IE-789418-NS-EM1 Renesas Electronics America, IE-789418-NS-EM1 Datasheet - Page 22

• Manufacturer Part Number: IE-789418-NS-EM1
• Description: BD EMULATOR 78K0S UPD78940X/41X
• Manufacturer: Renesas Electronics America

Specifications of IE-789418-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) 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 3-2.
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.
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 3-2.
20
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 (3) Pulse input from target system. For an external clock,
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).
(a) Clock oscillator
Figure 3-2. External Circuits Used as System Clock Oscillator
X1
X2 or XT2
V
Target device
SS
CHAPTER 3 INSTALLATION
User’s Manual U14364EJ3V0UM
External
clock
(b) External clock
X1 or XT1
X2 or XT2
Target device