IE-789835-NS-EM1 Renesas Electronics America, IE-789835-NS-EM1 Datasheet - Page 25

• Manufacturer Part Number: IE-789835-NS-EM1
• Description: BD EMU 78K0S UPD789832/33/34/35
• Manufacturer: Renesas Electronics America

Specifications of IE-789835-NS-EM1

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

3.4 Clock Settings
3.4.1 Overview of clock settings
(1) Clock that is already mounted on emulation board
(2) Clock that is mounted by user
(3) Pulse input from target system
board or (2) Clock that is mounted by user. For a clock oscillator, a resonator is connected to the target device
and the target device’s internal oscillator is used. An example of the external circuit is shown in part (a) of Figure 3-5.
During emulation, the oscillator that is mounted on the target system is not used. Instead, the clock that is mounted
on the emulation board installed for the IE-78K0S-NS or IE-78K0S-NS-A is used.
(2) Clock that is mounted by user, or (3) Pulse input from target system. For an external clock, a clock signal is
supplied from outside the target device and the target device’s internal oscillator is not used. An example of the
external circuit is shown in part (b) of Figure 3-5.
The main system and subsystem clocks to be used during debugging can be selected from (1) to (3) below.
If the target system includes a clock oscillator, select either (1) Clock that is already mounted on emulation
If the target system includes an external clock, select (1) Clock that is already mounted on emulation board,
Caution
using the RC oscillator is not possible. Moreover, be sure to input a rectangular wave as the
clock from the target. However, there is no need to supply clocks to the X2 and XT2 pins. The
IE system does not operate if a crystal resonator or ceramic resonator is directly connected to
the X1 or XT1 pin.
The IE system will be hung-up if the main system clock is not supplied normally. Emulating
Crystal resonator
or
ceramic oscillator
(a) Clock oscillator
Figure 3-5. External Circuits Used as System Clock Oscillator
V
X1 or XT1
X2 or XT2
Target device
SS
CHAPTER 3 INSTALLATION
User’s Manual U16290EJ1V0UM
External
clock
(b) External clock
X1 or XT1
X2 or XT2
Target device
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