IE-780078-NS-EM1 Renesas Electronics America, IE-780078-NS-EM1 Datasheet - Page 20

• Manufacturer Part Number: IE-780078-NS-EM1
• Description: BOARD EMULATOR 78K0 UPD78007X
• Manufacturer: Renesas Electronics America

Specifications of IE-780078-NS-EM1

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3.2 Clock Settings
3.2.1 Overview of clock settings
(1) Clock that is already mounted on emulation board
(2) Clock that is mounted by user
(3) External clock
board or (2) Clock that is mounted by user. For an internal clock, a resonator is connected to the target device and
the target device’s internal oscillation circuit is used. An example of the external circuit is shown in part (a) of Figure
3-2. During emulation, the resonator that is mounted on the target system is not used. Instead, the clock that is
mounted on the emulation board connected to the IE-78K0-NS or IE-78K0-NS-A is used.
oscillation circuit is not used. An example of the external circuit is shown in part (b) of Figure 3-2.
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The main system and subsystem clocks to be used during debugging can be selected from (1) to (3) below.
If the target system includes an internal clock, select either (1) Clock that is already mounted on emulation
If the target system includes an external clock, select (3) External clock.
For an external clock, a clock signal is supplied from outside the target device and the target device’s internal
Caution The IE system will be hung-up if the main system clock is not supplied normally. Moreover, be
sure to input a rectangular wave as the clock from the target. The IE system does not operate if
the crystal resonator is connected to X1 (main system clock) and XT1 (subsystem clock).
Figure 3-2. External Circuits Used as System Clock Oscillation Circuit
(a) Internal clock
X1 or XT1
X2 or XT2
Target device
CHAPTER 3 INSTALLATION
User’s Manual U16226EJ3V0UM
External
clock
(b) External clock
X1 or XT1
X2 or XT2
Target device