Renesas SH7210 Series Manual do Utilizador descarregar pdf (Página 26)

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

MCU

2.6.1 Recommended Circuit (36-Pin Type)

Figure 2.11 shows a recommended circuit for connection between the H-UDI and AUD port

connectors (36 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 (ASE mode)

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

Figure 2.11 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.

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. The AUD signals (AUDCK, AUDATA3 to AUDATA0, and _AUDSYNC) operate in

high speed. Isometric connection is needed if possible. Do not separate connection nor

connect other signal lines adjacently.

6. Since the H-UDI and the AUD of the MCU operate with the PVcc, supply only the

PVcc to the UVCC pin.

7. The resistance values shown in figure 2.11 are for reference.

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

manual of the related MCU.

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