MC68030RC33C Freescale Semiconductor, MC68030RC33C Datasheet - Page 327

• Manufacturer Part Number: MC68030RC33C
• Description: IC MPU 32BIT ENHANCED 128-PGA
• Manufacturer: Freescale Semiconductor

Specifications of MC68030RC33C

• Processor Type: M680x0 32-Bit
• Speed: 33MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 128-PGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

9.5.1.7 SHORT-FORMAT PAGE DESCRIPTOR.
9.5.1.8 LONG-FORMAT PAGE DESCRIPTOR.
{
9.5.1.9 SHORT-FORMAT INVALID DESCRIPTOR.
9-26
31
tor consists of a DT field that contains zeros, identifying it as an invalid
that reside on an external device. For example, the disk address of disk-
format of a short-format invalid descriptor.
tical to of the short-format early termination page descriptor shown in Figure
9-12.
also used in the page tables. The field descriptions in 9.5.1.1 DESCRIPTOR
descriptor. It can be used at any level of the address translation tree except
at the root pointer level. The 30-bit unused field is available to the operating
system to identify unallocated portions of the table or portions of the table
used in the page tables (the bottom level of the address table). The field
descriptions in 9.5.1.1 DESCRIPTOR FIELD DEFINITIONS apply to the corre-
sponding fields of this descriptor. The short-format page descriptor is iden-
FIELD DEFINITIONS apply to the corresponding fields of this descriptor. Fig-
ure 9-14 shows the format of the long-format page descriptor.
I
resident tables or pages can be stored in this field. Figure 9-15 shows the
UNUSED
15
16
14
13
12
16 15
11
Figure 9-14. Long-Format Page Descriptor
Figure 9-15. Short-Format Invalid Descriptor
I
10
31
9
STATUS
8
MC68030 USER'S MANUAL
16
I
7
6
5
0 31
UNUSED
4
3
The long-format page descriptor is
The short-format page descriptor is
2
The short-format invalid descrip-
1
PAGE ADDRESS
I
0
2 1 0
32
I B T I
8 7
I
MOTOROLA
UNUSED I
0