AT94K05AL-25BQC Atmel, AT94K05AL-25BQC Datasheet - Page 79
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AT94K05AL-25BQC
Manufacturer Part Number
AT94K05AL-25BQC
Description
IC FPSLIC 5K GATE 25MHZ 144LQFP
Manufacturer
Atmel
Series
FPSLIC®r
Specifications of AT94K05AL-25BQC
Core Type
8-bit AVR
Speed
25MHz
Interface
I²C, UART
Program Sram Bytes
4K-16K
Fpga Sram
2kb
Data Sram Bytes
4K ~ 16K
Fpga Core Cells
256
Fpga Gates
5K
Fpga Registers
436
Voltage - Supply
3 V ~ 3.6 V
Mounting Type
Surface Mount
Operating Temperature
0°C ~ 70°C
Package / Case
144-LQFP
For Use With
ATSTK594 - BOARD FPSLIC DAUGHTER FOR STK500
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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4.22
4.22.1
4.22.2
4.22.2.1
1138I–FPSLI–1/08
AVR Reset Register
Boundary-scan Chain
Boundary-scan Specific JTAG Instructions
EXTEST; $0
The AVR Reset Register is a Test Data Register used to reset the AVR. A high value in the
Reset Register corresponds to pulling the external AVRResetn Low. The AVR is reset as long as
there is a high value present in the AVR Reset Register. Depending on the Bit settings for the
clock options, the CPU will remain reset for a Reset Time-Out Period after releasing the AVR
Reset Register. The output from this Data Register is not latched, so the reset will take place
immediately, see
Figure 4-19. Reset Register
The Boundary-scan Chain has the capability of driving and observing the logic levels on the
AVR’s digital I/O pins.
See
The instruction register is 4-bit wide, supporting up to 16 instructions. Listed below are the JTAG
instructions useful for Boundary-Scan operation. Note that the optional HIGHZ instruction is not
implemented.
As a definition in this data sheet, the LSB is shifted in and out first for all shift registers.
The OPCODE for each instruction is shown behind the instruction name in hex format. The text
describes which data register is selected as path between TDI and TDO for each instruction.
Mandatory JTAG instruction for selecting the Boundary-Scan Chain as Data Register for testing
circuitry external to the AVR package. For port-pins, Pull-up Disable, Output Control, Output
Data, and Input Data are all accessible in the scan chain. For Analog circuits having off-chip
connections, the interface between the analog and the digital logic is in the scan chain. The con-
tents of the latched outputs of the Boundary-Scan chain are driven out as soon as the JTAG IR-
register is loaded by the EXTEST instruction.
The active states are:
“Boundary-scan Chain” on page 80
From other internal and
external reset sources
Figure
ClockDR · AVR_RESET
4-19.
From
TDI
D
for a complete description.
Q
TDO
To
AT94KAL Series FPSLIC
Internal AVR Reset
79
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