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Functional Description
MVME2500 Installation and Use (6806800L01H)
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The MVME2500 uses Marvell's 88SE6121B2-NAA2C000 SATA controller and supports up to 1.5
Gbps (SATA Gen 1). For status indicators, it has an onboard green LED, D12 and D13 for SATA
link and SATA activity status respectively.
4.11 VME Support
The MVME2500 can operate in either System Controller (SCON) mode or non-SCON mode, as
determined by the the switch setting of S1-1 and S1-2.
The P20x0 x1 link is used for the VME backplane connectivity through the Tsi384 (PCI-E/PCI-X)
and Tsi148 (PCI-X/VMEBus) bridges.
See VMEBus P1 Connector, on page 42 and VMEBus P2 Connector, on page 44 for more
information.
4.11.1 Tsi148 VME Controller
The VMEbus interface for the MVME2500 is provided by the Tsi148 VMEbus controller. The
Tsi148 provides the required VME, VME extensions, and 2eSST functions. TI
SN74VMEH22501transceivers are used to buffer the VME signals between the Tsi148 and the
VME backplane. Refer to the Tsi148 user's manual for additional details and/or programming
information.
4.12 USB
The MVME2500 processor implements a dual-role (DR) USB 2.0 compliant serial interface
engine. DC power to the front panel USB port is supplied using a USB power switch which
provides soft-start, current limiting, over current detection, and power enable for port 1.
4.13 I
2
C Devices
The MVME2500 utilizes one of the two I2C ports provided by the board's processor. The I
2
C bus
is a two-wire , serial data (SDA) and serial clock (SCL), synchronous, multi-master bi-directional
serial bus that allows data exchance between this device and other devices such as VPD, SPD,
EEPROM, RTC, temperature sensor, RTM, XMC and IDT clocking.