CALRAM Operation
MPC561/MPC563 Reference Manual, Rev. 1.2
22-16
Freescale Semiconductor
to be four bytes, regardless of the value programmed in the RGN_SIZE[0:3] field. See
“CALRAM Overlay Configuration Register (CRAM_OVLCR)
for details.
The implemented bits of CRAM_RBAx bits are unaffected by reset (hard reset). The diagram below shows
one such register, CRAM_RBA0, which provides the base address of overlay region 0.
MSB
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Field
RGN_SIZE
—
RBA
SRESET
Unaffected
0000_000
Unaffected
Addr
0x38 0008–0x38 0024
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
LSB
31
Field
RBA
—
SRESET
Unaffected
00
Figure 22-10. CALRAM Region Base Address Register (CRAM_RBAx)
Table 22-5. CRAM_RBAx Bit Descriptions
Bits
Name
Description
0:3
RGN_SIZ
E
These bits define the size of the overlay region. See
for sizes.
4:10
—
Reserved
11:29
RBA
The region base address defines the starting address of the memory to be overlayed.
1
1
The overlay match address will include ISB in its comparison. The overlay can only be in the range of the ISB internal
space.
30:31
—
Reserved
Table 22-6. RGN_SIZE Encoding
RGN_SIZE
Number of Overlay Bytes
0000
Overlay block disabled
0001
Overlay block is 4 bytes
0010
Overlay block is 16 bytes
0011
Overlay block is 32 bytes
0100
Overlay block is 64 bytes
0101
Overlay block is 128 bytes
0110
Overlay block is 256 bytes
0111
Overlay block is 512 bytes
1xxx
Reserved
Note:
The overlay size of 8 bytes cannot be selected
Summary of Contents for MPC561
Page 84: ...MPC561 MPC563 Reference Manual Rev 1 2 lxxxiv Freescale Semiconductor...
Page 144: ...Signal Descriptions MPC561 MPC563 Reference Manual Rev 1 2 2 46 Freescale Semiconductor...
Page 206: ...Central Processing Unit MPC561 MPC563 Reference Manual Rev 1 2 3 62 Freescale Semiconductor...
Page 302: ...Reset MPC561 MPC563 Reference Manual Rev 1 2 7 14 Freescale Semiconductor...
Page 854: ...Time Processor Unit 3 MPC561 MPC563 Reference Manual Rev 1 2 19 24 Freescale Semiconductor...
Page 968: ...Development Support MPC561 MPC563 Reference Manual Rev 1 2 23 54 Freescale Semiconductor...
Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
Page 1212: ...TPU3 ROM Functions MPC561 MPC563 Reference Manual Rev 1 2 D 60 Freescale Semiconductor...
Page 1216: ...Memory Access Timing MPC561 MPC563 Reference Manual Rev 1 2 E 4 Freescale Semiconductor...