ISPJUNO - Portable ISP Programmer - User Guide V0.84 – 17/04/20
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5.6 Equinox 10-way Header - Generic pin-out
This connection method is suitable for interfacing the programmer to a Target System which features
the following:
•
Equinox 10-way IDC ISP Header
•
An Atmel device which features the 3-wire SPI + RESET Programming Interface
This is the favoured ISP connector as it allows the following additional functions:
•
Application of +12V Vpp for ATtiny High Voltage Serial Programming
•
‘SCK2 Oscillator’
for clocking devices during programming
•
Spare I/O pin which could be used for
‘SPI SLAVE SELECT’
or to drive an LED on the Target
System
To implement this connection, simply plug the 10-way ISP cable into the
Programmer J6 header
and
plug the other end of the cable into the matching header on the Target System.
Figure 4.7.1 – Equinox 10-way IDC Header (J8) viewed from above
Warning!
1. It is possible for +12V to be output on pin 10 of this
connector when programming ATtiny11/12/15 devices.
2. Connecting to the wrong ISP Header may cause
catastrophic damage to the Programmer & Target
System
Pin
No
Programmer
Pin name
I/O
Connect to pin on
Target System
Notes
1
TARGET_VCC
P
TARGET_VCC
Target VCC
This pin should be connected to the
Target System Vcc.
2
BUFFER_ENABLE
IO5
Connect to Clock Buffer
circuit Buffer Enable pin
This pin is used to enable the
output of a remote Clock Buffer.
3
Programmer I/O4
IO4
•
JTAG – TMS
This pin is used for JTAG Target
Systems only.
4
Programmer I/O1
IO1
•
JTAG – TDI
•
SPI – MOSI
•
UART - TXD
This pin can be used for JTAG, SPI
or UART Target Systems.
5
RELAY ENABLE
O
Controlled output used to
switch external relay
Direct programmer output with 470
ohm resistor in series. Requires
external transistor to drive relay.
6
Programmer I/O2
IO2
•
JTAG – TDO
•
SPI – MISO
•
UART – RXD
•
PDI_RXD
This pin can be used for JTAG,
SPI, UART, XMEGA PDI and
ATtiny TPI Target Systems.
7 + 9
PROG_GND
P
Signal GROUND (0V)
Signal Ground Connection (1)
0V to which the programmer JTAG,
