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R0E00008AKCE00EP52 Datasheet, PDF (22/43 Pages) Renesas Technology Corp – Microcomputer Development Environment System | |||
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E8a Emulator
4. Examples of Pin Handling for Connecting the E8a
Vcc
SCLK
RxD
TxD
BUSY
EPM
CE
Pulled up at 4.7k⦠to 22kâ¦
Vcc Vcc Vcc Vcc Vcc
Pulled up at 4.7k⦠or more
P45 [*1]
P46
P47
P44 [*1]
P55 [*2]
P50 [*3]
MCU
CNVss
Vcc
CNVss
RESET#
User
*
logic
RESET#
Vss
Pulled up at
4.7k⦠or more
E8a Connecting
Connector
Pulled down at
4.7k⦠or more
*: Open-collector buffer
User system
Figure 4.18 Example of an E8a Connection
(Memory Expansion Mode, R32C/160 and R32C/161 Only)
Notes
[*1] For details on setting pins P44 and P45, refer to â4.3.1 (1) SCLK, RxD, TxD and BUSY pinsâ on page 23.
[*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 âHâ 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
Page 22 of 43
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