Renesas H8S/2636 Series Technical Information download pdf (Page 22)

Section 2 User System Interface

All user system interface signals are directly connected to the MCU in the E6000 with no buffering

except for those listed below which are connected to the MCU through control circuits:

• NMI

• RESET

•

MD2, MD1, MD0

•

XTAL

•

EXTAL

•

OSC1

•

OSC2

•

STBY

•

WAIT

2.1 Signal Protection

All user system interface signals are protected from over- or under-voltage by use of diode arrays

except for the AVcc and Vref.

The Vcc pins (except for the AVcc pin) at the head of the user system interface cable are

connected together. The E6000 monitors the voltage level of the Vcc pins and displays the power-

supply status in the Status Window.

2.2 User System Interface Circuits

The interface circuit between the MCU in the E6000 emulator and the user system has a signal

delay of about 8 ns due to the user system interface cable. And high-impedance signals will be

pulled up to the high level by pull-up resistors. When connecting the E6000 emulator to a user

system, adjust the user system hardware to compensate for propagation delays.

The following diagrams show the interface signal circuits

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Renesas H8S/2636 Series Technical Information Page 22