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参数资料
| 型号： | FR3-8M |
| 厂商： | TechTools |
| 文件页数： | 30/38页 |
| 文件大小： | 0K |
| 描述： | EMULATOR FLASH FLEXROM III 8MEG |
| 标准包装： | 1 |
| 系列： | FlexROM™ III |
| 类型： | 存储器 |
| 适用于相关产品： | 外部 FLASH、EPROM 或 SRAM 设备 |
| 所含物品： | 需要 FR3 FlexROM III 仿真器、缆线（菊花链、LPT、迷你型夹和目标）、软件、有源缆线模块 |
| 其它名称： | FR38M |
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Verifies, but target does not run
Target not being reset or not being released from reset
If the wrong reset output is being used or it is connected to the wrong spot on the target, it may not be
resetting the target during the download. We would get a good download, but the target was fetching
garbage during the transfer. Some processors will HALT, others will simply execute the random garbage
they received. In either event, the processor will not “know” to start over and execute the new code.
Try pushing your target’s reset button if it has one. If it starts to run, the reset line is connected to the
wrong place on the target.
Try removing the reset line. If the target starts running, you probably selected the wrong reset polarity.
If the emulator is running from an external power supply, try removing the reset line and cycling TARGET
power. If the target now comes up and runs, the reset signal connection was wrong. While you could do
this after each load, we highly recommend correcting the reset problem to make resets automatic and to
prevent the target from running garbage during the download. The reset line also ensures proper power-up
sequencing by preventing the target from fetching code before the emulator has had a chance to enable its
target-side buffers.
Emulator device size set wrong.
The device SIZE configuration affects how many target address lines are enabled. The file will download
and verify correctly as long as the file is less than or equal the SIZE setting and the maximum emulator size.
If the size is set larger than the device you are emulating, some extra address lines will be enabled. The
target may be driving these lines high or NOT AT ALL. This will either warp the addressing or cause
random address changes. Ensure you are configuring the SIZE to match the device you are emulating.
Wrong PLCC or other adapters used.
Any adapter used between the target cable and the target socket itself has the potential of introducing errors.
In particular, PLCC footprints vary by EPROM size, model and manufacturer. In general, small EPROMs
(<1Mbit) generally have one pin out and larger EPROMs have a different pin out. Most FLASH chips are
pinned out like large EPROMs. However, SOME small FLASH are wired like SMALL EPROMs. In
general, large devices (>=1Mbit) use a 32 pin DIP to 32 pin PLCC adapter. Smaller devices usually need a
28 pin DIP to 32 pin PLCC adapter but MIGHT need the 32 pin version. Give us a call if you are not sure.
Wrong file format specified
The files you wish to download might be in a HEX format or they might be a raw, binary image. The
loaders need to be ‘told’ whether they are in HEX or BINARY format. If you are not sure about the file’s
format, “TYPE” it to the screen. If you see random printable, non-printable and graphics characters, it is
BINARY. If you see well formatted HEX characters, it is a HEX file. Intel HEX files start each line with a
“:”. Motorola ‘S’ files start each line with an “S”. Tektronix HEX files start with a “%” or a “/”. All of our
loaders automatically recognizes and converts 8 variations of these HEX formats. However, even HEX
files are a FORM of binary so you must tell the loaders whether to blindly load them as binary or assume
they are in HEX format.
Remember, your Resume’ will load and verify, but most likely will not execute properly!
FlexROM III User’s Manual
28
Copyright ? 2001, TechTools
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