MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
Freescale Semiconductor
12-41
12.4.2.6.1
Small Access Example #1: 32-bit Write to 16-bit Port
shows an example of a 32-bit write to a 16-bit port, requiring two 16-bit external transactions.
Figure 12-27. Single Beat 32-bit Write Cycle, 16-bit Port Size, Basic Timing
12.4.2.6.2
Small Access Example #2: 32-byte Write with External TA
shows an example of a 32-byte write to a non-chip select device, such as an external master,
using external TA, requiring eight 32-bit external transactions. Note that due to the use of external TA,
RD_WR does not toggle between the accesses unless that access is the end of a 64-bit boundary. In this
case, an extra cycle is required between TA and the next TS in order to get the next 64-bits of write data
internally and RD_WR negates during this extra cycle.
DATA is valid
DATA is valid
CLKOUT
ADDR[8:31]
TS
DATA[0:31]
TA
RD_
WR
TSIZ[0:1]
BDIP
WE
CS
x
10
A
A+2
ABCDXXXX
EFGHXXXX
Summary of Contents for MPC5553
Page 5: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 2 Freescale Semiconductor...
Page 21: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 xvi Freescale Semiconductor...
Page 47: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 1 26 Freescale Semiconductor...
Page 163: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 4 20 Freescale Semiconductor...
Page 179: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 5 16 Freescale Semiconductor...
Page 561: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 13 38 Freescale Semiconductor...
Page 615: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 14 54 Freescale Semiconductor...
Page 707: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 17 68 Freescale Semiconductor...
Page 755: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 18 48 Freescale Semiconductor...
Page 873: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 19 118 Freescale Semiconductor...
Page 984: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 Freescale Semiconductor 21 41...
Page 985: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 21 42 Freescale Semiconductor...
Page 1019: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 22 34 Freescale Semiconductor...
Page 1129: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 25 90 Freescale Semiconductor...