13

2314E–FPSLI–6/05

AT94S Secure Family

4.10

In-System Programming Applications

The AT94S Series Configurators are in-system (re)programmable (ISP). The example shown on

the following page supports the following programmer functions:

1.

Read the Manufacturer’s Code and the Device Code.

2.

Program the device.

3.

Verify the device data.

While Atmel’s Secure FPSLIC Configurators can be programmed from various sources (e.g., on-

board microcontrollers or PLDs), the applications shown here are designed to facilitate users of

our ATDH2225 Configurator Programming Cable. The typical system setup is shown in Figure 4-

2.

The pages within the configuration EEPROM can be selectively rewritten.

This document is limited to example implementations for Atmel’s AT94S application.

Figure 4-2.

Typical System Setup

The diode connection between the AT94S’ RESET pin and the SER_EN signal allows the exter-

nal programmer to force the FPGA into a reset state during ISP. This eliminates the potential for

contention on the cSCK line. The pull-up resistors required on the lines to RESET, CON and

INIT are present on the inputs (internally) to the AT94S FPSLIC, see Figure 4-3.

PC

Secure

FPSLIC

Target System

10-pin

Ribbon

Cable

Programming

Dongle

In-System

Programming

Connector

Header

ATDH2225

10

Secure

FPSLIC