Datasheet

External Bus Asynchronous Timing
56F807 Technical Data Technical Data, Rev. 16
Freescale Semiconductor 33
3.5 External Bus Asynchronous Timing
Table 3-10 External Bus Asynchronous Timing
1,2
Operating Conditions: V
SS
= V
SSA
= 0 V, V
DD
= V
DDA
= 3.0–3.6 V, T
A
= –40° to +85°C, C
L
≤ 50pF, f
op
= 80MHz
Characteristic Symbol
Min Max
Unit
Address Valid to WR
Asserted t
AWR
6.5 — ns
WR
Width Asserted
Wait states = 0
Wait states > 0
t
WR
7.5
(T*WS)+7.5
—
—
ns
ns
WR
Asserted to D0–D15 Out Valid t
WRD
—T+4.2ns
Data Out Hold Time from WR
Deasserted t
DOH
4.8 — ns
Data Out Set Up Time to WR
Deasserted
Wait states = 0
Wait states > 0
t
DOS
2.2
(T*WS)+6.4
—
—
ns
ns
RD
Deasserted to Address Not Valid t
RDA
0—ns
Address Valid to RD Deasserted
Wait states = 0
Wait states > 0
t
ARDD
18.7
(T*WS) + 18.7
—
ns
ns
Input Data Hold to RD Deasserted t
DRD
0—ns
RD
Assertion Width
Wait states = 0
Wait states > 0
t
RD
19
(T*WS)+19
—
—
ns
ns
Address Valid to Input Data Valid
Wait states = 0
Wait states > 0
t
AD
—
—
1
(T*WS)+1
ns
ns
Address Valid to RD
Asserted t
ARDA
-4.4 — ns
RD
Asserted to Input Data Valid
Wait states = 0
Wait states > 0
t
RDD
—
—
2.4
(T*WS) + 2.4
ns
ns
WR
Deasserted to RD Asserted t
WRRD
6.8 — ns
RD
Deasserted to RD Asserted t
RDRD
0—ns
WR
Deasserted to WR Asserted t
WRWR
14.1 — ns
RD
Deasserted to WR Asserted t
RDWR
12.8 — ns