|
А в каком у вас состоянии Fuse бит RSTDISBL? 1.8В точно не должно быть, если он используется как Reset.
Из datasheet ATtiny15 (стр. 52, 54):
--------------------------------------------------
• RESET – PORT B, Bit 5
When the RSTDISBL Fuse is unprogrammed, this pin serves as External Reset. When
the RSTDISBL Fuse is programmed, this pin is a general input pin or a open-drain out-put
pin. If DDB5 is cleared (zero), PB5 is configured as an input pin. If DDB5 is set
(one), the pin is a open-drain output.
----------------------------------------------
The ATtiny15L has six Fuse bits (BODLEVEL, BODEN, SPIEN, RSTDSBL, and
CKSEL1..0). All the Fuse bits are programmable in both High-voltage and Low-voltage
Serial Programming modes. Changing the Fuses does not have effect while in program-ming
mode.
----------------------------------------------
• When the RSTDISBL Fuse is programmed “0”, the External Reset function of pin
PB5 is disabled (1) . Default value is unprogrammed “1”. Programming this fuse while
in the Low-voltage Serial Programming mode will disable future In-System
downloading attempts.
-----------------------------------------------
E-mail: info@telesys.ru