Motorola CPCI-6115 manual Onboard Power Supplies, Hot Swap Support, Hot Swap Process

Onboard Power Supplies Functional Description

For software compatibility with the GT-64120/130 devices, the MV64360 maintains MByteSwap and MWordSwap bits in the PCI Command register. If the PCI Command register’s MSwapEn bit is set to "1", the MV64360 PCI master performs data swapping according to PCISwap bits setting. If set to "0" (default), it works according to MByteSwap and MWordSwap bits setting, as in the GT-64120/130 devices.

Refer to the MV64360 data sheet for additional information and programming details.

4.4.3Onboard Power Supplies

The CPCI-6115 CPU board requires +5 V and +3.3 V input power. The +/-12 V input voltages are optional and are routed to the PMC slots. All other required voltages are generated onboard from the +3.3 V or +5 V power. The processor core voltage regulator has a variable output which is set using feedback resistors. In addition to the processor core voltage regulator, there are regulators for +1.8 V, +2.5 V, CPU_VIO, +1.25 V and L3_VIO.

4.4.4Hot Swap Support

The CPCI-6115 provides hardware to support the physical connection process and the hardware connection process of the full hot swap system model defined in the CompactPCI Hot-Swap Specification PICMG 2.1 R2.0. Hot swap support is only applicable when the CPCI- 6115 is installed into a CompactPCI peripheral slot.

4.4.5Hot Swap Process

The CPCI-6115 may be safely inserted and extracted from a hot-swap system chassis while power is applied. Hot-swap circuitry protects the board from electrical damage.

The BD_SEL# signal from CPCI bus J1 pin D15 must be driven true (low) for the back end power supplies to switch on. When BD_SEL# is not asserted only a small portion of the CPCI- 6115 circuitry is powered.

For a system without +/-12 V, the HLTY# signal is driven true (low) to the CPCI bus J1 pin B4 when the +5.0 V and +3.3 V input power supplies are within tolerance. For a system with +/-12 V, these supply voltages can also be monitored and included into the HLTY# signal generation. A jumper selects whether the +/-12 V should be monitored in this way. The HLTY# signal can be used as a status indicator.

4.4.6Intel 21555 Hot Swap Support

The 21555 Bridge contains a CompactPCI Hot Swap Control Register which includes the following functions:

zThe 21555 drives the ENUM# signal during a hot-swap event if the ENUM# Interrupt Mask (ENUM_MASK) bit in the CompactPCI Hot-Swap Control Register is cleared.

zThe 21555 supports the LED On/OFF (LOO) status/control bit in the CompactPCI Hot Swap Control Register which enables the host to determine the status of the blue Hot Swap LED and/or force the LED on.

CPCI-6115 CompactPCI Single Board Computer Installation and Use (6806800A68D) 87