Vme Support; Tsi148 Vme Controller; Usb; I2C Devices - SMART Embedded Computing MVME2500 Installation & Use Manual

Functional Description
The MVME2500 uses Marvell's 88SE6121B2-NAA2C000 SATA controller and supports up
to 1.5Gbps (SATA Gen 1). For status indicators, it has an on-board 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 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 48
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.
2
4.13 I C Devices
The MVME2500 utilizes one of the two I2C ports provided by the board's processor. The
2
I C bus is a two-wire, serial data (SDA) and serial clock (SCL), synchronous, multi-master
bi-directional serial bus that allows data exchange between this device and other devices
such as VPD, SPD, EEPROM, RTC, temperature sensor, RTM, XMC, and IDT clocking.
The RTM I
addresses to avoid conflict. For more information, see
122.
78
2
C address can be configured by the user and should not contain duplicate
and
VMEBus P2 Connector on page 50
2
I C Bus Device Addressing on page
MVME2500 Installation and Use (6806800L01S)
Functional Description
for more