Equinox 10-Way Header - Avr Spi Interface - Equinox Systems ISP juno User Manual

3.1 Equinox 10-way Header - AVR SPI Interface

This connection method is suitable for interfacing the programmer to a Target System which features
an 'Equinox 10-way' IDC connector with the Equinox pin-out.
Pin Programmer
No Pin name
1
TARGET_VCC
2 BUFFER_ENABLE
3 Programmer I/O4
4 Programmer I/O1
5 RELAY ENABLE
6 Programmer I/O2
7 + 9 PROG_GND
8 Programmer I/O3
10 PROG_RESET/VPP
Key
O - Output from programmer to Target Device
I - Input to programmer from Target Device
ISPJUNO - Portable ISP Programmer - User Guide V0.84 – 17/04/20
Figure 3.1- Equinox 10-way IDC Header (J7) viewed from above
Warning!
Connecting to the wrong ISP Header may cause
catastrophic damage to the Programmer & Target System
Connect to pin on
I/O
Target System
P TARGET_VCC
Connect to Clock Buffer
IO5
circuit Buffer Enable pin
No connect (N/C)
IO4
SPI – MOSI
IO1
Controlled output used to
O
switch external relay
IO2 SPI – MISO
P Signal GROUND (0V)
IO3 SPI - SCK
O RESET
Target VCC
This pin should be connected to the
Target System Vcc.
This pin is used to enable the
output of a remote Clock Buffer.
No connection for SPI
Direct programmer output with 470
ohm resistor in series. Requires
external transistor to drive relay.
Signal Ground Connection (1)
0V to which the programmer JTAG,
SPI, I2C signal lines are referenced
to.
SPI Clock
Target RESET control pin
This pin controls the Target Device
RESET pin.
P - Passive e.g. GROUND and power rails
N/C - Not connected
Notes
51