Intel® RAID Modules RMSP3AD160F, RMSP3CD080F and RMSP3HD080E Hardware User Guide
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Table 6. UART connector pinout
Pin
Function
1
UART_TX
2
GND
3
UART_RX
4
1.8 V
The default communication parameters are 115,200 b/s, 8-bit characters, no parity bit, one stop bit, and no
XON/XOFF flow control.
2.12
Optional Intel® RAID Maintenance Free Backup Unit (RMFBU)
To protect the integrity of cached data on the Intel® RAID Module during a power loss event, the Intel®
Tri-Mode
Modules RMSP3AD160F and RMSP3CD080F provide support for the Intel® Maintenance Free Backup Unit
(RMFBU – Intel Accessory Kit AXXRMFBU7). During a power loss event, this optional accessory provides back-
up power to the RAID Module, allowing the module to offload the data stored in the on-board cache to its non-
volatile NAND flash.
Benefits of the RMFBU option as compared with traditional batteries:
•
Capacitor technology has a longer usable life span than batteries and reduces maintenance and replacement
costs.
•
Capacitors do not have the chemical volatility of batteries, which carry a risk of exothermic events.
•
RMFBU options do not require the comprehensive certifications required of batteries in order to import and
export them.
•
The RMFBU can constantly maintain the RAID volume in write back mode even when doing learn cycles.
•
The recharge rate of the super-capacitor is minutes as compared to hours for a battery.
See Chapter 7 for additional RMFBU information.
