AT94K05AL-25BQU Atmel, AT94K05AL-25BQU Datasheet - Page 71
AT94K05AL-25BQU
Manufacturer Part Number
AT94K05AL-25BQU
Description
IC FPSLIC 5K GATE 25MHZ 144-LQFP
Manufacturer
Atmel
Series
FPSLIC®r
Datasheet
1.AT94K05AL-25AJI.pdf
(204 pages)
Specifications of AT94K05AL-25BQU
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
-40°C ~ 85°C
Package / Case
144-LQFP
For Use With
ATSTK594 - BOARD FPSLIC DAUGHTER FOR STK500
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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4.18
4.18.1
4.18.2
4.18.3
1138I–FPSLI–1/08
JTAG Interface and On-chip Debug System
Features
Overview
The Test Access Port – TAP
•
•
•
•
•
The AVR IEEE std. 1149.1 compliant JTAG interface is used for on-chip debugging.
The On-Chip Debug support is considered being private JTAG instructions, and distributed
within ATMEL and to selected third-party vendors only.
Figure 4-16
TAP Controller is a state machine controlled by the TCK and TMS signals. The TAP Controller
selects either the JTAG Instruction Register or one of several Data Registers as the scan chain
(shift register) between the TDI - input and TDO - output. The Instruction Register holds JTAG
instructions controlling the behavior of a Data Register.
Of the Data Registers, the ID-Register, Bypass Register, and the AVR I/O Boundary-Scan Chain
are used for board-level testing. The Internal Scan Chain and Break-Point Scan Chain are used
for On-Chip debugging only.
The JTAG interface is accessed through four of the AVR’s pins. In JTAG terminology, these pins
constitute the Test Access Port - TAP. These pins are:
The IEEE std. 1149.1 also specifies an optional TAP signal; TRST - Test ReSeT - which is not
provided.
• TMS: Test Mode Select. This pin is used for navigating through the TAP-controller state
• TCK: Test Clock. JTAG operation is synchronous to TCK
• TDI: Test Data In. Serial input data to be shifted in to the Instruction Register or Data Register
• TDO: Test Data Out. Serial output data from Instruction register or Data Register
JTAG (IEEE std. 1149.1 Compliant) Interface
AVR I/O Boundary-scan Capabilities According to the JTAG Standard
Debugger Access to:
Extensive On-chip Debug Support for Break Conditions, Including
On-chip Debugging Supported by AVR Studio version 4 or above
machine.
(Scan Chains)
– All Internal Peripheral Units
– AVR Program and Data SRAM
– The Internal Register File
– Program Counter/Instruction
– FPGA/AVR Interface
– Break on Change of Program Memory Flow
– Single Step Break
– Program Memory Breakpoints on Single Address or Address Range
– Data Memory Breakpoints on Single Address or Address Range
– FPGA Hardware Break
– Frame Memory Breakpoint on Single Address
shows a block diagram of the JTAG interface and the On-Chip Debug system. The
AT94KAL Series FPSLIC
71
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