Flash Memory
MPC5606S Microcontroller Reference Manual, Rev. 7
646
Freescale Semiconductor
17.4.3.2.2
Platform Flash Configuration Register 1 (PFCR1)
This register defines the configuration associated with flash memory bank1. This typically corresponds to
the optional “data flash”. If bank1 is not present, the contents of this register are ignored. The register is
described below in
Offset 0x020
Access:
Read/write
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
B1_APC
B1_WWSC
B1_RWSC
B1_
RW
WC
W
Reset
0
0
0
1
0
0
0
0
1
0
0
0
0
1
0
1
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R B1_
RW
WC
0
0
0
0
0
0
B1_P
1_BF
E
B1_
RW
WC
0
0
0
0
0
0
B1_P
0_BF
E
W
Reset
1
0
0
0
0
0
0
1
1
0
0
0
0
0
0
1
Figure 17-45. PFLASH Configuration Register 1 (PFCR1)
Table 17-65. PFLASH Configuration Register 1 field descriptions
Field
Description
B1_APC
Bank1 Address Pipelining Control. This field is used to control the number of cycles between flash
array access requests. This field must be set to a value appropriate to the operating frequency of the
PFLASH. The required settings are documented in the SoC specification. Higher operating
frequencies require non-zero settings for this field for proper flash operation. This field is set to
0b00010 by hardware reset.
00000
Accesses may be initiated on consecutive (back-to-back) cycles
00001
Access requests require one additional hold cycle
00010
Access requests require two additional hold cycles
...
11110
Access requests require 30 additional hold cycles
11111
Access requests require 31 additional hold cycles
This field is ignored in single bank flash configurations.
B1_WWSC
Bank1 Write Wait State Control. This field is used to control the number of wait-states to be added
to the flash array access time for writes. This field must be set to a value appropriate to the operating
frequency of the PFLASH. The required settings are documented in the SoC specification. Higher
operating frequencies require non-zero settings for this field for proper flash operation. This field is
set to an appropriate value by hardware reset. This field is set to 0b00010 by hardware reset.
00000
No additional wait-states are added
00001
1 additional wait-state is added
00010
2 additional wait-states are added
...
111111 31 additional wait-states are added
This field is ignored in single bank flash configurations.
Содержание MPC5602S
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