R0E00008AKCE00EP38 Datasheet, PDF (12/35 Pages) Renesas Technology Corp – Microcomputer Development Environment System

E8a Emulator
4. Examples of Pin Handling for Connecting the E8a
(1) MODE pin
The E8a emulator uses the MODE pin for MCU control and forced break control. Pull up the E8a emulator and
MCU pins and connect the E8a emulator.
E8a connecting
connector
MODE ⁷
Vcc
Pulled up at 4.7kΩ ± 10%
MODE MCU
Figure 4.2 E8a Emulator and MODE Pin Connection
(2) RESET# pin
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.
Vcc
E8a connecting
connector
RESET# ¹³
User
logic
*
RESET# _MCU
Pulled up at 4.7kΩ or more
* : Open-collector buffer
Figure 4.3 Example of a Reset Circuit
(3) Other pins
- Connect Vss and Vcc to the Vss and Vcc of the MCU, respectively.
- The amount of voltage input to Vcc must be within the specified range of the MCU.
- Pin 14 is used for checking the connection between the E8a and the user system, and pins 4, 6 and 10 are
connected to the internal circuit. These pins are not directly connected to the Vss inside the E8a.
- Make sure pins 2, 4, 6, 10, 12 and 14 are all connected to the Vss.
- Do not connect anything to the N.C. pin.
REJ10J1739-0200 Rev.2.00 Jul. 03, 2009
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