Nexus
MPC5566 Microcontroller Reference Manual, Rev. 2
Freescale Semiconductor 25-41
Table 25-30 details the status bit encodings.
25.11.5 Read/Write Access Address (RWA)
The read/write access address register provides the system bus address to be accessed when initiating a
read or a write access.
25.11.6 Read/Write Access Data (RWD)
The read/write access data register provides the data to/from system bus memory-mapped locations when
initiating a read or a write access.
15–2
CNT[13:0]
Access control count. Number of accesses of word size SZ
1
ERR
Read/write access error. Refer to Table 25-30.
0
DV
Read/write access data valid. Refer to Table 25-30.
Table 25-30. Read/Write Access Status Bit Encoding
Read Action Write Action ERR DV
Read access has not completed Write access completed without error 0 0
Read access error has occurred Write access error has occurred 1 0
Read access completed without error Write access has not completed 0 1
Not allowed Not allowed 1 1
Nexus Reg: 0x0009 Access: R/W
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R
Read/Write Address
W
Reset00000000000000000000000000000000
Figure 25-19. Read/Write Access Address Register (RWA)
Nexus Reg: 0x000A Access: R/W
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R
Read/Write Data
W
Reset00000000000000000000000000000000
Figure 25-20. Read/Write Access Data Register (RWD)
Table 25-29. RWCS Field Description (continued)
Field Description
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