AM186EM-20KC/W AMD [Advanced Micro Devices], AM186EM-20KC/W Datasheet - Page 72

• Manufacturer Part Number: AM186EM-20KC/W
• Description: High Performance, 80C186-/80C188-Compatible and 80L186-/80L188-Compatible, 16-Bit Embedded Microcontrollers
• Manufacturer: AMD [Advanced Micro Devices]

SWITCHING CHARACTERISTICS over COMMERCIAL operating range
PSRAM Write Cycle (20 MHz and 25 MHz)
Notes:
All timing parameters are measured at 1.5 V with 50 pF loading on CLKOUTA unless otherwise noted. All output test conditions
are with C
a Equal loading on referenced pins.
b This parameter applies to the DEN , WR, WHB, and WLB signals.
72
General Timing Responses
Write Cycle Timing Responses
No.
10
11
23
20
80
81
84
30
31
32
33
34
65
68
87
5
7
8
9
Symbol
t
t
t
t
t
t
t
t
t
t
CLDOX
t
t
t
t
t
t
CVCTV
CVCTX
t
t
CLCLX
CLCSL
t
WLWH
L
WHLH
WHDX
CHDX
AVWL
CHAV
CLAV
CLDV
CHLH
LHAV
LHLL
CHLL
LRLL
AVBL
= 50 pF. For switching tests, V
AD Address Valid Delay and
BHE
Data Valid Delay
Status Hold Time
ALE Active Delay
ALE Width
ALE Inactive Delay
ALE High to Address Valid
Control Active Delay 1
LCS Inactive Delay
LCS Active Delay
LCS Precharge Pulse Width
Data Hold Time
Control Inactive Delay
WR Pulse Width
WR Inactive to ALE High
Data Hold after WR
A Address Valid to WR Low
CLKOUTA High to A
Address Valid
A Address Valid to WHB,
WLB Low
Parameter
Description
Am186/188EM and Am186/188EMLV Microcontrollers
(a)
IL
(b)
(b)
= 0.45 V and V
(a)
P R E L I M I N A R Y
t
t
t
t
CLCL
CLCL
CLCL
CLCL
2t
t
t
CLCH
CHCL
CLCL
IH
Min
=90
–10=40
20
–3
–10=40
–3
+ t
+t
0
0
0
0
0
0
0
0
0
20 MHz
= 2.4 V, except at X1 where V
–10
CHCL
–2
–3
CLCH
Preliminary
Max
25
25
25
25
25
25
25
25
25
25
t
CLCL
t
t
CLCL
CLCL
t
CLCL
2t
t
t
CLCH
CHCL
CLCL
Min
=70
+ t
–10=30
–10=30
15
–3
+t
0
0
0
0
0
0
3
0
0
0
25 MHz
CLCH
CHCL
–10
–3
–2
IH
= V
–
CC
Max
20
20
20
20
20
20
20
20
20
20
– 0.5 V.
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns