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Distributor of Equinox Technologies: Excellent Integrated System Limited
Datasheet of ISPNANO S3 KIT - ISP PORTABLE PROGRAMMER
Contact us: [email protected] Website: www.integrated-circuit.com
ISPnano Series Programmer - User Manual – V1.11 – 12
th
May 2011
88
1.4 Atmel AVR microcontroller - JTAG connections
The table below details the connections for programming Atmel AVR microcontrollers via the JTAG
Interface.
TCK
TDI
TDO
TMS
Vcc
Vss
RESET
PROG_RESET
PROG_TCK
PROG_TDI
PROG_TDO
PROG_TMS
Atmel
ATmega
Microcontroller
PROG_VCC
PROG_GND
Reset
Circuit
J
T
A
G
P
O
R
T
Pin
No
Programmer
Pin name
Programmer
Input /
Output
Connect to
pin on
Target System
Notes
1 + 2
TARGET_VCC
P
TARGET_VCC
Target VCC
3 + 4
TARGET_EXT_VCC P
See notes.
Target External VCC
5 + 6
PROG_GND
P
Signal GROUND
(0V)
Signal Ground Connection
10
Programmer I/O5
I/O
Spare I/O
11
Programmer I/O4
I/O
JTAG – TMS
12
Programmer I/O3
I/O
JTAG - TCK
13
Programmer I/O2
I/O
JTAG - TDO
14
Programmer I/O1
I/O
JTAG - TDI
16
PROG_RESET
O
RESET
Target RESET control pin
Please refer to Application Note AN105 for detailed instructions of how to program an Atmel AVR
microcontroller via the JTAG interface.
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