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您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄25635 > S83C154DCXXX-16R (ATMEL CORP) 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQCC44 PDF資料下載

型號(hào)：	S83C154DCXXX-16R
廠商：	ATMEL CORP
元件分類(lèi)：	微控制器/微處理器
英文描述：	8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQCC44
封裝：	PLASTIC, LCC-44
文件頁(yè)數(shù)：	957/1021頁(yè)
文件大?。?/td>	15196K
代理商：	S83C154DCXXX-16R

32072H–AVR32–10/2012

AT32UC3A3

Apply the TMS sequence 1, 1, 0 to re-enter the Run-Test/Idle state. If the selected Data Register

has a latched parallel-output, the latching takes place in the Update-DR state. The Exit-DR,

Pause-DR, and Exit2-DR states are only used for navigating the state machine.

As shown in the state diagram, the Run-Test/Idle state need not be entered between selecting

JTAG instruction and using Data Registers.

Boundary-scan

The boundary-scan chain has the capability of driving and observing the logic levels on the digi-

tal I/O pins, as well as the boundary between digital and analog logic for analog circuitry having

off-chip connections. At system level, all ICs having JTAG capabilities are connected serially by

the TDI/TDO signals to form a long shift register. An external controller sets up the devices to

drive values at their output pins, and observe the input values received from other devices. The

controller compares the received data with the expected result. In this way, boundary-scan pro-

vides a mechanism for testing interconnections and integrity of components on Printed Circuits

Boards by using the 4 TAP signals only.

The four IEEE 1149.1 defined mandatory JTAG instructions IDCODE, BYPASS, SAMPLE/PRE-

LOAD, and EXTEST can be used for testing the Printed Circuit Board. Initial scanning of the

data register path will show the ID-code of the device, since IDCODE is the default JTAG

instruction. It may be desirable to have the 32-bit AVR device in reset during test mode. If not

reset, inputs to the device may be determined by the scan operations, and the internal software

may be in an undetermined state when exiting the test mode. If needed, the BYPASS instruction

can be issued to make the shortest possible scan chain through the device. The device can be

set in the reset state either by pulling the external RESETn pin low, or issuing the AVR_RESET

instruction with appropriate setting of the Reset Data Register.

The EXTEST instruction is used for sampling external pins and loading output pins with data.

The data from the output latch will be driven out on the pins as soon as the EXTEST instruction

is loaded into the JTAG IR-register. Therefore, the SAMPLE/PRELOAD should also be used for

setting initial values to the scan ring, to avoid damaging the board when issuing the EXTEST

instruction for the first time. SAMPLE/PRELOAD can also be used for taking a snapshot of the

external pins during normal operation of the part.

When using the JTAG Interface for boundary-scan, the JTAG TCK clock is independent of the

internal chip clock. The internal chip clock is not required to run during boundary-scan

NOTE: For pins connected to 5V lines care should be taken to not drive the pins to a logic one

using boundary-scan, as this will create a current flowing from the 3,3V driver to the 5V pull-up

on the line. Optionally a series resistor can be added between the line and the pin to reduce the

Details about the boundary-scan chain can be found in the BSDL file for the device. This can be

found on the Atmel website.

Service Access Bus

The AVR32 architecture offers a common interface for access to On-Chip Debug, programming,

and test functions. These are mapped on a common bus called the Service Access Bus (SAB),

which is linked to the JTAG through a bus master module, which also handles synchronization

between the TCK and SAB clocks.

相關(guān)PDF資料	PDF描述
SD80C32EXXX-30SC	8-BIT, 30 MHz, MICROCONTROLLER, CDIP40
S80C52XXX-12SHXXX:R	8-BIT, MROM, 12 MHz, MICROCONTROLLER, PQCC44
S80C154-20	8-BIT, 20 MHz, MICROCONTROLLER, PQCC44
S83C154DCXXX-12	8-BIT, MROM, 12 MHz, MICROCONTROLLER, PQCC44
S83C154DXXX-12	8-BIT, MROM, 12 MHz, MICROCONTROLLER, PQCC44

相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
S83C154D-L16	制造商:未知廠家制造商全稱(chēng):未知廠家功能描述:8-Bit Microcontroller
S83C154DT-12	制造商:未知廠家制造商全稱(chēng):未知廠家功能描述:8-Bit Microcontroller
S83C154DT-16	制造商:未知廠家制造商全稱(chēng):未知廠家功能描述:8-Bit Microcontroller
S83C154DT-20	制造商:未知廠家制造商全稱(chēng):未知廠家功能描述:8-Bit Microcontroller
S83C154DT-25	制造商:未知廠家制造商全稱(chēng):未知廠家功能描述:8-Bit Microcontroller

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