Datasheet
198
ATmega323(L)
1457E–11/01
Figure 101. Programming Enable Register
Programming Command
Register
The Programming Command register is a 15 bit register. This register is used to serially
shift in programming commands, and to serially shift out the result of the previous com-
mand, if any. The JTAG Programming Instruction Set is shown in Table 71. The state
sequence when shifting in the programming commands is illustrated in Figure 102.
Figure 102. Programming Command Register
TDI
TDO
D
A
T
A
=
DQ
ClockDR & PROG_ENABLE
Programming enable
$A370
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