参数资料
型号: MC68LC302PU25CT
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 4 CHANNEL(S), 10M bps, LOCAL AREA NETWORK CONTROLLER, PQFP100
封装: 14 X 14 MM, 1.40 MM HEIGHT, 0.50 MM PITCH, PLASITC, LQFP-100
文件页数: 127/128页
文件大小: 641K
代理商: MC68LC302PU25CT
IEEE 1149.1 (JTAG) Test Access Port
MOTOROLA
7-13
7.4.1 EXTEST
The external test (EXTEST) instruction selects the 163-bit boundary scan register.
By using the TAP, the register is capable of a) scanning user-defined values into the output
buffers, b) capturing values presented to input pins, c) controlling the direction of bidirec-
tional pins, and d) controlling the output drive of three-stateable output pins. For more details
on the function and use of EXTEST, refer to the IEEE 1149.1 document.
7.4.2 SAMPLE/PRELOAD
The SAMPLE/PRELOAD instruction provides two separate functions. First, it provides a
means to obtain a snapshot of system data and control signals. The snapshot occurs on the
rising edge of TCK in the capture-DR controller state. The data can be observed by shifting
it transparently through the boundary scan register.
NOTE
Since there is no internal synchronization between the scan
chain clock (TCK) and the system clock (CLKO), the user must
provide some form of external synchronization to achieve mean-
ingful results.
The second function of SAMPLE/PRELOAD is to initialize the boundary scan register output
cells prior to selection of EXTEST. This initialization ensures that known data will appear on
the outputs when entering the EXTEST instruction.
7.4.3 BYPASS
The BYPASS instruction selects the single-bit bypass register as shown in Figure 7-11. This
creates a shift register path from TDI to the bypass register and, finally, to TDO, circumvent-
ing the 163-bit boundary scan register. This instruction is used to enhance test efficiency
when a component other than the MC68EN302 becomes the device under test.
Figure 7-11. Bypass Register
When the bypass register is selected by the current instruction, the shift register stage is set
to a logic zero on the rising edge of TCK in the capture-DR controller state. Therefore, the
first bit to be shifted out after selecting the bypass register will always be a logic zero.
1
Mux
G1
C
D
TO TDO
FROM TDI
0
SHIFT DR
相关PDF资料
PDF描述
MC908AB32VFUR2 8-BIT, FLASH, 8.4 MHz, MICROCONTROLLER, PQFP64
MC908AZ60AVFUR2 8-BIT, FLASH, 8.4 MHz, MICROCONTROLLER, PQFP64
MC912D60ACFU8 16-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP80
MCHC908JK3CDWR2 8-BIT, FLASH, 4 MHz, MICROCONTROLLER, PDSO20
MPC563MZP66R2 32-BIT, FLASH, 66 MHz, RISC MICROCONTROLLER, PBGA388
相关代理商/技术参数
参数描述
MC68LK332ACAG16 功能描述:32位微控制器 - MCU 32BIT MCU 2KRAM TPU QSM RoHS:否 制造商:Texas Instruments 核心:C28x 处理器系列:TMS320F28x 数据总线宽度:32 bit 最大时钟频率:90 MHz 程序存储器大小:64 KB 数据 RAM 大小:26 KB 片上 ADC:Yes 工作电源电压:2.97 V to 3.63 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:LQFP-80 安装风格:SMD/SMT
MC68LK332ACAG16 制造商:Freescale Semiconductor 功能描述:Microcontroller
MC68LK332ACEH16 功能描述:32位微控制器 - MCU 32BIT MCU 2KRAM TPU QSM RoHS:否 制造商:Texas Instruments 核心:C28x 处理器系列:TMS320F28x 数据总线宽度:32 bit 最大时钟频率:90 MHz 程序存储器大小:64 KB 数据 RAM 大小:26 KB 片上 ADC:Yes 工作电源电压:2.97 V to 3.63 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:LQFP-80 安装风格:SMD/SMT
MC68LK332ACPV16 功能描述:IC MCU 32BIT LV AMASK 144-LQFP RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器, 系列:M683xx 其它有关文件:STM32F101T8 View All Specifications 特色产品:STM32 32-bit Cortex MCUs 标准包装:490 系列:STM32 F1 核心处理器:ARM? Cortex?-M3 芯体尺寸:32-位 速度:36MHz 连通性:I²C,IrDA,LIN,SPI,UART/USART 外围设备:DMA,PDR,POR,PVD,PWM,温度传感器,WDT 输入/输出数:26 程序存储器容量:64KB(64K x 8) 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:10K x 8 电压 - 电源 (Vcc/Vdd):2 V ~ 3.6 V 数据转换器:A/D 10x12b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:36-VFQFN,36-VFQFPN 包装:托盘 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名称:497-9032STM32F101T8U6-ND
MC68LK332GCAG16 功能描述:32位微控制器 - MCU 32BIT MCU 2KRAM TPU QSM RoHS:否 制造商:Texas Instruments 核心:C28x 处理器系列:TMS320F28x 数据总线宽度:32 bit 最大时钟频率:90 MHz 程序存储器大小:64 KB 数据 RAM 大小:26 KB 片上 ADC:Yes 工作电源电压:2.97 V to 3.63 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:LQFP-80 安装风格:SMD/SMT