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E8a Emulator Section 5 Examples of E8a Connections

(2) In memory expansion mode

Figure 5.5 Connection of E8a Emulator and Pins P50 and P55 (Memory Expansion Mode)

Note:

1. The HOLD

signal cannot be used. Pull up P55 at the Vcc level on the user system.

3. The E8a emulator uses the CNVss pin for MCU control. Pull down the E8a emulator and MCU pins and connect the

E8a emulator.

Figure 5.6 E8a Emulator and CNVss Pin Connection

4. The RESET

pin is used by the E8a emulator. Therefore, use an open-collector output buffer or a CR reset circuit as

the reset circuit for the user system. The recommended pull-up value is 4.7 kΩ or more. The MCU can be reset by

outputting “L” from the E8a emulator. However, if the reset IC output is “H”, the user system reset circuit cannot be

set to “L”. As such, the E8a emulator will not operate normally.

Figure 5.7 Example of a Reset Circuit

REJ10J1639-0500

Rev.5.00 Page 8 of 23

RESET

Vcc

RESET

Pulled up at

4.7k

User system

connector

: Open-collector buffer

User

logic

M16C/30P

Apr.30.10

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