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M-78F0714 Micro-Board for µPD78F0714 Microcontroller
The X1 and X2 pins of the µPD78F0714 are also connected to the I/O pin array, and may be driven
by external connection to the appropriate pins of the I/O pin array. In this case, all pins of 2JP5
should be left open.
The 2JP5 should be left open when using the 10-pin connector, 2JP7, connecting to the on-chip
debugging emulator, such as QB-78K0MINI.
Setting
Selected Main Clock Source
2 to 6
Select X2 from M-78F0714 micro-board
3 to 5
Select X1 from M-78F0714 micro-board
1 to 2
Select X1_OSC from MC-IO board
Open
When using OCD connector 2JP7
Open
When using clock from 2J1on the target system
Note: For a driven clock, X1_OSC (X1_OSC from the MC-IO board connector 2P1) can be
connected to X1 by inserting a jumper on pin 1 to pin 2 while X2_OSC is open. Refer to the
µPD78F0714 User's Manual for information about configuring a driven clock for X1 and X2.
4.5 Subclock Selection
The subclock is not supported for the µPD78F0714.
4.6 1J1: µPD78F0714 I/O Pin Array
1J1 is a pin array connecting the µPD78F0714 I/O pins. It is an optional array for mounting the
micro-board directly onto your target system, or for allowing easy access to all I/O pins. 1J1 is
divided into four groups of 16 pins around the MCU.
8
Figure 6.
2JP5 Jumper
2JP5
2Y2 (20MHz - Osc.)
1
HC49US20.000MABJ
X1_OSC
2
6
X1
3
5
X2
4
X2_OSC
18pF
2JP5 Settings
Table 4.
2Y2
18pF
GND
GND
X1 Clock
X1 = 20 MHz
Must be selected as a pair
Note
Status
Default
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