AM188ES-40KCW Datasheet, PDF (80/102 Pages) Advanced Micro Devices – High Performance, 80C186-/80C188-Compatible and 80L186-/80L188-Compatible, 16-Bit Embedded Microcontrollers

PRELIMINARY
SWITCHING CHARACTERISTICS over COMMERCIAL operating ranges
PSRAM Refresh Cycle (20 MHz and 25 MHz)
Parameter
No. Symbol
Description
General Timing Responses
9
t_CHLH ALE Active Delay
10
t_LHLL ALE Width
11 t_CHLL ALE Inactive Delay
Read/Write Cycle Timing Responses
25 t_CLRL RD Active Delay
26 t_RLRH RD Pulse Width
27 t_CLRH RD Inactive Delay
28
t_RHLH RD Inactive to ALE High^(a)
80 t_CLCLX LCS Inactive Delay
81 t_CLCSL LCS Active Delay
Refresh Timing Cycle Parameters
79 t_CLRFD CLKOUTA Low to RFSH Valid
82 t_CLRF CLKOUTA High to RFSH Invalid
85 t_RFCY RFSH Cycle Time
86 t_LCRF LCS Inactive to RFSH Active
Delay
Preliminary
20 MHz
25 MHz
Min
Max
Min
Max Unit
25
20 ns
t_CLCL – 10 = 40
t_CLCL – 10 = 30
ns
25
20 ns
0
25
0
20 ns
2t_CLCL – 15 = 85
2t_CLCL – 15 = 65
ns
0
25
0
20 ns
t_CLCH – 3
t_CLCH – 3
ns
0
25
0
20 ns
0
25
0
20 ns
0
25
0
20 ns
0
25
0
20 ns
6 • t_CLCL
2t_CLCL – 3
6 • t_CLCL
ns
2t_CLCL – 3
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_L =50 pF. For switching tests, V_IL=0.45 V and V_IH =2.4 V, except at X1 where V_IH =V_CC – 0.5 V.
a Testing is performed with equal loading on referenced pins.
80
Am186/188ES and Am186/188ESLV Microcontrollers