IE-780148-NS-EM1 Renesas Electronics America, IE-780148-NS-EM1 Datasheet - Page 20

• Manufacturer Part Number: IE-780148-NS-EM1
• Description: BOARD EMULATOR 78K0 UPD780148
• Manufacturer: Renesas Electronics America

Specifications of IE-780148-NS-EM1

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

3.2 Clock Settings
3.2.1 Overview of clock settings
be used during debugging can be selected from (1) to (3) below.
(1) Clock that is already mounted on emulation board
(2) Clock that is mounted by user
(3) Pulse input from target system
(4) Ring-OSC
board, (2) Clock that is mounted by user, or (4) Ring-OSC. For the 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 in the IE-78K0-NS or IE-78K0-NS-A is used.
board, (2) Clock that is mounted by user, (3) Pulse input from target system, or (4) Ring-OSC. For the external
clock, a clock signal is supplied from outside of 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.
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The main system clock to be used during debugging can be selected from (1) to (4) below. The subsystem clock to
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 either (1) Clock that is already mounted on emulation
Caution
The IE system will hang up if the main system clock is not supplied normally. Moreover, be
sure to input a rectangular wave as the clock from the target. There is no need to supply a
clock to the X2 and XT2 pins. Also, even if a crystal resonator is connected directly to X1 (for
the main system clock) or XT1 (for the subsystem clock), the target device will not operate.
Crystal or ceramic
resonator
(a) Clock oscillator
Figure 3-2. External Circuits Used as System Clock Oscillator
V
X1 or XT1
X2 or XT2
Target device
SS
CHAPTER 3 INSTALLATION
User’s Manual U16963EJ1V0UM
External
clock
(b) External clock
X1 or XT1
X2 or XT2
Target device