User`s manual

SuperH™ Family E10A-USB Emulator Section 1 Connecting the Emulator with the User System
REJ10J1941-0300 Rev. 3.00 Page 11 of 46
Aug 25, 2010
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 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 1.6 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. Since the H-UDI of the MCU operates 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).
6. The resistance value shown in figure 1.6 is for reference.
7. For the pin processing in cases where the emulator is not used, refer to the hardware
manual of the related MCU.