dsp56854 Freescale Semiconductor, Inc, dsp56854 Datasheet - Page 34

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

Operating Conditions: V
4.7 Reset, Stop, Wait, Mode Select, and Interrupt Timing
34
RESET Assertion to Address, Data and Control
Signals High Impedance
Minimum RESET Assertion Duration
RESET Deassertion to First External Address Output
Edge-sensitive Interrupt Request Width
RD Deasserted to Address Invalid
Address Valid to RD Deasserted
Valid Input Data Hold after RD
Deasserted
RD Assertion Width
Address Valid to Input Data Valid
Address Valid to RD Asserted
RD Asserted to Input Data Valid
WR Deasserted to RD Asserted
RD Deasserted to RD Asserted
WR Deasserted to WR Asserted
RD Deasserted to WR Asserted
Operating Conditions: V
1.
2.
N/A since device captures data before it deasserts RD
If RWSS = RWSH = 0, RD does not deassert during back-to-back reads and D=0.00 should be used.
Characteristic
Table 4-7 Reset, Stop, Wait, Mode Select, and Interrupt Timing
SS
Characteristic
Figure 4-11 External Memory Interface Timing (Continued)
= V
SS
= V
SSIO
SSIO
= V
= V
SSA
SSA
= 0 V, V
3
= 0 V, V
Symbol
t
t
t
t
t
t
WRWR
WRRD
RDWR
t
ARDD
t
ARDA
t
RDRD
RDA
DRD
t
t
RDD
RD
AD
DD
DD
56854 Technical Data, Rev. 6
= 1.62-1.98 V, V
= 1.62-1.98V, V
Configuration
Wait States
WWS=0
WWS>0
Symbol
DDIO
DDIO
t
t
t
RAZ
t
RDA
IRW
RA
= V
= V
DDA
DDA
= 3.0–3.6V, T
= 3.0–3.6V, T
-10.27
-12.64
-0.16
- 0.44
- 0.94
-2.07
-1.34
-13.5
-9.53
-0.75
-0.44
-0.11
-0.57
1T + 3
0.00
0.14
Min
D
30
—
—
2
A
= –40° to +120°C, C
A
N/A
120T
= –40° to +120°C, C
Max
0.00
1.00
1.00
1.00
1.19
0.00
1.00
1.19
0.25
0.00
0.75
1.00
0.50
0.69
M
11
—
—
1
MDAR, BMDAR,
WWSS, WWSH
RWSH, WWSS
WWSH,RWSS
RWSS,RWSH
Wait States
RWSS,RWS
RWSS,RWS
RWSS,RWS
Unit
Controls
Freescale Semiconductor
ns
ns
ns
ns
L
RWSH
RWSS
RWS
≤ 50pF, f
—
1, 2
L
< 50pF, P = 8.333ns
See Figure
op
= 120MHz
4-12
4-12
4-12
4-13
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns