ARM-JTAG-EW Olimex Ltd., ARM-JTAG-EW Datasheet - Page 4

• Manufacturer Part Number: ARM-JTAG-EW
• Description: Programmers & Debuggers HI SPEED ARM USB W/TARGET PWR 2-5V
• Manufacturer: Olimex Ltd.

Specifications of ARM-JTAG-EW

• Positions/sockets: 1
• Description/function: JTAG Probe
• Core Architecture: ARM
• Core Sub-architecture: ARM7, Cortex-M0, Cortex-M3
• Ic Product Type: Debugger
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: ARM MCUs
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 1701507 25R4408

2.3.
Providing Target Power Via JTAG Connector
By default ARM-JTAG-EW connects the USB supply voltage to pin 19 of
the JTAG connector via MOSFET switch. Depending on the current
consumption and the used USB host and hubs the supplied voltage can
vary between 4.0V and 5.25V.
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Pin
№
U
nTRST
GND
TDI
GND
TMS/
SWDIO
GND
TCK/
SWCLK
GND
RTCK
GND
TDO/
SWO
GND
nSRST
GND
NC
GND
U
GND
Signal Direc
TG,2
TGPWR
I
O
(open
drain)
-
O
-
O
-
O
-
I
-
I
-
O
(open
drain)
-
-
-
O
-
tion
it to the MCU supply line that drives the JTAG pins.
Input has resistance 4 kΩ.
Target board should connect it to the MCU supply
line that drives the JTAG pins.
Target JTAG TAP reset. ARM-JTAG-EW has 100 Ω
resistor in series with this output. Driven as open
drain output.
Ground.
Target JTAG Data IN. ARM-JTAG-EW has 100 Ω
resistor in series with this output.
Ground.
Target JTAG Mode Select and Serial Wire Data
Input/Output. ARM-JTAG-EW has 100 Ω resistor in
series with this output.
Ground.
Target JTAG clock and Serial Wire Clock. ARM-
JTAG-EW has 100 Ω resistor in series with this
output.
Ground.
Target JTAG return clock. ARM-JTAG-EW has 100
Ω resistor in series with this input.
Ground.
Target JTAG data output and Serial Wire Output.
ARM-JTAG-EW has 100 Ω resistor in series with
this input.
Ground.
Target system reset. ARM-JTAG-EW has 100 Ω
resistor in series with this output. Driven as open
drain output.
Ground.
Not connected in ARM-JTAG-EW.
Ground.
Target power supply voltage provided by ARM-JTAG-
EW. Supply is taken from USB and is switched by a
MOSFET
connected between this pin and ground.
Ground.
transistor.
Description
There
is
4
kΩ
resistor