Equinox 10-Way Header (Uart Boot Loader) - 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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3.7 Equinox 10-way Header (UART Boot Loader)

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 Wireless T89C51Rx2 / CC01 microcontroller
•
A Philips P89C51Rx2 or P89C66x microcontroller
•
The relevant connections for in-system programming via the Boot Loader.
To implement this connection, simply plug the 10-way ISP cable into the ISP header marked 'Equinox'
and plug the other end of the cable into the matching header on the Target System.
Please note:
The programmer interfaces to the Target System at TTL voltage levels. If the serial port to your Target
System is RS-232, you will need to convert the TTL levels from the programmer to RS-232 using an
external converter.
Pin Programmer
No Pin name
1 PROG_VCC
2 N/C
3 PROG_PSEN
4 PROG_TXD
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
2. Connecting to the wrong ISP Header may cause
Programmer Connect to
Input / Output pin on
Target Device
P TARGET_VCC Target Vcc
- N/C
O PSEN
O RXD
connector when programming ATtiny11/12/15
devices.
catastrophic damage to the Programmer & Target
System
Description
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.
Not connected
PSEN pin
This pin is driven LOW by the programmer
to enter 'Boot Loader' programming mode.
Programmer RXD (Transmit) pin
The programmer transmits serial data on
this pin to the Target Device RXD
(Receive) pin.