SH72544R Datasheet, PDF (15/56 Pages) Renesas Technology Corp – Microcomputer Development Environment System

Section 1 Connecting the Emulator with the User System
1.5 Recommended Circuit between the H-UDI Port Connector and the
MCU
1.5.1 Recommended Circuit (36-Pin Type)
Figure 1.5 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 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 1.5 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 1.5 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 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.
10. For the pin processing in cases where the emulator is not used, refer to the hardware
manual of the related MCU.
Rev. 2.00 Jun. 08, 2009 Page 9 of 46
REJ10J1941-0200