Section 4 Verifying Operation
1. When using the H8S/2556, H8S/2552, and H8S/2506 groups E6000 emulator, turn on the
emulator according to the procedures described in the H8S/2556, H8S/2552, and H8S/2506
groups E6000 Emulator User's Manual (HS2556EPI61HE).
2. Verify the user system interface cable connections by accessing the external memory and ports
to check the bus states of the pins. If an error is detected, recheck the soldered IC socket and the
location of pin 1.
3. The emulator connected to this user system interface cable supports two kinds of clock sources
as the MCU clock: an emulator internal clock and an external clock on the user system. For
details, refer to the H8S/2556, H8S/2552, and H8S/2506 groups E6000 Emulator User’s Manual
(HS2556EPI61HE).
To use the emulator internal clock
Select the clock in the emulator station with the [CLOCK] option in the [Configuration
Properties] dialog box.
To use the external clock on the user system
Select external clock (target or target/2) with the [CLOCK] option in the [Configuration
Properties] dialog box, and supply the external clock from the user system to the emulator.
Supply the external clock to the system clock by inputting the external clock from the
EXTAL terminal on the cable head or connecting a crystal oscillator to the EXTAL and
XTAL terminals. To supply the external clock to the subclock, connect the 32.768-kHz
crystal oscillator to the OSC1 and OSC2 terminals. For details, refer to section 21, Clock
Pulse Generator, in the H8S/2556, H8S/2552, and H8S/2506 groups Hardware Manual.
The user system interface cable has the oscillator circuits shown in figure 10. This circuit is
located on the lower board of the H8S/2556, H8S/2552, and H8S/2506 groups.
HCU04
HCU04
OSC1
OSC2
R6 2.2k
Ω
R7 10k
Ω
HD151015
FCT244 HD151015
System clock oscillator
Subclock oscillator
To E6000
emulator
R2 270
R1 1M
FCT244
HCU04
HCU04
EXTAL XTAL
R5 470k
R4 3.3M
HCU04
Ω
Ω
Ω
Ω
To E6000
emulator
Figure 10 Clock Oscillator Circuits
15
