Subsystem Clock; Subsystem Clock Setting; Table 3-19: Subsystem Clock Settings - NEC IE-78K0-NS-P04 Preliminary User's Manual

IE-78K0-NS-P04, IE-1615-NS-EM4

3.3 Subsystem Clock

3.3.1 Subsystem Clock Setting

Subsystem Clock Frequency to be Used
When using clock that
is already mounted on
main board
When using user-
mounted clock
When using external
clock
Caution: Jumper JP8, which is used to select the board's clock or an external clock, should be
set only after turning off the IE-78K0-NS-A's power.
(1) When using clock that is already mounted on main board
When the IE-78K0-NS-P04 is shipped, there is no 32.768 KHz crystal on the board. The parts holder
on X1 is shortened between 6 and 8. Short pins 5 and 6 of JP8 of the IE-78K0-NS-A's main board to
use the 32.768 KHz crystal of the emulator. There is no additional setting of the integrated debugger
ID78K0-NS necessary.
(2) When using the user-mounted clock on the IE-78K0-NS-P04 Emulation Board
The settings described under either (a) or (b) are required, depending on the type of clock to be used.
Short pins 1 and 2 on the IE-78K0-NS-A's jumper (JP8).
There is no need to make any other settings via the integrated debugger (ID78K0-NS).
(a) When using a ceramic oscillator or crystal resonator
- Items to be prepared
- Parts board (supplied with IE-78K0-NS-P04)
- Ceramic oscillator or crystal resonator
- Resistor Rx
<Steps>
<1> Solder onto the supplied parts board (as shown below) the target ceramic oscillator or crystal
resonator, resistor Rx, capacitor CA, and capacitor CB (all with suitable oscillation frequency).
40

Table 3-19: Subsystem Clock Settings

32.768 KHz
Other than 32.768 KHz
IE-78K0-NS-P04
IE-78K0-NS-A
Emulation Board
Parts holder (X1)
Short 6 - 8 Short 5 - 6
Includes oscillator Short 1 - 2
Not used Short 3 - 4
- Capacitor CA
- Capacitor CB
- Solder kit
JP8