User Data Bus Switching - Fujitsu F2MC-16L Hardware Manual

CHAPTER 3 OPERATING THE EMULATOR
3.6

User Data Bus Switching

Set the setting of the user data bus selection switch.
I Switching of the user data bus
CAUTION
Prohibition
If probing target pins (P00 to P07 and P10 to P17) have special specifications, such as for high-
voltage ports, the user data bus probing circuit must be set to the disconnected status.
When the external bus of the evaluation MCU is not used, the disconnected status is the
recommended setting for the user data bus probing circuit.
Using the user data bus selection switch on the emulator, set the user data bus probing circuit
to the connected or disconnected status.
Figure 3.6-1 "Configuration of the peripheral circuit for the user data bus selection switch"
shows the configuration of the peripheral circuit for the user data bus selection switch. Table
3.6-1 "Settings of user data bus selection switch" lists switch settings.
Table 3.6-1 Settings of user data bus selection switch
Probing target pin
P00 to P07 Connected
(P0 SENSE setting)
Disconnected
P10 to P17 Connected
(P1 SENSE setting)
Disconnected
Note:
This circuit has a function equivalent to that of a pull-up circuit with high resistance.
If all buses in the evaluation MCU and user system are in the Hi-Z state, about 3.0 V
appears on the user data bus.
42
Make sure that power to the product is turned off and the power plug is
disconnected from outlets before handling switches. Doing so may
result in device problems or electric shock.
1 2 3
ON ON ON
OFF OFF OFF
ON ON ON
OFF OFF OFF
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4 5 6
ON ON ON
OFF OFF OFF
ON ON ON
OFF OFF OFF
7 8
ON ON
OFF OFF
ON ON
OFF OFF