Freescale Semiconductor MPC5553 - Read;Write Access Data (RWD)

MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
25-38 Freescale Semiconductor
Table 25-29 details the status bit encodings.
25.11.4 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.
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.
Table 25-29. 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
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
R Read/Write Data
W
Reset0000000000000000
Nexus Reg 0x9
1514131211109876543210
R Read/Write Data
W
Reset0000000000000000
Nexus Reg 0x9
Figure 25-17. Read/Write Access Data Register (RWD)
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
R Read/Write Address
W
Reset0000000000000000
Nexus Reg 0xA
1514131211109876543210
R Read/Write Address
W
Reset0000000000000000
Nexus Reg 0xA
Figure 25-18. Read/Write Access Address Register (RWA)