American Megatrends MegaRAC MG9070 User manual

© 2008 American Megatrends Inc. - Specifications subject to change without notice
Data Sheet
AMI’s MG9070 enclosure management controller can be utilized with both
SATA and SAS backplanes for applications from entry-level to mission-critical, while
providing a cost effective solution that does not require an expander. The chip imple-
ments Enclosure Management Protocol for supporting Promise SATA HBA as well
as SGPIO per SFF 8485 specification, managing LEDs for up to four drives.
AMI, who gained high reputation in the storage industry with RAIDs, works
with all the major HBA vendors to ensure compatibility.
MegaRAC MG9070 chip manages
hot-swap SAS/SATA-II backplanes with
enclosure management, ideal for cost-sen-
sitive and performance-oriented system
designs. The device is compatible with
adapters supporting Enclosure Manage-
ment Protocol for Promise SATA HBA
or SAS adapters with SGPIO interface.
Each MG9070 has one SGPIO port that
can communicate enclosure management
information to the SAS host bus adapter,
support LED management and detect
drive presence for up to four drives.
Serial Attached SCSI (SAS) and Seri-
al ATA are the latest storage interconnect
standards, introducing higher speeds,
more robust data integrity, smaller de-
signs and wider standardization. The SAS
interface is compatible with lower-cost-
HIGHLIGHTS
Supports up to 4 SAS/SATA drives
Drive Activity, Rebuild & Fail LEDs
Supports Ready LED Signal from
Drive
Manages drive presence
Global activity & Global Fail indica-
tion
SGPIO protocol support to interface
to SAS/SATA HBA
Enclosure Management Protocol
support for Promise HBA
Number of supported drives can
easily be increased by a factor of
4 by adding similar chips in case of
SGPIO interface
Support for maximum of 8 drives in
case of Promise protocol
Two SMBus ports and one SGPIO
port
>
>
>
>
>
>
>
>
>
>
4 30 2008
MegaRAC® MG9070
SAS/SATA Enclosure Management Controller
per-gigabyte SATA drives, giving system
builders the flexibility to integrate either
SAS or SATA devices while slashing the
costs associated with supporting two
separate interfaces. As the next genera-
tion of SCSI, SAS bridges the parallel
technology gap in performance, scal-
ability and affordability.
The SAS interface is designed to be
compatible with the Serial ATA (SATA)
interface at physical layer level. This al-
lows SAS or SATA drives to be plugged
into a SAS backplane, which reduces de-
sign and inventory costs for backplane
manufacturers.
A backplane required to support only
four drives can have just one MG9070.
By adding more devices, the backplane
can manage 8, 16 drives or more.
SGPIO Interface
(SAS)
I2C to
Promise HBA I2C
CPU
Drive
Presence
XTAL1
XTAL2
SDATAOUT SDATAIN SCLOCK SLOAD
SCL_HBA
SDA_HBA
SCL
SDA
GLOBAL_FAIL
GLOBAL_ACT
MB_ACT_IN#
MB ACT
RESET#
MATED1
MATED2
MATED3
MATED4
VCC
GND
GREEN1 GREEN2 GREEN3 GREEN4
Drive
Activity
LEDs
FAIL1
FAIL2
FAIL3
FAIL4
Drive
Fail
LEDs
Memory
Global ACT
& FAIL
LOGIC
MB ACT
LOGIC
Backplane_ID
Ready LED From
Drives
Ready
LED1
Ready
LED2
Ready
LED3
Ready
LED4

2/2
Features
American Megatrends Inc.
5555 Oakbrook Parkway - Suite 200
Norcross, GA 30093 | t: 770.246.8600
Sales & Product Information
[email protected] | t: 800.828.9264
Technical Support
[email protected] | t: 770.246.8645
www.ami.com
© 2008 American Megatrends Inc. - All Rights Reserved. Product Specifications Subject to Change without Notice
All Trademarks are Property of their Respective Owners
MegaRAC® MG9070
SAS/SATA Enclosure Management Controller
Supported Enclosure Management Protocol
SGPIO
One SGPIO port communicates enclosure man-
agement information, LED management and
drive presence for up to 4 drives
Promise Protocol
Supports Promise Protocol for SATA HBA
over I2C
Drive Support
Each chip supports 4 drives
Support for up to 8 drives by cascading two
MG9070
Managed Elements
Drive Presence
Drive Activity
Drive Fail
Drive Locate
Global Activity
Global Fail
Ready LED Support
Absolute Maximum Ratings
Operating Temperatures -55oC to +125oC
Storage Temperature -65oC to +150oC
Voltage on any pin except RESET# with respect
to ground -1.0V to VCC+0.5V
Voltage on RESET# with respect to ground -1.0
to +13.0V
Maximum operating Voltage 6.00V
DC Current per I/O Pin 40.0mA
DC Current VCC and Ground Pin 200.0mA
Versatile: MG 9070 can be used in a variety of designs
HBA /SGPIO I nterfAce
Each device has one SGPIO
port that can communicate
enclosure management in-
formation to HBAs with
SGPIO interface, support-
ing LED management and
drive presence for up to
4 drives. By adding more
MG9070 devices, the back-
plane can be realized for 8,
12, 16 drives or more.
P rOmISe SAtA HBA
MG9070 is designed to work
with any Promise SATA
HBA over I2C. By adding
more MG9070 devices, the
backplane can be realized for
8, 12, 16 drives or more.
eSB2
The block diagram shows the use of MG9070
with an ESB2 southbridge. By adding more
MG9070 devices, the backplane can be real-
ized for 8, 12, 16 drives or more.
MOTHERBOARD
ESB-2
S
D
O
0
S
D
O
1
S
C
L
K
S
L
O
A
D
MG9070
0 1 2 3
0 1 2 3
MG9070
0 1 2 3
4 5
SDO SDI CLK LOAD SDO SDI CLK LOAD
SAS-HBA
Sideband Signals
connector 1
S
D
O
S
D
I
S
C
L
K
S
L
O
A
D
Sideband Signals
connector 2
S
D
O
S
D
I
S
C
L
K
S
L
O
A
D
MG9070
0 1 2 3
0 1 2 3
SDO SDI CLK LOAD
MG9070
0 1 2 3
SDO SDI CLK LOAD
4 5 6 7
29
29
Promise
SATA-HBA
I2C Signals
S
C
L
S
D
I
MG9070
0 1 2 3
0 1 2 3
SCL_HBA SDA_HBA
MG9070
0 1 2 3
4 5 6 7
SCL_HBA SDA_HBA
Backplane_ID Backplane_ID
`