Fujitsu F2 MC-16L Operation Manual page 19

■ Setting of the user data bus switch
If the probing target pins (P00 to P07, P10 to P17) have a special specification, such as for a high-
voltage port, set the user data bus probing circuit to "Disconnect."
When the external bus of the evaluation MCU is not used, "Disconnect" is the recommended setting
for the user data bus probing circuit.
Using the user data bus switch on the adapter board, set the user data bus probing circuit to "Connect"
or "Disconnect."
Figure 15 shows the peripheral circuit configuration of the user data bus switch. Table 9 lists the set-
tings of the switch.
Probing target pin
P00 to P07
(Setting of P0 SENSE
(SW2))
P10 to P17
(Setting of P1 SENSE
(SW1))
Note : This circuit has a function equivalent to that of a high-resistance pull-up resistor.
When all buses of the evaluation MCU and user system are in the Hi-Z state, approximately 3.0 V ap-
pears on the bus.
Table 9 Settings of the user data bus switch
1
Connect ON
Disconnect OFF
Connect ON
Disconnect OFF
2 3 4
ON ON ON
OFF OFF OFF
ON ON ON
OFF OFF OFF
5 6 7
ON ON ON
OFF OFF OFF
ON ON ON
OFF OFF OFF
8
ON
OFF
ON
OFF
15