- 您现在的位置：买卖IC网 > Sheet目录395 > ATMEGA128RFA1-ZUR (Atmel)IC AVR MCU 2.4GHZ XCEIVER 64QFN
ATmega128
or cleared by manipulating the T W I Control Register (T W CR). W hen in Transmitter mode, the
value of the received (N)ACK bit can be determined by the value in the T W SR.
The START/STOP Controller is responsible for generation and detection of START, REPEATED
START, and STOP conditions. The START/STOP controller is able to detect START and STOP
conditions even when the AVR MCU is in one of the sleep modes, enabling the MCU to wake up
if addressed by a master.
If the T W I has initiated a transmission as master, the Arbitration Detection hardware continu-
ously monitors the transmission trying to determine if arbitration is in process. If the T W I has lost
an arbitration, the Control Unit is informed. Correct action can then be taken and appropriate
status codes generated.
Address Match Unit
Control Unit
The Address Match unit checks if received address bytes match the 7-bit address in the T W I
Address Register (T W AR). If the T W I General Call Recognition Enable (T W GCE) bit in the
T W AR is written to one, all incoming address bits will also be compared against the General Call
address. Upon an address match, the Control Unit is informed, allowing correct action to be
taken. The T W I may or may not acknowledge its address, depending on settings in the T W CR.
The Address Match unit is able to compare addresses even when the AVR MCU is in sleep
mode, enabling the MCU to wake up if addressed by a master. If another interrupt (e.g., INT0)
occurs during T W I Power-down address match and wakes up the CPU, the T W I aborts opera-
tion and return to it’s idle state. If this cause any problems, ensure that T W I Address Match is the
only enabled interrupt when entering Power-down.
The Control unit monitors the T W I bus and generates responses corresponding to settings in the
T W I Control Register (T W CR). W hen an event requiring the attention of the application occurs
on the T W I bus, the T W I Interrupt Flag (T W INT) is asserted. In the next clock cycle, the T W I Sta-
tus Register (T W SR) is updated with a status code identifying the event. The T W SR only
contains relevant status information when the T W I Interrupt Flag is asserted. At all other times,
the T W SR contains a special status code indicating that no relevant status information is avail-
able. As long as the T W INT flag is set, the SCL line is held low. This allows the application
software to complete its tasks before allowing the T W I transmission to continue.
The T W INT flag is set in the following situations:
?
?
?
?
?
?
?
?
After the T W I has transmitted a START/REPEATED START condition
After the T W I has transmitted SLA+R/ W
After the T W I has transmitted an address byte
After the T W I has lost arbitration
After the T W I has been addressed by own slave address or general call
After the T W I has received a data byte
After a STOP or REPEATED START has been received while still addressed as a slave
W hen a bus error has occurred due to an illegal START or STOP condition
204
2467X–AVR–06/11
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
ATMEGA64RZAPV-10AU
BUNDLE ATMEGA644P/AT86RF230 TQFP
ATP101-TL-H
MOSFET P-CH 30V 25A ATPAK
ATP102-TL-H
MOSFET P-CH 30V 40A ATPAK
ATP103-TL-H
MOSFET P-CH 30V 55A ATPAK
ATP104-TL-H
MOSFET P-CH 30V 75A ATPAK
ATP106-TL-H
MOSFET P-CH 40V 30A ATPAK
ATP107-TL-H
MOSFET P-CH 40V 50A ATPAK
ATP108-TL-H
MOSFET P-CH 40V 70A ATPAK
相关代理商/技术参数
ATMEGA128RFA1-ZUR SL514
制造商:Atmel Corporation 功能描述:
ATMEGA128RFA1-ZUR00
制造商:Atmel Corporation 功能描述:2.4GHZ 802.15.4 128K SOC REVF 制造商:Atmel Corporation 功能描述:2.4GHZ 802.15.4 128K SOC REVF T&R - Bulk 制造商:Atmel from Components Direct 功能描述:ATMEL ATMEGA128RFA1-ZUR00 MICROCONTROLLERS (MCU) 制造商:Atmel 功能描述:Atmel ATMEGA128RFA1-ZUR00 Microcontrollers (MCU) 制造商:Atmel Corporation 功能描述:MCU AVR 2.4GHZ 128K FLASH 64VQFN 制造商:Atmel Corporation 功能描述:2.4GHZ 802.15.4 128K SOC Revision F 制造商:Atmel 功能描述:2.4GHZ 802.15.4 128K SOC REVF
ATMEGA128RFR2-ZF
功能描述:IC RF TXRX+MCU 802.15.4 64-VFQFN 制造商:microchip technology 系列:- 包装:托盘 零件状态:在售 类型:TxRx + MCU 射频系列/标准:802.15.4 协议:Zigbee? 调制:DSSS， O-QPSK 频率:2.4GHz 数据速率（最大值）:2Mbps 功率 - 输出:3.5dBm 灵敏度:-100dBm 存储容量:128kB 闪存，4kB EEPROM，16kB SRAM 串行接口:I2C，JTAG，SPI，USART GPIO:35 电压 - 电源:1.8 V ~ 3.6 V 电流 - 接收:5mA ~ 12.5mA 电流 - 传输:8mA ~ 14.5mA 工作温度:-40°C ~ 125°C 封装/外壳:64-VFQFN 裸露焊盘 标准包装:260
ATMEGA128RFR2-ZU
制造商:Atmel Corporation 功能描述:2.4GHZ 802.15.4 128K SOC IND 85C - Bulk
ATMEGA128RFR2-ZUR
制造商:Atmel Corporation 功能描述:2.4GHZ 802.15.4 128K SOC 85C T&R - Tape and Reel
ATMEGA128RZAV-8AU
功能描述:射频微控制器 - MCU AVR Z-Link Bundle RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:Si100x 数据总线宽度:8 bit 最大时钟频率:24 MHz 程序存储器大小:64 KB 数据 RAM 大小:4 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:LGA-42 安装风格:SMD/SMT 封装:Tube
ATMEGA128RZAV-8MU
功能描述:射频微控制器 - MCU AVR Z-Link Bundle RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:Si100x 数据总线宽度:8 bit 最大时钟频率:24 MHz 程序存储器大小:64 KB 数据 RAM 大小:4 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:LGA-42 安装风格:SMD/SMT 封装:Tube