Technical information

Section 2 Connecting the Emulator to the User System
Rev. 2.00 Feb. 18, 2009 Page 25 of 94
REJ10J1938-0200
2.6 Recommended Circuit between the H-UDI Port Connector and the
MCU
2.6.1 Recommended Circuit (36-Pin Type)
Figure 2.12 shows the recommended circuit for connection between the H-UDI and AUD port
connectors (36 pins) and the MCU, and figure 2.13 shows a recommended circuit for connection
between the H-UDI 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 1 when the emulator is connected and 0 when the emulator
is not connected, respectively.
(1) When the emulator is used: _ASEMD = 1 (ASE mode)
(2) When the emulator is not used: _ASEMD = 0 (normal mode)
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 Vcc, supply only the Vcc
to the UVCC pin.
7. The resistance values shown in figure 2.12 and figure 2.13 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.