User`s manual

SuperH™ Family E10A-USB Emulator Section 1 Connecting the Emulator with the User System
REJ10J1941-0300 Rev. 3.00 Page 13 of 46
Aug 25, 2010
1.5.3 Recommended Circuit (38-Pin Type)
Figure 1.7 shows a recommended circuit for connection between the H-UDI and AUD port
connectors (38 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
(2) When the emulator is not used: ASEMD = 0
Figure 1.7 shows an example of circuits that allow the ASEMD pin to be changed by
switches, etc.
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. Make the emulator’s switch settings so that the user power will be
supplied (SW2 = 1 and SW3 = 1).
7. The resistance value shown in figure 1.7 is for reference.
8. For the AUDCK pin, guard the pattern between the H-UDI port connector and the
MCU at GND level.
9. The GND bus lead at the center of the H-UDI port connector must be grounded.
10. For the pin processing in cases where the emulator is not used, refer to the hardware
manual of the related MCU.