Monday, March 17, 2014

J-Link V8+ ARM USB-JTAG Adapter Emulator

J-Link emulation is the ARM core chip designed by SEGGER company to support the launch of the JTAG emulator.
This is the new version --V8.0,the improved version of V7.0.And J-Link V8.0 has improved the SWD interface circuit,with the use of counterfeit JLINK V8 JTAG debug,debug mode can be normal when debugging CORTEX-M3 core chips will not use SWD functionality, V7 hardware SWD part is not the same with the V8, if V7.0 is forced to switch to SWD mode, the main chip of JLINK will be destroyed.

The real JLINK V8.0 interface circuit uses two-level converter chip, so using one level converter chip will be a fake one.
JLINK V8.0 has two-color LED,so it can indicate more work status, V7.0 only has one LED indicator light.
It is the best choice for ARM11,it is better and faster than JLINK V7 when to support for ARM11.

Besides the improved points compared to V7.0,V8.0 has many other features:
1.V8 uses AT91SAM7S64, expanding the capacity of Flash and SRAM to help future upgrades;It improves the SWD interface, an increase of driver chips;
2.V8 SWD improved control methods, V7 is the I / O direct-drive, V8 with a special method, yet it is not effective, V8`s SWD velocities slower than the V7;
3.V8 has three lights, one directed USB Communications, a direct target CPU, reset state, a direct 5V output is turned on V7 only 1 USB communication indicator;
4.The firmware update process of J-Link V8 is not DLL, and can't write the same as V7 Boot loader ,V8`s Boot loader needs to implement USB device connectivity;
5. IAR EWARM integrated development environment connects to JTAG Emulator seamlessly;
6. V8.0 supports all ARM7/ARM9 core chips, as well as cortex M3, including Thumb mode;
7. V8.0 supports for ADS, IAR, KEIL, WINARM, REALVIEW almost all the development environment;
8. The download speeds are up to ARM7: 600kB / s, ARM9: 550kB / s, through the DCC up to 800 Kb / s;
9. The maximum JTAG speed is 12 MHz;
10. The range of target board voltage is 1.2V-3.3V, 5V compatible;
11. V8.0 has auto speed recognition;
12. Monitoring all JTAG signals and target board voltage Fully plug and play;
13. V8.0 needs to use the USB power supply ,but not the target board power supply;
Microsoft Windows 2000,XP, XP x64,2003,003 x64,Vista and Vista x64 are all the supported operating systems.

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