AM186EM Datasheet, PDF (87/98 Pages) List of Unclassifed Manufacturers – MICROCONTROLLER BLOCK DIAGRAM

PRELIMINARY
SWITCHING CHARACTERISTICS over COMMERCIAL operating range
Ready and Peripheral Timing (20 MHz and 25 MHz)
Parameter
No. Symbol
Description
Ready and Peripheral Timing Requirements
47
t_SRYCL SRDY Transition Setup Time^(a)
48
t_CLSRY SRDY Transition Hold Time^(a)
49
t_ARYCH
ARDY Resolution Transition
Setup Time^(b)
50
t_CLARX ARDY Active Hold Time^(a)
51 t_ARYCHL ARDY Inactive Holding Time
52 t_ARYLCL ARDY Setup Time^(a)
53
t_INVCH Peripheral Setup Time^(b)
54
t_INVCL DRQ Setup Time^(b)
Peripheral Timing Responses
Preliminary
20 MHz
Min
Max
10
3
10
4
6
15
10
10
Preliminary
25 MHz
Min
Max Unit
10
ns
3
ns
10
ns
4
ns
6
ns
15
ns
10
ns
10
ns
55 t_CLTMV Timer Output Delay
25
20 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 This timing must be met to guarantee proper operation.
b This timing must be met to guarantee recognition at the clock edge.
Am186/188EM and Am186/188EMLV Microcontrollers
87