atmega323l ATMEL Corporation, atmega323l Datasheet - Page 172

• Manufacturer Part Number: atmega323l
• Description: Atmega323 8-bit Avr Microcontroller With 32k Bytes Of In-system Programmable Flash
• Manufacturer: ATMEL Corporation

ATmega323 Boundary-
Scan Order
172
ATmega323(L)
Table 64 shows the Scan order between TDI and TDO when the Boundary-Scan chain
is selected as data path. Bit 0 is the LSB; The first bit scanned in, and the first bit
scanned out. The scan order follows the pinout order as far as possible. Therefore, the
bits of Port A is scanned in the opposite bit order of the other ports. Exceptions from the
rules are the Scan chains for the analog circuits, which constitute the most significant
bits of the scan chain regardless of which physical pin they are connected to. In Figure
89, PXn.Data corresponds to FF0, PXn.Control corresponds to FF1, and PXn.
Pullup_dissable corresponds to FF2. Bit 2, 3, 4, and 5 of Port C is not in the scan chain,
since these pins constitute the TAP pins when the JTAG is enabled
Table 58. ATmega323 Boundary-Scan Order
Bit Number
131
130
129
128
127
126
125
124
123
122
121
120
119
118
117
116
115
114
113
112
111
110
109
108
107
106
105
Signal Name
SIG_PRIVATE0
SIG_PRIVATE1
SIG_PRIVATE2
SIG_PRIVATE3
SIG_PRIVATE4
SIG_PRIVATE5
SIG_PRIVATE6
SIG_PRIVATE7
SIG_PRIVATE8
SIG_PRIVATE9
SIG_PRIVATE10
SIG_PRIVATE11
SIG_PRIVATE12
SIG_PRIVATE13
SIG_PRIVATE14
SIG_PRIVATE15
SIG_PRIVATE16
SIG_PRIVATE17
SIG_PRIVATE18
SIG_PRIVATE19
SIG_PRIVATE20
SIG_PRIVATE21
SIG_PRIVATE22
SIG_PRIVATE23
SIG_PRIVATE24
SIG_PRIVATE25
SIG_PRIVATE26
Module
Private Section 1
Private Section 2
1457G–AVR–09/03