Hi all i need watchdog timer example for 89C51RD2,so that code execution can start from beginning regards. arjun arjun_ram_pal@rediffmail.com
while similar, the P89C51RD2 and the T89C51RD2 are not identical, please be specific. Erik
it is P89C51RD2,i went through the application notes,in this watch dog has to be loaded with 0x1e,0xe1 sequence to feed watch dog, what about T89C51RD2 ?
you got it right re the P89.. . Re the t89... I do not know, just know from a check a while ago that the chips are similar, not identical. I do not actually know if the p89 requires this, but as a carryover from a former chip that did, I always disable interrupts before the 2 writes and reenable afterwards. This guarantees that the two writes are consequtive and even if the p89 should not require it, the code becomes portable to a chip that does. Erik