AT90USB1286-16MU ATMEL [ATMEL Corporation], AT90USB1286-16MU Datasheet - Page 348
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AT90USB1286-16MU
Manufacturer Part Number
AT90USB1286-16MU
Description
Microcontroller with 64/128K Bytes of ISP Flash and USB Controller
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT90USB1286-16MU.pdf
(434 pages)
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27.7
348
AT90USB64/128 Boundary-scan Order
AT90USB64/128
Table 27-3
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 pin-out order as far as possible. Therefore, the bits of Port A and Port Fis
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 regard-
less of which physical pin they are connected to. In
PXn. Control corresponds to FF1, PXn. Bit 4, 5, 6 and 7 of Port F is not in the scan chain, since
these pins constitute the TAP pins when the JTAG is enabled. The USB pads are not included in
the boundary-scan.
Table 27-3.
Bit Number
88
87
86
85
84
83
82
81
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
shows the Scan order between TDI and TDO when the Boundary-scan chain is
AT90USB64/128 Boundary-scan Order
Signal Name
PE6.Data
PE6.Control
PE7.Data
PE7.Control
PE3.Data
PE3.Control
PB0.Data
PB0.Control
PB1.Data
PB1.Control
PB2.Data
PB2.Control
PB3.Data
PB3.Control
PB4.Data
PB4.Control
PB5.Data
PB5.Control
PB6.Data
PB6.Control
PB7.Data
PB7.Control
PE4.Data
PE4.Control
PE5.Data
PE5.Control
Module
Port E
Port B
PORTE
Figure
27-3, PXn. Data corresponds to FF0,
7593A–AVR–02/06
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