R0E00008AKCE00EP52 Datasheet, PDF (11/43 Pages) Renesas Technology Corp – Microcomputer Development Environment System

E8a Emulator
4. Examples of Pin Handling for Connecting the E8a
Vcc
SCLK
RxD
TxD
BUSY
EPM
CE
Pulled up at 4.7kΩ to 22kΩ
Vcc Vcc Vcc Vcc Vcc
Pulled up at 4.7kΩ or more
P65 [*1]
P66
P67
P64 [*1]
P55 [*2]
P50 [*3]
MCU
CNVss
Vcc
CNVss
RESET#
User
*
logic
RESET#
Vss
Pulled up at
4.7kΩ or more
E8a Connecting
Connector
Pulled down at
4.7kΩ or more
*: Open-collector buffer
User system
Figure 4.2 Example of an E8a Connection
(Single Power Supply and Memory Expansion Mode, MCUs Other Than R32C/160 and R32C/161)
Notes
[*1] For details on setting pins P64 and P65, refer to “(1) SCLK, RxD, TxD and BUSY pins” on page 14.
[*2] The HOLD# signal cannot be used. Pull up P55 on the user system.
[*3] P50 is used as the WRL#/WR# pin. The E8a emulator outputs “H” to the CE pin when going to boot mode
(resetting the MCU). In other cases, the CE pin is in a Hiz state. This prevents signal collision between the E8a
emulator and the MCU. The WRL#/WR# pin does not affect the memory because the pin has a low active signal.
REJ10J1877-0201 Rev.2.01 Jun. 26, 2009
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