SiI3726 SATA Port Multiplier
Data Sheet
Silicon Image, Inc.
Storage Enclosure Support
The SiI 3726 SATA Port Multiplier is compliant with the SATA II port multiplier specification. It has a SATA
Enclosure Management Bridge (SEMB) that passes in-band enclosure management data between the host
controller and a companion enclosure management device through an I2C bus.
SiI3726
SATA
I2C
HBA
SEMB
SEP
Figure 2: Enclosure Management Support Overview
The port multiplier supports the SAF-TE and SES protocols. The host issues Enclosure Management commands
through the SATA interface. Enclosure Management commands use the SEP_ATTN commands in the Command
register and the SEP command code in the Features register. The SEP command protocol is defined in the SAF-
TE or SES specification.
The I2C interface is multi-master capable and can transfer data at 0 - 400 kbits/s. The SEMB I2C address is
0001xxx0, where xxx are selected using pins EM_ID[2:0]. This allows up to eight SiI 3726 SATA Port Multipliers
on the same SEMB I2C bus. The SEP I2C address should be 0xC0, as defined in the SATA II specification.
© 2006 Silicon Image, Inc.
SiI-DS-0121-C1
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