E1 Datasheet, PDF(17/50 Page) Renesas Technology Corp

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E1 Datasheet, PDF (17/50 Pages) Renesas Technology Corp – E1/E20 Emulator

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E1/E20 Emulator

Designing the User System

2.4. Recommended Circuit between the Connector and the MCU

This section shows recommended circuits for connection between the connector and the MCU when the E1 or E20

emulator is in use. For processing of signals, refer to section 2.5, Notes on Connection.

2.4.1. JTAG Interface Connection (RX610 Group) between the 14-pin connector

Figure 2.6 shows a recommended circuit for connection between the 14-pin connector and the RX610 Group

MCUs in JTAG Interface Connection.

Figure 2.7 shows a recommended circuit for connection between the 14-pin connector and an RX610-group MCU

when programming software is used.

For RX610-group MCUs, the pin assignment in the 14-pin connector differs between when debugging is executed

and when the flash memory is programmed using programming software. To execute both debugging and flash

programming for an RX610-group MCU, two 14-pin connectors are required.

Pulled-up at 4.7kÎ© to 10 kÎ©

14-pin

2.54-mm pitch

connector

Vcc Vcc

VCC 8

Vcc Vcc

TCK 1

TRST# 3

TDO 5

TMS 9

TDI 11

RES#

Pulled-down

at 4.7kÎ© to 10 kÎ©

TCK

TRST#

TDO

TMS

TDI

RES#

MCU

MD1 7

MD0 10

EMLE 4

Reset

circuit

Open-collector

buffer*2

Circuit for

selection of the

operating mode

MD1*1

MD0*1

EMLE*1

2,12,14

GND

Not

connected

Figure 2.6 Recommended Circuit for Connection between the 14-Pin Connector and the RX610

Group MCUs in JTAG Interface Connection

Notes: 1. For processing of signals MD0, MD1 and EMLE, refer to section 2.5, Notes on Connection.

2. The output of the reset circuit of the user system must be open collector.

If the hot plug-in facility is to be used, connection to the emulator must be with the TRST# and EMLE signals for

the emulator at the low and high levels, respectively, when power is supplied to the user system (at the time of a

system reset). Ensure that a ceramic capacitor (approx. 0.1 ÂµF) is installed between the RES# pin and GND and

the TRST# signal is pulled down, and include circuitry which can switch the EMLE signal to the high or low level.

R20UT0399EJ0700 Rev.7.00

Feb 01, 2014

Page 17 of 50

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