FS2003 ISP
Programmer - User Guide V1.07 – 1
st
September 2007
73
4.9 J8 - Atmel 10-way JTAG Header (JTAG Interface)
This connection method is suitable for interfacing the programmer to a Target System which features
the following:
•
An Atmel device which features a JTAG ISP port e.g. ATmega128 / 323 / 64
•
Atmel 10-way IDC JTAG Header
•
This is the same header as used on the Atmel JTAG-ICE emulator.
To implement this connection, simply plug the 10-way ISP cable into the
Programmer ISP Header J8
and plug the other end of the cable into the matching header on the Target System.
Figure 4.9.1 - Atmel 10-way IDC Header (J8) viewed from
above
Warning!
Connecting to the wrong ISP Header may cause
catastrophic damage to the Programmer & Target
System
Pin
No
Programmer
Pin name
Programmer
Input /
Output
Connect to
pin on
Target Device
Description
1 PROG_TCK O
TCK
JTAG TCK – Test Clock Signal pin
Clock signal from programmer to Target
Device JTAG port.
2 PROG_GND P
GROUND
Ground Connection
Common ground connection between
Programmer and Target System.
3 PROG_TDO I
TDO
JTAG TDO – Test Data Output pin
Data signal from Target device JTAG port
to programmer.
4 PROG_VCC P
TARGET_VCC
Target Vcc Connection
- Pins 4 + 7 are physically connected
inside the programmer.
- Connects to Vcc rail of Target System.
- Pin referred to as VTref on Atmel JTAG-
ICE.
5 PROG_TMS O
TMS
JTAG TMS – Test Mode Select pin
Mode Select Signal from
programmer to
Target Device JTAG port.
6 PROG_RESET
O
RESET
Microcontroller RESET control signal
This pin connects to the main RESET pin
of the Target Microcontroller. This pin is
not strictly needed for JTAG programming,
but it can be used to RESET the Target
Device before and after programming.
