R0E00008AKCE00EP52 Datasheet, PDF (16/43 Pages) Renesas Technology Corp – Microcomputer Development Environment System

E8a Emulator
4. Examples of Pin Handling for Connecting the E8a
3. Dual power supply and single-chip mode (R32C/111 (100-pin) Only)
Pull up P55 at the Vcc2 level or pull down it according to the MCU pin state after disconnecting the E8a emulator.
P55 may be in a Hiz state while the E8a emulator is active. Therefore, set the pin resistance value so the voltage
cannot be at the midpoint potential, depending on the voltage dividing of the resistance inside the E8a emulator
(Figure 4.24 on page 26).
Vcc2
E8a Connecting
Connector
4
EPM
CE
Pulled up at 4.7kΩ or more
P55/EPM
P50/CE
MCU
Figure 4.8 Connection of E8a Emulator and Pins P50 and P55
(Dual Power Supply and Single-chip Mode, R32C/111 (100-pin) Only)
4. Dual power supply and memory expansion mode (R32C/111 (100-pin) Only)
E8a Connecting
Connector
4
EPM
CE
Pulled up at
4.7kΩ to 22kΩ
Vcc2 Vcc2
Pulled up at 4.7kΩ or more
P55/EPM[*1]
P50/CE
MCU
Figure 4.9 Connection of E8a Emulator and Pins P50 and P55
(Dual Power Supply and Memory Expansion Mode, R32C/111 (100-pin) Only)
Note
[*1] The HOLD# signal cannot be used. Pull up P55 at the Vcc2 level on the user system.
REJ10J1877-0201 Rev.2.01 Jun. 26, 2009
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