AM186EM Datasheet, PDF (81/98 Pages) List of Unclassifed Manufacturers – MICROCONTROLLER BLOCK DIAGRAM

PRELIMINARY
SWITCHING CHARACTERISTICS over COMMERCIAL operating range
Software Halt Cycle (20 MHz and 25 MHz)
Parameter
No. Symbol
Description
General Timing Responses
3
t_CHSV Status Active Delay
4
t_CLSH Status Inactive Delay
5
t_CLAV
AD Address Invalid Delay and
BHE
9
t_CHLH ALE Active Delay
10
t_LHLL ALE Width
11 t_CHLL ALE Inactive Delay
19
t_DXDL DEN Inactive to DT/R Low^(a)
22 t_CHCTV Control Active Delay 2^(b)
68
t_CHAV
CLKOUTA High to A Address
Invalid
Preliminary
20 MHz
25 MHz
Min
Max
Min
0
25
0
0
25
0
0
25
0
25
t_CLCL – 10 = 40
t_CLCL – 10 = 30
25
0
0
0
25
0
0
25
0
Max
20
20
20
20
20
20
20
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
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 Equal loading on referenced pins.
b This parameter applies to the DEN signal.
Am186/188EM and Am186/188EMLV Microcontrollers
81