Functional Description

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.

4.11VME 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.

4.12USB

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.

4.13I2C Devices

The MVME2500 utilizes one of the two I2C ports provided by the board's processor. The I2C 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.

MVME2500 Installation and Use (6806800L01H)

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Emerson MVME2500 manual VME Support, 12 USB, 13 I2C Devices, 11.1 Tsi148 VME Controller