M68EML08GZ16 Emulation Module - Version 4.0
User’s Manual
22
Preparation and Operation
MOTOROLA
Preparation and Operation
2.3 Limitations
Limitations listed here apply to using your EML08GZ16 versus using the
actual MCU in your target system:
Limitation 1 - Crystals:
You can install a crystal at location Y1 and
associated components (refer to the schematic) to be a clock signal source. But
each crystal has slightly different characteristics, and a crystal’s behavior can
differ substantially in different circuits. Satisfactory performance as part of the
EML08GZ16 Y1 timing circuit does not guarantee that the same crystal will
perform satisfactorily on a target board.
Limitation 2 - OSC2:
The OSC2 pin function will not be available on the
target cable. If you wish to use this signal on your target, you must make a
connection between J12 and your target system.
Limitation 3 - LVI Resets:
The emulator will not reset if the target voltage
falls below the LVI thresholds.
Limitation 4 - GR8 and GR4 Registers:
The emulator uses a GZ16 to
emulate all supported MCUs. Several of the GR8 and GR4 registers may be
different than emulator registers, such as in the A/D module.
4K:
Specifies an MCU flash size of 4K.
MCU Family Select
Header, W6
GZ:
Specifies emulation of an HC08GZ family MCU.
Factory setting
GR:
Specifies emulation of an HC08GR family MCU.
Table 2-1 Configuration Components (Continued)
Component
Position
Effect
W5
2
1
9
15
10
16
W6
1
3
W6
1
3
