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TAHOE 8622 User Guide
REV: 01
07/27/2017 PAGE 2 OF 37
TABLE OF CONTENTS
1.
INTRODUCTION ....................................................................................................................................... 5
1.1
P
RODUCT
D
ESCRIPTION
.................................................................................................................... 5
1.2
S
TANDARD
F
EATURES
........................................................................................................................ 5
1.3
F
UNCTIONAL
D
IAGRAM
..................................................................................................................... 7
1.4
P
HYSICAL
L
AYOUT FOR
S
YSTEM
........................................................................................................ 8
2.
CN68XX PROCESSOR ............................................................................................................................. 11
2.1
CN68XX
P
ROCESSOR
O
VERVIEW
.................................................................................................... 11
2.1.1
QLM Configuration .................................................................... Error! Bookmark not defined.
2.2
DDR3
DRAM
C
ONTROLLER
............................................................................................................. 12
2.3
E
MMC/SD
I
NTERFACE
..................................................................................................................... 13
2.4
B
OOT
B
US
......................................................................................................................................... 14
2.5
O
N
-
BOARD NETWORK INTERFACES
................................................................................................. 15
2.6
RGMII
M
ANAGEMENT
P
ORT
PHY ................................................................................................... 16
2.7
UART
I
NTERFACE
............................................................................................................................ 17
3.
USB 3.0 ..................................................................................................................................................... 18
4.
USB 2.0 ..................................................................................................................................................... 19
5.
ALTERA CPLD ......................................................................................................................................... 20
5.1
P
OWER
S
EQUENCING
C
ONTROL
..................................................................................................... 20
5.2
A
CCESS
I
NTERFACE
......................................................................................................................... 21
5.3
I2C
I
NTERFACE
................................................................................................................................ 21
5.4
SPI
I
NTERFACE
................................................................................................................................. 21
5.5
D
RIVE
LED
DATA STREAM
............................................................................................................... 21
6.
CONSOLE PORT ...................................................................................................................................... 22
7.
LED CONTROL ........................................................................................................................................ 23
7.1
P
OWER
LED
0 ................................................................................................................................... 23
7.2
P
OWER
LED
1 ................................................................................................................................... 23
7.3
S
TATUS
LED ..................................................................................................................................... 23
8.
BOOT DEVICES ....................................................................................................................................... 24
8.1
SPI
NOR
F
LASH
................................................................................................................................ 24
8.2
SD
CARD
........................................................................................................................................... 24
8.3
E
MMC ............................................................................................................................................... 24
8.4
S
ELECTING
B
OOT
D
EVICE
............................................................................................................... 25
9.
I/O MODULES ......................................................................................................................................... 26
9.1
I/O
M
ODULE ONE
............................................................................................................................. 27
9.2
I/O
M
ODULE TWO
............................................................................................................................ 28
10.
POWER ................................................................................................................................................. 29
10.1
P
OWER
C
ONSUMPTION
.................................................................................................................... 29
10.2
C
OOLING
F
AN
.................................................................................................................................. 30
11.
ENCLOSURE ........................................................................................................................................ 31
11.1
P
HYSICAL
D
IMENSIONS
................................................................................................................... 31