dsp56854 Freescale Semiconductor, Inc, dsp56854 Datasheet - Page 33

• Manufacturer Part Number: dsp56854
• Description: 16-bit Digital Signal Controllers
• Manufacturer: Freescale Semiconductor, Inc

Operating Conditions: V
Freescale Semiconductor
Address Valid to WR Asserted
WR Width Asserted to WR
Deasserted
Valid Data Out Hold Time after WR
Deasserted
Valid Data Out Set Up Time to WR
Deasserted
Valid Address after WR
Deasserted
Data Out Valid to WR Asserted
A0-Axx,CS
D0-D15
WR
RD
Characteristic
Note: During read-modify-write instructions and internal instructions, the address lines do not change state.
SS
= V
SSIO
Figure 4-10 External Memory Interface Timing
t
WRWR
= V
Figure 4-11 External Memory Interface Timing
t
AWR
t
SSA
DWR
= 0 V, V
Symbol
t
t
t
t
t
AWR
t
DWR
WAC
DOH
DOS
t
WR
Data Out
DOS
DD
t
WR
56854 Technical Data, Rev. 6
= 1.62-1.98 V, V
Configuration
Wait States
WWS=0
WWS>0
WWS=0
WWS>0
WWS=0
WWS=0
WWS>0
WWS>0
t
t
DOH
WAC
DDIO
t
WRRD
= V
DDA
t
ARDA
= 3.0–3.6V, T
- 5.69
-0.79
-1.98
-0.86
-0.01
-2.10
-4.66
-1.47
-2.36
-4.67
-1.60
-1.52
D
t
AD
t
ARDD
t
RDD
t
RD
A
= –40° to +120°C, C
0.50
0.69
0.19
0.00
0.00
0.25
0.19
0.50
0.25
0.19
0.50
0.25
M
Data In
External Memory Interface Timing
t
Wait States
WWS,WWSS
DRD
t
Controls
RDA
t
WWSS
WWSS
WWSH
WWSH
RDRD
WWS
t
RDWR
L
< 50pF, P = 8.333ns
Unit
ns
ns
ns
ns
ns
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