short note:
adapted from http://web.archive.org/web/20070312171005/http://www.rentron.com/at89c205.htm
http://web.archive.org/web/20070310045421/http://www.rentron.com/clock-sch.htm schematic
schematic
ds1307 ds89c450 lcd clock (.PDF)
source work in progress (ASM- compiled with
ASM51 )
MOD51 includes
The 8051 Microcontroller and Embedded Systems Using Assembly and C ( PDFDrive.com ).pdf
http://www.microdigitaled.com/8051/Code/8051_codes.htm
blink.asm test program with one led blinking
same board working OK with atmel AT89C51
note it exists 2 types of AT89C51 : one with VPP=12Volts and tp=10ms and one with VPP=5V and tp=100µs
https://wiki.seeedstudio.com/High_Accuracy_Pi_RTC-DS3231/
at89c51.asm (update 01/05/24)
horloge6.pdf (40Kb) Atmel AT89C4051 6 digits
led display
*********
other resources :
https://www.eevblog.com/forum/microcontrollers/ds3231-rtc-module-drifting/
https://silanus.fr/bts/activites/raspberry/i2cRaspberryPi-SN2V1.html
https://www.ebay.fr/itm/256302770733
last update:
1 mai, 2024
