R0E00008AKCE00EP52 Datasheet, PDF (15/43 Pages) Renesas Technology Corp – Microcomputer Development Environment System

E8a Emulator
4. Examples of Pin Handling for Connecting the E8a
(2) EPM# and CE# pins
The E8a emulator uses pins P50(CE#) and P55(EPM#) for MCU control.
Connect the E8a emulator to the MCU pins.
1. Single power supply and single-chip mode
For P50 and P55, pull up the pins at the Vcc level or pull down them according to the MCU pin state after
disconnecting the E8a emulator. P50 and 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).
E8a Connecting
Connector
4
EPM
7
CE
P55/EPM
P50/CE
MCU
Figure 4.6 Connection of E8a Emulator and Pins P50 and P55
(Single Power Supply and Single-chip Mode, MCUs Other Than R32C/160 and R32C/161)
2. Single power supply and memory expansion mode
Vcc Vcc
E8a Connecting
Connector
4
EPM
7
CE
Pulled up at
4.7kΩ to 22kΩ
Pulled up at 4.7kΩ or more
P55/EPM[*1]
P50/CE
MCU
Figure 4.7 Connection of E8a Emulator and Pins P50 and P55
(Single Power Supply and Memory Expansion Mode, MCUs Other Than R32C/160 and R32C/161)
Note
[*1] The HOLD# signal cannot be used. Pull up P55 at the Vcc level on the user system.
REJ10J1877-0201 Rev.2.01 Jun. 26, 2009
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