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參數(shù)資料
| 型號(hào)： | CYCLONE08UM |
| 英文描述： | MON08 Cyclone Users Manual |
| 中文描述： | 的MON08氣旋用戶手冊(cè) |
| 文件頁數(shù)： | 62/64頁 |
| 文件大?。?/td> | 756K |
| 代理商： | CYCLONE08UM |
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60
MON08 Cyclone User Manual
P&E
Microcomputer
Systems, Inc.
MON08 CYCLONE
Type”. If you are connecting to a class II board, check the “MON08
cable communication connections type” in the “advanced settings”
dialog.
4 – Device entered monitor mode:
Once the software has received, or failed to receive, a break from the
processor, it attempts to communicate with the monitor running on the
68HC08 processor. It tries to read the monitor version number by issuing a
monitor mode read. If the processor fails to respond properly to this
command, this flag will be ‘N’.
5 – Reset was Power-On Reset:
If the device properly entered monitor mode (4), the software will read the
reset status register (RSR). This read does not affect the security sequence,
and occurs purely for diagnostic reasons. The reset status register indicates
the conditions under which the processor underwent the last reset. For the
software to pass the security check properly, it MUST first cause the
processor to undergo a Power-On Reset. The software reads the reset status
register to determine if the last reset was indeed caused by power-on. The
result of the reset status register is indicated in parentheses after the flag
value. If the highest bit is not set then the reset was not a power on reset,
and the flag will indicate ‘N’. Reasons for this include:
1. The processor did not power all the way down because power was
being supplied to the processor through either the port pins, IRQ line,
RESET line, or power pins.
2. The voltage driven on the power pin of the processor did not go
below 0.1 volts.
3. The processor was not reset properly. Check the “Target Hardware
Type”. If you are connecting to a class II board, check the “MON08
cable communication connections type” in the “advanced settings”
dialog.
6 – ROM is accessible (un-secured):
If the device properly entered monitor mode (4), the software reads
locations $FFF6-$FFFF to determine if the processor passes the security
check. Memory locations which are invalid or protected read back from the
device as $AD. If all bytes from $FFF6-$FFFF read a value of $AD, it is
assumed the device is secure, and the flag value is an ‘N’. If all flags 0-5
register a value of ‘Y’ and flag 6 register a value of ‘N,’ then the reset
process has gone correctly except that the security code used to pass
security was incorrect. Specify the correct security code and try again, or
IGNORE the security failure and erase the device. Once you erase a
secured device, you must exit the software and restart it in order to pass
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