SPRS292A − OCTOBER 2005 − REVISED NOVEMBER 2005

CPU CSR register description (continued)

 

 

Table 18. CPU CSR Register Bit Field Description

 

 

 

 

 

 

 

BIT #

NAME

 

 

 

 

DESCRIPTION

 

 

 

31:24

CPU ID

CPU ID + REV ID. Read only.

Identifies which CPU is used and defines the silicon revision of the CPU.

 

 

23:16

REVISION ID

CPU ID + REVISION ID (31:16) are combined for a value of 0x0203

 

 

 

 

 

 

 

Control power-down modes. The values are always read as zero.

 

 

000000

=

no power-down (default)

15:10

PWRD

001001

=

PD1, wake-up by an enabled interrupt

010001

=

PD1, wake-up by an enabled or not enabled interrupt

 

 

 

 

011010

=

PD2, wake-up by a device reset

 

 

011100

=

PD3, wake-up by a device reset

 

 

Others

 

=

Reserved

 

 

 

 

 

 

 

Saturate bit.

 

 

 

 

Set when any unit performs a saturate. This bit can be cleared only by the MVC instruction and can

9

SAT

be set only by a functional unit. The set by the a functional unit has priority over a clear (by the MVC

 

 

instruction) if they occur on the same cycle. The saturate bit is set one full cycle (one delay slot) after

 

 

a saturate occurs. This bit will not be modified by a conditional instruction whose condition is false.

 

 

 

 

 

Endian bit. This bit is read-only.

8

EN

Depicts the device endian mode.

0

=

Big Endian mode.

 

 

 

 

1

=

Little Endian mode [default].

 

 

 

 

 

Program Cache control mode.

7:5

PCC

L1D, Level 1 Program Cache

000/010

=

Cache Enabled / Cache accessed and updated on reads.

 

 

 

 

All other PCC values reserved.

 

 

 

 

 

Data Cache control mode.

4:2

DCC

L1D, Level 1 Data Cache

000/010

=

Cache Enabled / 2-Way Cache

 

 

 

 

All other DCC values reserved

 

 

 

 

 

Previous GIE (global interrupt enable); saves the Global Interrupt Enable (GIE) when an interrupt is

 

 

taken. Allows for proper nesting of interrupts.

1

PGIE

 

 

 

 

 

 

 

0

=

Previous GIE value is 0. (default)

 

 

1

=

Previous GIE value is 1.

 

 

 

 

 

Global interrupt enable bit.

 

 

Enables (1) or disables (0) all interrupts except the reset interrupt and NMI (nonmaskable interrupt).

0

GIE

 

 

 

 

 

 

 

0

=

Disables all interrupts (except the reset interrupt and NMI) [default]

 

 

1

=

Enables all interrupts (except the reset interrupt and NMI)

 

 

 

 

 

 

 

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Motorola TMS320C6711D warranty CPU CSR Register Bit Field Description, Cpu Id, Pcc