PXD20RM Datasheet, PDF (879/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

23.2.2.4 PRAM2P Fill Region End Address Register (PRAM2P_END)
Offset 0xC
Access: User read/write
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
R0 0 0 0 0 0 0 0
W
END_ADDR[23:4]
0000
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Figure 23-5. PRAM2P Fill Region End Address Register (PRAM2P_END)
Table 23-5. PRAM2P_END Field Descriptions
Field
Description
END_ Fill operation will end at GSRAM base address + {END_ADDR[23:4],4’b0}. While the GSRAM is buy filling indicated
ADDR by the BUSY bit in the PRAM2P_SR, this register will not be writable. Any write access to this register will return an
[23:4] error.
23.2.2.5 PRAM2P Fill Register (PRAM2P_FIL)
The PRAM2P Fill Register is used to begin the initialization of the RAM array. The Array can be filled
with either ones or zeroes depending on the FILL bit.
Offset 0x10
Access: User read/write
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
W
Reset 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
W
FILL
STAR
T
Reset 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 23-6. PRAM2P Fill Register(PRAM2P_FIL)
Table 23-6. PRAM2P_FIL Field Descriptions
Field
Description
FILL FILL is a writable bit which determines whether the memory is filled with ones or zeroes.
START
When START is written 0x1, the fill operation will be begin writing 0x0s or 0x1s to the RAM array from the address
in PRAM2P_BEG,23.2.2.3, to PRAM2P_END, 23.2.2.4. While filling, all accesses to the parts of the array that are
“to be filled” will return an error. Areas not targeted as well as areas that have already been filled are accessible and
can interrupt the Fill operation's access to the array This register will also be read only until the fill operation is
complete returning an error on all writes.
Freescale Semiconductor
PXD20 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
23-5