Marvel Group Integrated Controller 88F6281 - Manual (Page 25)

Pin and Signal Descriptions
Pin Descriptions
Copyright © 2008 Marvell Doc. No. MV-S104859-U0 Rev. E
December 2, 2008, Preliminary Document Classification: Proprietary Information Page 25
M_STARTBURST O SSTL VDD_M Start Burst
88F6281 indication of starting a burst read transaction.
Asserted with the first M_CASn cycle of SDRAM access.
NOTE: Must be routed on board to the SDRAM, and back to
the 88F6281 as M_STARTBURST_IN. For the
recommended length calculation for this routing and
termination requirements, see the 88F6180, 88F6190,
88F6192, and 88F6281 Design Guide.
M_START
BURST_IN I SSTL VDD_M Start Burst Input
M_PCAL I Calib SDRAM interface P channel output driver calibration. Connect
to VSS through a resistor. The resistor value can vary
between 30–70 ohm.
NOTE: See the 88F6180, 88F6190, 88F6192, and 88F6281
Design Guide for the recommended values of the
calibration resistors.
M_NCAL I Calib SDRAM interface N channel output driver calibration. Connect
to M_VDD through a resistor. The resistor value can vary
between 30–70 ohm.
NOTE: See the 88F6180, 88F6190, 88F6192, and 88F6281
Design Guide for the recommended values of the
calibration resistors.
Table 5: DDR SDRAM Interface Pin Assignments (Continued)
P i n N a m e I / O P i n
Ty p e P o w e r
R a i l D e s c r i p t i o n