dsp56852 Freescale Semiconductor, Inc, dsp56852 Datasheet - Page 24

• Manufacturer Part Number: dsp56852
• Description: 56800e 16-bit Digital Signal Controllers Digital Signal Controller
• Manufacturer: Freescale Semiconductor, Inc

Some of the parameters contain two sets of numbers. These parameters have two different paths and
clock edges that must be considered. Check both sets of numbers and use the smaller result. The
appropriate entry may change if the operating frequency of the part changes.
The timing of write cycles is different when WWS = 0 than when WWS > 0. Therefore, some parameters
contain two sets of numbers to account for this difference. The “Wait States Configuration” column of
Table 4-7
24
A0-Axx,CS
D0-D15
Note: During read-modify-write instructions and internal instructions, the address lines do not change state.
WR
should be used to make the appropriate selection.
RD
t
Figure 4-10 External Memory Interface Timing
WRWR
t
AWR
t
DWR
t
Data Out
DOS
t
WR
56852 Technical Data, Rev. 8
t
t
DOH
WAC
t
WRRD
t
ARDA
t
AD
t
ARDD
t
RDD
t
RD
Data In
t
DRD
t
RDA
Freescale Semiconductor
t
RDRD
t
RDWR