:icons: font

= About

Instructions to download programs to (some) https://en.wikipedia.org/wiki/Intel_MCS-51[Intel MCS-51] compatible MCUs.

== Parts

=== AT89S51

NOTE: Same applies to AT89S52.

image::./fzz/at89s51_bb.png[A89S51]

=== STC89C51RC

NOTE: Same applies to STC89C52RC and STC12C5A6S2.

image::./fzz/stc89c51rc_bb.png[STC89C51RC]

== Dependencies

=== Hardware

==== AT89S51, AT89S52

https://www.arduino.cc/en/Main/Products[Arduino board] (e.g. Nano, Micro, etc.) -- 1 piece
Microcontroller -- 1 piece
Breadboard -- 2 pieces
Jumper wires -- ~20 pieces
LEDs -- 1 red, 1 green, 1 yellow, 1 white
1-10kΩ resistors -- 2 pieces
8-33MHz quartz crystal -- 1 piece
22pF capacitors -- 2 pieces
10-pin ribbon cable -- 1 piece
10-pin to 6-pin adapter -- 2 pieces
Push-button (NO) -- 1 piece

==== STC89C51RC, STC89C52RC, STC12C5A60S2

https://www.google.com/search?q=USB+to+TTL[USB to Serial/TTL adapter] (e.g. CH340G, PL2303, etc.) -- 1 piece
Microcontroller -- 1 piece
Breadboard -- 1 piece
Jumper wires -- ~10 pieces
LEDs -- 1 white
1-10kΩ resistors -- 1 pieces
8-33MHz quartz crystal -- 1 piece
22pF capacitors -- 2 pieces
Push-button (NO) -- 1 piece

=== Software

==== AT89S51, AT89S52

http://www.moravia-microsystems.com/mcu-8051-ide/[MCU 8051 IDE]
https://www.arduino.cc[Arduino IDE] -- 1.8.x or above should work
http://www.nongnu.org/avrdude/[avrdude] -- the Arduino IDE distribution contains a recent binary

IMPORTANT: Upload the ArduinoISP sketch onto the Arduino board.

==== STC89C51RC, STC89C52RC, STC12C5A60S2

== Programming

=== Compile binary

.Windows and Unix

mcu8051ide --no-bin --no-sim --assemble blink.asm

The output is blink.hex.

=== Downloading

==== AT89S51, AT89S52

==== STC89C51RC, STC89C52RC, STC12C5A60S2

<1> Executing this displays Waiting for MCU, please cycle power. Simply disconnect then reconnect VCC.