Altera cyclone V Technical Reference page 442

Hard processor system

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Important: To prevent indeterminate system behavior, reserved areas of memory must not be accessed by

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software or hardware. Any area of the memory map that is not explicitly defined as a register

space or accessible memory is considered reserved.

Indicates if the Scan-Chain Engine is processing

commands from the Command FIFO or not. The

Scan-Chain Engine is only guaranteed to be inactive

if both the ACTIVE and WFIFOCNT fields are zero.

The name of this field in ARM documentation is

Command FIFO outstanding byte count. Returns the

number of command bytes held in the Command

FIFO that have yet to be processed by the Scan-Chain

Response FIFO outstanding byte count. Returns the

number of bytes of response data available in the

Response FIFO.

Ignore this field. Its value is undefined (may be 0 or 1)

. The name of this field in ARM documentation is

PORTCONNECTED.

The Scan-Chain Engine may or may not be

processing commands from the Command

FIFO. The Scan-Chain Engine is only

guaranteed to be inactive if both this

ACTIVE field and the WFIFOCNT fields are

The Scan-Chain Engine is processing

commands from the Command FIFO.

Scan Manager

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