Technical Information C23-SATA • PCIe to SATA RAID Controller Mezzanine Card
© EKF -42- ekf.com
Additional Functions
Firmware Hub 2
The C23-SATA is optionally provided with a 82802 compatible 8Mbit Flash (Firmware Hub), which can
be used either as alternative boot BIOS, as an expansion memory to the CPU board BIOS, or for BIOS
retrieval/rescue. The Firmware Hub is connected to the LPC (Low Pin Count) interface. The device ID of
a particular FWH determines whether it is detected as BIOS after power on (ID = 0). If stuffed, the
jumper J-FWH sets the on-board FWH2 ID to zero (and simultaneously changes the CCG-RUMBA SPI
Flash BIOS ID to 1) - hence the system will use the BIOS on the C23-SATA after power-on.
A programming tool for the Firmware Hub and latest BIOS releases can be obtained from the EKF
website.
SMBus EEPROM
The C23-SATA is provided with a 24C01 1Kbit I
2
C EEPROM, for storing board configuration data. The
EEPROM is accessed via the SMBus. If there is need for storing additional customer data, EKF can
place an EEPROM instead with custom specific data space, e.g. 24C16.
If required, the SMBus EEPROM A1 can be optionally controlled (stuffing option) by SIO GP34 (serial
port 4 DTR#), and the SMBus EEPROM WP is likewise tied to GP67 (serial port 4 RTS4#).
J-FWH2
removed
set
1st BIOS
FWH2 is
2nd BIOS
- jumper removed: system boots
from carrier board FWH
- jumper set: system boots
from mezzanine board FWH2
