頁第161頁第162頁第163頁第164頁第165頁第166頁第167頁第168頁第169頁第170頁第171頁第172頁第173頁第174頁第175頁第176頁第177頁第178頁第179頁第180頁第181頁第182頁第183頁第184頁第185頁第186頁第187頁第188頁第189頁第190頁第191頁第192頁第193頁第194頁第195頁第196頁第197頁第198頁第199頁第200頁第201頁第202頁第203頁第204頁第205頁第206頁第207頁第208頁第209頁第210頁第211頁第212頁第213頁第214頁第215頁第216頁第217頁第218頁第219頁第220頁第221頁第222頁第223頁第224頁第225頁第226頁第227頁第228頁
124
Rabbit 2000 Microprocessor User’s Manual
12.3 Transmit Serial Data Timing
On transmit, if the interrupts are enabled, an interrupt is requested when the transmit regis-
ter becomes empty and, in addition, an interrupt occurs when the shift register and trans-
mit register both become empty, that is, when the transmitter becomes idle. When the
transmit data register contains data and the shift register finishes sending data, the data bits
are clocked from the transmit register to the shift register, and the shift register is never
idle. The interrupt request is cleared either by writing to the data register or by writing to
the status register (which does not affect the status register). The data register normally is
clocked into the shift register each time the shift register finishes sending data, leaving the
data register empty. This causes an interrupt request. The interrupt routine normally
answers the interrupt before the shift register runs dry (9 to 11 baud clocks, depending on
the mode of operation). The interrupt routine stores the next data item in the data register,
clearing the interrupt request and supplying the next data bits to be sent. When all the
characters have been sent, the interrupt service routine answers the interrupt once the data
register becomes empty. Since it has no more data, it clears the interrupt request by storing
to the status register. At this point the routine should check if the shift register is empty;
normally it won’t be. If it is, because the interrupt was answered late, the interrupt routine
should do any final cleanup and store to the status register again in case the shift register
became empty after the pending interrupt is cleared. Normally, though, the interrupt ser-
vice routine will return and there will be a final interrupt to give the routine a chance to
disable the output buffers, as in the case for RS-485 transmission.
12.4 Receive Serial Data Timing
When the receiver is ready to receive data, a falling edge indicates that a start bit must be
detected. The falling edge is detected as a different Rx input between two different clocks,
the clock being 16x the baud rate. Once the start bit has been detected, data bits are sam-
pled at the middle of each data bit and are shifted into the receive shift register. After 7 or
8 data bits have been received, the next bit will be either a 9th (8th) address bit, or a stop
bit will be sampled. If the Rx line is low, it is an address bit and the address bit received bit
in the status register will be enabled. If an address bit is detected, the receiver will attempt
to sample the stop bit. If the line is high when sampled, it is a stop bit and a new scan for a
new start bit will begin after the sample point. At the same time, the data bits are trans-
ferred into the receive data register and an interrupt, if enabled, is requested.
On receive, an interrupt is requested when the receiver data register has data. This happens
when data bits are transferred from the receive shift register to the data register. This also
sets bit 7 of the status register. The interrupt request and bit 7 are cleared when the data
register is read.
An interrupt is requested if bit 7 is high. The interrupt is requested on the edge of the trans-
mitter data register becoming empty or the transmitter shift register becoming empty. The
transmitter interrupt is cleared by writing to the status register or to the data register.
On receive, the scan for the next start bit starts immediately after the stop bit is detected.
The stop bit is normally detected at a sample clock that nominally occurs in the center of
the stop bit. If there is a 9th (8th) address bit, the stop bit follows that bit.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AMM36DRES | CONN EDGECARD 72POS .156 EYELET |
| FMC65DREN-S734 | CONN EDGECARD 130POS .100 EYELET |
| IDT7133LA20G | IC SRAM 32KBIT 20NS 68PGA |
| FMC65DREH-S734 | CONN EDGECARD 130POS .100 EYELET |
| EMC65DTEF | CONN EDGECARD 130POS .100 EYELET |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 20-668-0011 | 功能描述:微處理器 - MPU Rabbit 3000A LQFP Microprocessor RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:536 MHz 程序存儲器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324 |
| 20-668-0016 | 功能描述:微處理器 - MPU Rabbit 3000 TFBGA Microprocessor RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:536 MHz 程序存儲器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324 |
| 2066-8001-90 | 制造商:TE CONNECTIVITY 功能描述:RF COAXIAL PANEL MOUNT CONNECTOR |
| 20-668-0022 | 功能描述:微處理器 - MPU Rabbit 4000 LQFP Microprocessor RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:536 MHz 程序存儲器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324 |
| 20-668-0024 | 功能描述:微處理器 - MPU Rabbit 4000 LQFP Microprocessor RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:536 MHz 程序存儲器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。