Atmel 6-Way Isp Header (Spi Interface) - Equinox Systems PPM3 Reference Manual

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Datasheet of EQ-IOCON-3 - MOD PPM3 CONN-3 I/O ATMEGA JTAG
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3.4 Atmel 6-way ISP Header (SPI Interface)

This connection method is suitable for interfacing the programmer to a Target System which features
the following:
•
Atmel 6-way IDC ISP Header
•
An Atmel device which features the 3-wire SPI + RESET Programming Interface
The 6-way IDC box header is the most compact header i.e. takes up least space on the Target
System and so is very popular for designs where PCB space is limited. Unfortunately, this connection
method does not have any pins spare for extra functionality such as the SCK2 Oscillator so it should
only be used if this functionality is not required.
To implement this connection method, simply plug a 6-way ISP cable (not supplied) into the 6-way
ISP header and plug the other end of the cable into the matching header on the Target System.
Pin Programmer
No Pin name
1 PROG_MISO
2 PROG_VCC
3 PROG_SCK1
4 PROG_MOSI
Figure 4.4.1 - Atmel 6-way IDC Header (J3) viewed from above
Warning!
Connecting to the wrong ISP Header may cause catastrophic
damage to the Programmer & Target System
Programmer Connect to
Input / pin on
Output Target Device
I MISO
(except for
ATmega103/128/64
– connect to TXD
pin instead)
P TARGET_VCC
O SCK
O MOSI
(except for
ATmega103/128/64
– connect to RXD
pin instead)
Description
Master In Slave Out
This is the SPI data input pin to the
programmer. This pin should be
connected to the MISO pin on the Target
Microcontroller.
Target Vcc
This pin should be connected to the
Target System Vcc. This voltage could be
used to power the programmer depending
on the settings of the power switch/jumper
on the programmer.
SPI Serial Clock Output
This is the SPI clock output signal.
Master Out Slave In
This is the SPI data output pin from the
programmer. This pin should be
connected to the MOSI pin on the Target
Microcontroller.