eriktraedal / sst39sf040-avr

This is the avr-side of the SST39F040 flash programmer.

SST39SF040 Flash Programmer

Parts required to build this:

• One Arduino Uno
• Three 74HC595.
• One SST39SF040 or lower capacity versions.

Wiring

Connections

Arduino Uno	SST39SF040
A0	D0
A1	D1
A2	D2
A3	D3
A4	D4
5	D5
6	D6
7	D7
11	CE#
12	OE#
13	WE#

3x 74HC595 means that the pin from the Arudino Uno should be connected to all three shift registers.

Arduino Uno	3x 74HC595
9	Storage Register (STCP)
10	Serial Clock (SHCP)
5V	Master Reset (MR)
GND	Output Enable (OE)

Arduino Uno	74HC595 #1
2	Serial Input (DS)

Arduino Uno	74HC595 #2
3	Serial Input (DS)

Arduino Uno	74HC595 #3
4	Serial Input (DS)

74HC595 #1	SST39SF040
Q0	A0
Q1	A1
Q2	A2
Q3	A3
Q4	A4
Q5	A5
Q6	A6
Q7	A7

74HC595 #2	SST39SF040
Q0	A8
Q1	A9
Q2	A10
Q3	A11
Q4	A12
Q5	A13
Q6	A14
Q7	A15

74HC595 #3	SST39SF040
Q0	A16
Q1	A17
Q2	A18

Compiling

Note that I used avr-gcc instead of the Arduino IDE to compile this if you do not have avr-gcc it can be modified with ease just change int main() to void setup() and add void loop() {} at the bottom of the program and it will compile just fine in the Arduino IDE.

How to use this

Here is the part that runs on your computer I have only tested it on linux but I used a cross platform library so it may work on windows https://github.com/ComputerNerd/sst39sf040-computerside

Also my code can be easily adapted to run on the very similar lower capacity chips. The sst39sf020a and the sst39sf010a. Just change the main for loop to run for less bytes.