Information

FB_CSPMCR field descriptions (continued)
Field Description
23–20
GROUP3
FlexBus Signal Group 3 Multiplex control
Controls the multiplexing of the FB_CS5 , FB_TSIZ1, and FB_BE_23_16 signals.
0000 FB_CS5
0001 FB_TSIZ1
0010 FB_BE_23_16
Any other value Reserved
19–16
GROUP4
FlexBus Signal Group 4 Multiplex control
Controls the multiplexing of the FB_TBST , FB_CS2 , and FB_BE_15_8 signals.
0000 FB_TBST
0001 FB_CS2
0010 FB_BE_15_8
Any other value Reserved
15–12
GROUP5
FlexBus Signal Group 5 Multiplex control
Controls the multiplexing of the FB_TA , FB_CS3 , and FB_BE_7_0 signals.
NOTE: When GROUP5 is not 0000b, you must write 1b to the CSCR[AA] bit. Otherwise, the bus hangs
during a transfer.
0000 FB_TA
0001 FB_CS3 . You must also write 1b to CSCR[AA].
0010 FB_BE_7_0 . You must also write 1b to CSCR[AA].
Any other value Reserved
11–0
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
29.4 Functional description
29.4.1 Modes of operation
FlexBus supports the following modes of operation:
• Multiplexed 32-bit address and 32-bit data
• Multiplexed 32-bit address and 16-bit data (non-multiplexed 16-bit address and 16-
bit data)
• Multiplexed 32-bit address and 8-bit data (non-multiplexed 24-bit address and 8-bit
data)
• Non-multiplexed 32-bit address and 32-bit data busses
Functional description
K20 Sub-Family Reference Manual, Rev. 1.1, Dec 2012
654
Preliminary
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