Rainbow Electronics ATmega162V - Manual (Page 45)

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ATmega162/V
2513E–AVR–09/03
the logic level, power consumption will increase. Note that the TDI pin for the next
device in the scan chain contains a pull-up that avoids this problem. Writing the JTD bit
in the MCUCSR register to one or leaving the JTAG fuse unprogrammed disables the
JTAG interface.