Interface Masters TAHOE 8724 User manual
TAHOE 8724 User Guide
Rev: 01
8/10/2017
Page 1 OF 45
Interface Masters Technologies Inc. Confidential & Proprietary
User Guide
TAHOE 8724
TAHOE 8724 User Guide
Rev: 01
8/10/2017
Page 2 OF 45
Interface Masters Technologies Inc. Confidential & Proprietary
TABLE OF CONTENTS
1 INTRODUCTION ............................................................................................................... 6
1.1 STANDARD FEATURES................................................................................................ 6
1.2 FUNCTIONAL DIAGRAM................................................................................................... 7
1.3 PHYSICAL LAYOUT FOR SYSTEM....................................................................................... 9
2 MAJOR COMPONENTS............................................................................................... 12
2.1 CN78XX PROCESSOR.............................................................................................. 12
2.1.1 CN78XX Processor Overview ........................................................................... 12
2.1.2 DDR (LMC)....................................................................................................... 13
2.1.3 SPI ..................................................................................................................... 14
2.1.4 eMMC/SD.......................................................................................................... 15
2.1.5 Boot Bus............................................................................................................. 16
2.1.6 SERDES (QLMs)............................................................................................... 17
2.1.7 I2C (TWSI)......................................................................................................... 18
2.1.8 UART................................................................................................................. 19
2.1.9 USB 3.0.............................................................................................................. 20
2.1.10 MDIO (SMI)................................................................................................... 21
2.1.11 MANAGEMENT PORT ................................................................................................ 22
2.2 CPLD .................................................................................................................... 24
2.2.1 CPLD Overview ............................................................................................... 24
2.2.2 Power Sequencing Control................................................................................ 25
2.2.3 Access Interface................................................................................................. 25
2.2.4 LED Control...................................................................................................... 26
2.2.5 Boot Devices...................................................................................................... 27
2.3.5 Selecting Boot Device........................................................................................ 27
2.4 CS4318 –QUAD RXAUI TO SFI PHY..................................................................... 28
2.5 VSC8221 –SINGLE PORT SGMII TO 1GBASE-T PHY ............................................ 29
2.6 PEX8724 –PCI-E GEN3SWITCH............................................................................ 30
2.7 PCI-E M.2 SSD...................................................................................................... 31
2.8 SERIAL INTERFACE .................................................................................................. 31
3 I2C PERIPHERALS...................................................................................................... 32
3.1 I2C BUS 0PERIPHERALS............................................................................................... 32
3.1.1 DDR4 SPD......................................................................................................... 32
3.2 I2C BUS 1PERIPHERALS ......................................................................................... 33
3.2.2 ADM1032ARZ - Temperature Sensor ............................................................... 33
3.2.3 MCP7940N - Real Time Clock.......................................................................... 33
3.2.4 EEPROM........................................................................................................... 33
4 I/O MODULES.............................................................................................................. 34
TAHOE 8724 User Guide
Rev: 01
8/10/2017
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Interface Masters Technologies Inc. Confidential & Proprietary
4.1 TM13233 I/O MODULE .......................................................................................... 34
4.2 TM13238 I/O MODULE................................................................................................ 35
5 POWER SUPPLY.............................................................................................................. 36
5.1 POWER CONSUMPTION............................................................................................ 36
6 COOLING FAN............................................................................................................. 37
7 ENCLOSURE................................................................................................................ 38
7.1 ENCLOSURE DIMENSION.......................................................................................... 38
7.2 MOUNTING EARS..................................................................................................... 38
7.3 SLIDING GUIDES ..................................................................................................... 39
8 CUSTOMER SUPPORT ............................................................................................... 40
8.1 TECHNICAL ASSISTANCE .......................................................................................... 40
8.2 LIFE SUPPORT POLICY ............................................................................................ 40
8.3 WARRANTY.............................................................................................................. 41
9 ORDERING PART NUMBER....................................................................................... 42
9.1 SYSTEM ORDERING PART NUMBER.................................................................................. 42
9.2 STANDARD CONFIGURATIONS........................................................................................ 43
9.3 MODULE PART NUMBERS......................................................................................... 44
9.4 ACCESSORIES PART NUMBERS.................................................................................. 44
9.5 TRANSCEIVERS ........................................................................................................ 45
TAHOE 8724 User Guide
Rev: 01
8/10/2017
Page 4 OF 45
Interface Masters Technologies Inc. Confidential & Proprietary
TABLE OF FIGURES
Figure 1, TAHOE 8724 Block Diagram................................................................................ 8
Figure 2, 3D Image of TAHOE 8724 with Top view............................................................. 9
Figure 3, 3D Image of TAHOE 8724 with Front View........................................................ 10
Figure 4, 3D Image of TAHOE 8724 with Rear View......................................................... 10
Figure 5, 3D Image of TAHOE 8724 with cover off............................................................ 11
Figure6, DDR(LMC) Block Diagram.................................................................................. 13
Figure 7, SPI Block Diagram.............................................................................................. 14
Figure 8, eMMC Block Diagram......................................................................................... 15
Figure 9, Boot Bus Interface................................................................................................ 16
Figure 10, I2C TWSI Block Diagram.................................................................................. 18
Figure 11, UART Signals to RJ45 ....................................................................................... 19
Figure 12, USB 3.0 Type- A Block Diagram....................................................................... 20
Figure 13, MDIO(SMI) Block Diagram .............................................................................. 21
Figure 14, Management Port............................................................................................... 22
Figure 15, Console Port ...................................................................................................... 23
Figure 16, TAHOE 8724 CPLD Functional Diagram ........................................................ 24
Figure 17, LED Control....................................................................................................... 26
Figure 18, CS4318 RXAUI TO SFI PHY Block Diagram ................................................... 28
Figure 19, Single Port SGMII to 10/100GBASE-T PHY Diagram...................................... 29
Figure 20, PCI-e Gen3 Switch Diagram............................................................................. 30
Figure 21, I2C Peripherals Diagram.................................................................................. 32
Figure 22, TM13233 I/O Module Block Diagram............................................................... 34
Figure 23, TM13238 I/O Module Block Diagram............................................................... 35
Figure 24, Cooling Fan Functional Diagram..................................................................... 37
Figure 25, Mounting Ears of TAHOE 8724 ........................................................................ 38
Figure 26, Sliding Guides of TAHOE 8724......................................................................... 39
TAHOE 8724 User Guide
Rev: 01
8/10/2017
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Interface Masters Technologies Inc. Confidential & Proprietary
TABLE OF Tables
Table 1, Console Port Setting…………………………………………………………………….. 23
Table 2, Boot Device Register……………………………………………………………………. 27
Table 3, Boot Device Bits…………………………………………………………………………. 27
Table 4, Input Power Supply……………………………………………………………………… 36
Table 5, Output Power Supply……………………………………………………………………. 36
Table 6, Dimension of Enclosure………………………………………………………………… 38
Table 7, Ordering Part Numbers………………………………………………………………… 42
TAHOE 8724 User Guide
Rev: 01
8/10/2017
Page 6 OF 45
Interface Masters Technologies Inc. Confidential & Proprietary
1 Introduction
The TAHOE 8724, a highly flexible 1U networking appliance designed for
enterprise Market. TAHOE 8724 is based on Cavium 64-bit MIPS technology.
1.1 Standard Features
TAHOE 8724 is 1U appliance based on the Cavium CN78xx processor.
It provides the following external interfaces:
❖Four 1G/10G SFP+ ports
❖One 10/100/1000 BASE-T RJ45 management port
❖One RJ45 console port
❖One USB 3.0 Host port
❖One SD card slot
❖Two hot-swap power supply bays for redundancy
❖Two hot-swap I/O module bays supporting 8x 1G/10G SFP+ ports or 2x 40G
QSFP ports
TAHOE 8724 User Guide
Rev: 01
8/10/2017
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Interface Masters Technologies Inc. Confidential & Proprietary
Internally, the system provides:
➢Four DDR4 SODIMM sockets
➢eMMC flash (4GB)
➢Two M.2 PCI-e SSD (1TB)
➢SPI flash
➢An I2C TPM module for system authentication
➢An I2C RTC module for time keeping
➢An I2C EEPROM for parameter storage
➢I2C temperature sensors for board and CPU junction
➢A fan control module supporting up to 4 hot-pluggable dual-stack fans, each
speed-controllable via two I2C-connected ADT7470 fan controllers.
1.2 Functional Diagram
The below block diagram is for TAHOE 8724 Board.
TAHOE 8724 User Guide
Rev: 01
8/10/2017
Page 8 OF 45
Interface Masters Technologies Inc. Confidential & Proprietary
Figure 1, TAHOE 8724 Block Diagram
TAHOE 8724 User Guide
Rev: 01
8/10/2017
Page 9 OF 45
Interface Masters Technologies Inc. Confidential & Proprietary
1.3 Physical Layout for System
Figure 2, 3D Image of TAHOE 8724 with Top view
TAHOE 8724 User Guide
Rev: 01
8/10/2017
Page 10 OF 45
Interface Masters Technologies Inc. Confidential & Proprietary
Figure 3, 3D Image of TAHOE 8724 with Front View
Figure 4, 3D Image of TAHOE 8724 with Rear View
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