- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄381451 > AT43USB355M-AC (ATMEL CORP) Full-speed USB Microcontroller with Embedded Hub, ADC and PWM PDF資料下載
參數(shù)資料
| 型號(hào)： | AT43USB355M-AC |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | Full-speed USB Microcontroller with Embedded Hub, ADC and PWM |
| 中文描述： | 8-BIT, MROM, 12 MHz, RISC MICROCONTROLLER, PQFP64 |
| 封裝： | 1.40 MM, PLASTIC, MS-026ACB, LQFP-64 |
| 文件頁數(shù)： | 55/115頁 |
| 文件大?。?/td> | 610K |
| 代理商： | AT43USB355M-AC |
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頁當(dāng)前第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
55
AT43USB355
2603G–USB–04/06
SS Pin Functionality
When the SPI is configured as a master (MSTR in SPCR is set), the user can determine the
direction of the SS pin. If SS is configured as an output, the pin is a general output pin which
does not affect the SPI system. If SS is configured as an input, it must be held high to ensure
Master SPI operation. If the SS pin is driven low by peripheral circuitry when the SPI is config-
ured as master with the SS pin defined as an input, the SPI system interprets this as another
master selecting the SPI as a slave and starting to send data to it. To avoid bus contention, the
SPI system takes the following actions:
1.
The MSTR bit in SPCR is cleared and the SPI system becomes a slave. As a result of
the SPI becoming a slave, the MOSI and SCK pins become inputs.
2.
The SPIF flag in SPSR is set, and if the SPI interrupt is enabled and the I-bit in SREG
are set, the interrupt routine will be executed.
Thus, when interrupt-driven SPI transmittal is used in master mode, and there exists a possi-
bility that SS is driven low, the interrupt should always check that the MSTR bit is still set.
Once the MSTR bit has been cleared by a slave select, it must be set by the user to re-enable
SPI master mode.
When the SPI is configured as a slave, the SS pin is always input. When SS is held low, the
SPI is activated and MISO becomes an output if configured so by the user. All other pins are
inputs. When SS is driven high, all pins are inputs, and the SPI is passive, which means that it
will not receive incoming data. Note that the SPI logic will be reset once the SS pin is brought
high. If the SS pin is brought high during a transmission, the SPI will stop sending and receiv-
ing immediately and both data received and data sent must be considered as lost.
Data Modes
There are four combinations of SCK phase and polarity with respect to serial data, which are
determined by control bits CPHA and CPOL. The SPI data transfer formats are shown in Fig-
ure 20 and Figure 21.
Figure 20.
SPI Transfer Format with CPHA = 0 and DORD = 0
Note:
* Not defined but normally LSB of character just received.
*
LSB
1
2
3
4
5
6
MSB
LSB
1
2
3
4
5
6
1
2
3
4
5
6
7
8
MSB
SCK Cycle #
(For Reference)
SCK (CPOL = 0)
SCK (CPOL = 1)
MOSI
(From Master)
MISO
(From Slave)
SS (To Slave)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AT43USB355M-AU | Full-speed USB Microcontroller with Embedded Hub, ADC and PWM |
| AT43USB380 | On-The-Go Upgrade of the AT43USB370 USB 2.0 Full-Speed Host/Function Processor |
| AT45BR3214B | 32-MEGABIT DATAFLASH + 4-MEGABIT SRAM STACK MEMORY |
| AT45BR3214B-C1 | 32-MEGABIT DATAFLASH + 4-MEGABIT SRAM STACK MEMORY |
| AT45CS1282 | 128-megabit 2.7-volt Dual-interface Code Shadow DataFlash |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AT43USB355M-AU | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Full-speed USB Microcontroller with Embedded Hub, ADC and PWM |
| AT43USB370 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:USB 2.0 Full-Speed Host/Function Processor |
| AT43USB370E-AC | 功能描述:USB 接口集成電路 USB HOST DEVICE CONTROL - COM TEMP RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| AT43USB380 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:On-The-Go Upgrade of the AT43USB370 USB 2.0 Full-Speed Host/Function Processor |
| AT43USB380E-AC | 功能描述:USB 接口集成電路 USB OTG/HOST/FUNC DEVICE CNTRL RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。