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Programming command register, Atmega169v/l – Rainbow Electronics Atmega169L User Manual

Page 287

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287

ATmega169V/L

2514A–AVR–08/02

Programming Command
Register

The Programming Command Register is a 15-bit register. This register is used to seri-
ally shift in programming commands, and to serially shift out the result of the previous
command, if any. The JTAG Programming Instruction Set is shown in Table 132. The
state sequence when shifting in the programming commands is illustrated in Figure 133.

Figure 132. Programming Command Register

TDI

TDO

S

T

R

O

B

E

S

A

D

D

R

E

S

S

/

D

A

T

A

Flash

EEPROM

Fuses

Lock Bits