Optional Intel® Raid Maintenance Free Backup Unit (Rmfbu); Table 6. Uart Connector Pinout - Intel RMSP3AD16OF Hardware User's Manual

Intel® RAID Modules RMSP3AD160F, RMSP3CD080F and RMSP3HD080E Hardware User Guide
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.

Table 6. UART connector pinout

Pin Function
1 UART_TX
2 GND
3 UART_RX
4 1.8 V
16