MPC8536E-ANDROID Freescale Semiconductor, MPC8536E-ANDROID Datasheet - Page 455

• Manufacturer Part Number: MPC8536E-ANDROID
• Description: HARDWARE/SOFTWARE ANDROID OS
• Manufacturer: Freescale Semiconductor
• Series: PowerQUICC ™r
• Type: MPUr

Specifications of MPC8536E-ANDROID

• Contents: Board
• For Use With/related Products: MPC8536
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

10.3.3
The descriptor contains seven “pointer dwords” which define where in memory the SEC should access its
input and output parcels. The pointer dwords are numbered 0 to 6 as shown in
determines how it uses each of the pointer dwords based on the descriptor type and direction fields in the
header (see
The pointer dword bit fields as shown in
On occasion, a descriptor field may not be applicable to the requested service. With seven pointer dwords,
it is possible that not all these dwords are required to specify the input and output parameters (for instance,
some operations do not require context.) Wherever a particular field is not used, it should be set to zero.
The channel proceeds linearly through the descriptor, fetching LENGTH data beginning at location
POINTER. If the EAE (extend address enable) bit is set in the channel configuration register (see
Table
address.
Freescale Semiconductor
Reset
Reset
W
W
R
R
17-23
24-27
28-31
32-63
0-15
Bits
10-11), then the four EPTR bits are concatenated with the POINTER field to form a 36-bit pointer
32
16
0
Table
Descriptor Format: Pointer Dwords
POINTER
LENGTH
EXTENT
10-4).
Name
EPTR
MPC8536E PowerQUICC III Integrated Processor Reference Manual, Rev. 1
—
J
LENGTH
Length: A number of bytes in the range 0 to 65535. The use of this field depends on
the descriptor type and direction fields in the header dword. A value of zero may
cause the channel to skip this dword.
Jump: Determines whether to “jump” to a link table whenever the POINTER field in
this same dword is used.
0 The POINTER field points to data.
1 The POINTER field points to a link table, and scatter/gather is enabled.
Extent: A number of bytes in the range 0 to 127. The use of this field depends on the
“Descriptor Type” and “Direction” fields in the header dword.
Reserved
Extended Pointer: Concatenated as the top 4 bits of the pointer when EAE is high
(see the EAE bit in
Pointer: A memory address.
Table 10-8. Pointer Dword Field Definitions
Figure 10-4. Pointer Dword
Figure
Table
10-4, and are described in
POINTER
All zeros
All zeros
10-11).
15 16 17
J
Description
EXTENT
Table
23 24
Figure
10-8.
——
Security Engine (SEC) 3.0
10-2. The channel
Access: Read/Write
27 28
EPTR
10-25
31
63