EKF SC3-LARGO - Board Control and Status Registers (BCSR)

To Next Page

To Previous Page

User Guide • SC3-LARGO • CompactPCI

Serial CPU Board • Intel

Core

5xxx Processor

Board Control and Status Registers (BCSR)

A set of board control and status registers allow to program special features on the SC3-LARGO:

• Assert a full reset

• Control activity of front panel reset and power event button

• Program time-outs and trigger a watchdog

• Get access to two LEDs in the front panel

• Get power fail and watchdog status of last board reset

The register set consists of five registers located on the SMBus at Device ID=0x5c on the following

addresses:

• 0xA0: CMD_CTRL0_WR: Write to Control Register 0 (Write-Only)

• 0xA1: CMD_CTRL0_RD: Read from Control Register 0 (Read-Only)

• 0xB0: CMD_STAT0_WR: Write to Status Register 0 (Write-Clear)

• 0xB1: CMD_STAT0_RD: Read from Status Register 0 (Read-Only)

• 0xB2: CMD_STAT1_WR: Write to Status Register 1 (Write-Clear)

• 0xB3: CMD_STAT1_RD: Read from Status Register 1 (Read-Only)

• 0xC1: CMD_PLDREV_RD: Read from PLD Revision Register (Read-Only)

To prevent misfunction accesses to the registers should be done by SMBus “Byte Data” commands.

Further writes to read-only or reads to write-only registers should be omitted.