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ATmega165 Datasheet(PDF) 269 Page - ATMEL Corporation

No. de pieza ATmega165
Descripción Electrónicos  8-bit Microcontroller with 16K Bytes In-System Programmable Flash
PDF  336 Pages
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Fabricante Electrónico  ATMEL [ATMEL Corporation]
Página de inicio  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega165 Datasheet(HTML) 269 Page - ATMEL Corporation

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ATmega165/V
2573G–AVR–07/09
Reset Register
The Reset Register is a Test Data Register used to reset the part during programming. It
is required to reset the part before entering Programming mode.
A high value in the Reset Register corresponds to pulling the external reset low. The
part is reset as long as there is a high value present in the Reset Register. Depending
on the Fuse settings for the clock options, the part will remain reset for a Reset Time-out
period (refer to “Clock Sources” on page 24) after releasing the Reset Register. The out-
put from this Data Register is not latched, so the reset will take place immediately, as
shown in Figure 100 on page 213.
Programming Enable Register
The Programming Enable Register is a 16-bit register. The contents of this register is
co mp are d
to
the
p r og ra mm ing
en ab le
s i g n a t ur e,
bina ry
cod e
0b1010_0011_0111_0000. When the contents of the register is equal to the program-
ming enable signature, programming via the JTAG port is enabled. The register is reset
to 0 on Power-on Reset, and should always be reset when leaving Programming mode.
Figure 123. Programming Enable Register
TDI
TDO
D
A
T
A
=
DQ
ClockDR & PROG_ENABLE
Programming Enable
0xA370



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