Freescale Semiconductor Microcontrollers - Manual (Page 353)

ICS MON08 Interface Connection
Connection Procedure
353 Microcontrollers Debugger Manual
Target Has RESET Button
In Class III boards, the software occasionally needs to get control of the target. For a
detailed definition of board classes, see
Device Class Description . On systems which are
Class III boards with the monitor mode circuitry built-in (including RS-232 driver), there
is no means to reset the target to gain control. If the board has a reset button, the software
can use this to gain control of the target system. If this option is checked, the software
prompts the user to push the target reset button when a reset of the target system is desired.
If the option is unchecked, the software prompts the user to power cycle the target system
to achieve a reset.
MON08 Cable Connection Communications Type
This selection box is valid only for Class II hardware configurations using the MON08
cable. For a detailed definition of board classes, see
Device Class Description . It allows
the user to specify the sequence that the software uses to power up the ICS system. When
the software tries to create a power-on reset condition, two events must occur:
1. Power of the target MCU must go below 0.1v. This means that the processor cannot be
receiving power from its power pins, nor can it have a significant voltage being driven
on port pins or the IRQ line, as these drive the MCU power back through these pins. It
is crucial, therefore, to have the ICS and the Target both powered down at some point
in time.
2. The processor MON08 configuration pins, including IRQ, must be properly driven
when the target processor resets to drive it into monitor mode. If these pins are not set
up properly before the processor powers up, the processor may start up in user mode.
Power Up and Power Down Radio Buttons
Power Down ICS button prompts the user to power down the board, Power Up ICS
button prompts the user to power up their board.
This is the default option and works for most, if not all, ICS08/Target Board solutions. It
requires the user go through two dialog box stages, and requires more time than simply
cycling the power.
1. Software automatically powers down the ICS.
2. Software prompts the user to power down the board as follows: