User`s manual

1.5 Recommended Circuit between the H-UDI Port Connector and the

MCU

1.5.1 Recommended Circuit (14-Pin Type)

Figure 1.2 shows a recommended circuit for connection between the H-UDI port connector and

the MCU when the emulator is in use.

Notes: 1. Do not connect anything to the N.C. pins of the H-UDI port connector.

2. The _ASEMD0 pin must be 0 when the emulator is connected and 1 when the

emulator is not connected, respectively.

(1) When the emulator is used: _ASEMD0 = 0

(2) When the emulator is not used: _ASEMD0 = 1

Figure 1.2 shows an example of circuits that allow the _ASEMD0 pin to be GND (0)

whenever the emulator is connected by using the user system interface cable.

When the _ASEMD0 pin is changed by switches, etc., ground pin 9. Do not connect

this pin to the _ASEMD0 pin.

3. When a network resistance is used for pull-up, it may be affected by a noise. Separate

TCK from other resistances.

4. The pattern between the H-UDI port connector and the MCU must be as short as

possible. Do not connect the signal lines to other components on the board.

5. Supply the operating voltage of the H-UDI of the MCU to the UVCC pin. Make the

emulator’s switch settings so that the user power will be supplied (SW2 = 1 and SW3

= 1).

6. The resistance value shown in figure 1.2 is for reference.

7. For the pin processing in cases where the emulator is not used, refer to the hardware

manual of the related MCU.