L-Bus to U-Bus Interface (L2U)
MPC561/MPC563 Reference Manual, Rev. 1.2
11-14
Freescale Semiconductor
11.8.4
Region Base Address Registers (L2U_RBAx)
The L2U region base address register (L2U_RBAx) defines the base address of a specific region protected
by the data memory protection unit. There are four registers (x = 0...3), one for each supported region.
MSB
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Field
SP
LSHOW
—
Reset
0000_0000_0000_0000
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
LSB
31
Field
—
Reset
0000_0000_0000_0000
Addr
SPR 568
Figure 11-4. L2U Module Configuration Register (L2U_MCR)
Table 11-7. L2U_MCR Bit Descriptions
Bits
Name
Description
0
SP
CALRAM Protection (SP) bit is used to protect the CALRAM on the L-bus from U-bus accesses.
Any attempt to set or clear the SP bit from the U-bus side has no affect.
Once this bit is set, the L2U blocks all CALRAM accesses initiated by the U-bus masters and the
access is terminated with a data error on the U-bus.
If L-bus show cycles are enabled, setting this bit will disable L-bus CALRAM show cycles.
1:2
LSHOW
LSHOW bits are used to configure the show cycle mode for cycles accessing the L-bus slave e.g.
CALRAM
00 Disable show cycles
01 Show address and data of all L-bus space write cycles
10 Reserved
11 Show address and data of all L-bus space read and write cycles
3:31
—
Reserved
MSB
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Field
RBA
Reset
Undefined
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
LSB
31
Field
RBA
—
Reset
Undefined
0000_0000_0000
Addr
SPR 792–795
Figure 11-5. L2U Region x Base Address Register (L2U_RBAx)
Summary of Contents for MPC561
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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...
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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...