User`s manual

1.5.2 Recommended Circuit (14-Pin Type)

Figure 1.6 shows a recommended circuit for connection between the H-UDI port connector (14

pins) 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 _ASEMD pin must be 0 when the emulator is connected and 1 when the emulator

is not connected, respectively.

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

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

Figure 1.6 shows an example of circuits that allow the _ASEMD pin to be GND (0)

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

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

this pin to the _ASEMD 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. Since the H-UDI of the MCU operates with the PVcc, supply only the PVcc 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 1.6 is for reference.

7. The _TRST pin must be at the low level for a certain period when the power is

supplied whether the H-UDI is used or not.

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

manual of the related MCU.