AM186ER-25KCW AMD [Advanced Micro Devices], AM186ER-25KCW Datasheet - Page 85

• Manufacturer Part Number: AM186ER-25KCW
• Description: High-Performance, 80C186- and 80C188-Compatible, 16-Bit Embedded Microcontrollers with RAM
• Manufacturer: AMD [Advanced Micro Devices]

Switching Characteristics over Commercial and Industrial Operating Ranges
PSRAM Refresh Cycle (40 MHz and 50 MHz)
Notes:
All timing parameters are measured at V
are with C
a Testing is performed with equal loading on referenced pins.
General Timing Responses
Read/Write Cycle Timing Responses
Refresh Timing Cycle Parameters
No.
10
11
25
26
27
28
80
81
79
82
85
86
9
Symbol
L
t
t
t
t
t
t
t
t
t
t
CLRFD
t
t
t
CLCLX
CLCSL
=50 pF. For switching tests, V
CHLH
RLRH
CLRH
RHLH
RFCY
CHLL
CLRL
CLRF
LCRF
LHLL
Description
ALE Active Delay
ALE Width
ALE Inactive Delay
RD Active Delay
RD Pulse Width
RD Inactive Delay
RD Inactive to ALE High
LCS Inactive Delay
LCS Active Delay
CLKOUTA Low to RFSH Valid
CLKOUTA High to RFSH Invalid
RFSH Cycle Time
LCS Inactive to RFSH Active Delay
Parameter
Am186
TM
ER and Am188
CC
IL
/2 with 50 pF loading on CLKOUTA unless otherwise noted. All output test conditions
=0.3 V and V
(a)
IH
TM
=V
ER Microcontrollers Data Sheet
2t
2t
CC
t
CLCL
CLCL
6 x t
CLCL
t
CLCH
–0.3 V.
Min
–5=20
–10=40
0
0
0
0
0
0
CLCL
40 MHz
–1.25
–2
Preliminary
Max
12
12
10
12
12
12
12
12
2t
6 x t
CLCL
t
CLCH
Min
15
35
0
0
0
0
0
0
CLCL
50 MHz
–1.25
–2
Max
10
10
10
10
10
10
10
10
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
85