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E1 Datasheet, PDF (19/50 Pages) Renesas Technology Corp – E1/E20 Emulator
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E1/E20 Emulator
Designing the User System
2.4.2. JTAG Interface Connection (RX621, RX62N, RX62T, RX62G Groups) between the 14-pin
connector
Figure 2.8 shows a recommended circuit for connection between the 14-pin connector and the RX62T and RX62G
Group MCUs in JTAG Interface Connection.
Figure 2.9 shows a recommended circuit for connection between the 14-pin connector and the RX62T and RX62G
group MCUs (112-pin version) when programming software is used.
For RX62T and RX62G 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 the RX62T and RX62G group MCUs (112-pin version), two 14-pin connectors are
required.
Pulled-up at 4.7kΩ to 10 kΩ
14-pin
2.54-mm pitch
connector
Vcc Vcc
VCC 8
Vcc Vcc
TCK 1
TRST# 3
TDO 5
(RxD)*3
TMS 9
11
TDI
(TxD)*3
13
RES#
Pulled-down
at 4.7kΩ to 10 kΩ
TCK
TRST#
TDO/TxD1
TMS
TDI/RxD1
RES#
MCU
MD1 7
(io3)*3
MD0 10
(io2)*3
4
EMLE
Reset
circuit
Open-collector
buffer*2
Circuit for
selection of the
operating mode
MD1*1
MD0*1
EMLE*1
2,12,14
GND
Not
6
connected
Figure 2.8 Recommended Circuit for Connection between the 14-Pin Connector and the RX621,
RX62N, RX62T, RX62G Group MCUs in JTAG Interface Connection
Notes: 1.
2.
3.
For processing of signals MD0, MD1 and EMLE, refer to section 2.5, Notes on Connection.
The output of the reset circuit of the user system must be open collector.
The names in parentheses ( ) are pin names in the E1 and E20 14-pin connector when flash
memory is programmed using programming software. When programming flash memory, also
connect VCC, GND, and RES#.
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 µF) 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 19 of 50
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