AM186EM-20KC/W AMD [Advanced Micro Devices], AM186EM-20KC/W Datasheet - Page 85

• 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
Clock (33 MHZ and 40 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 The specifications for CLKIN are applicable to the normal PLL and CLKDIV2 modes.
CLKIN Requirements
CLKOUT Timing
No.
36
37
38
39
40
42
43
44
45
46
61
69
70
The PLL should be used for operations from 16.667 MHz to 40 MHz. For operations below 16.667 MHz, the CLKDIV2
mode should be used.
Because the CLKDIV2 input frequency is two times the system frequency, the specifications for twice the frequency should
be used for CLKDIV2 mode. For example, use the 20 MHz CLKIN specifications for 10 MHz operation.
Symbol
t
t
CH1CH2
t
t
CL2CL1
t
t
t
t
t
t
t
t
t
CICOA
CICOB
L
CHCK
CLCK
CKHL
CKLH
CLCH
CHCL
LOCK
CKIN
CLCL
= 50 pF. For switching tests, V
X1 Period
X1 Low Time (1.5 V)
X1 High Time (1.5 V)
X1 Fall Time (3.5 to 1.0 V)
X1 Rise Time (1.0 to 3.5 V)
CLKOUTA Period
CLKOUTA Low Time
(C
CLKOUTA High Time
(C
CLKOUTA Rise Time
(1.0 to 3.5 V)
CLKOUTA Fall Time
(3.5 to 1.0 V)
Maximum PLL Lock Time
X1 to CLKOUTA Skew
X1 to CLKOUTB Skew
Parameter
L
L
=50 pF)
=50 pF)
Description
(a)
Am186/188EM and Am186/188EMLV Microcontrollers
IL
(a)
(a)
= 0.45 V and V
(a)
(a)
P R E L I M I N A R Y
0.5t
0.5t
CLCL
=13.5
CLCL
=13.5
IH
Min
30
10
10
30
= 2.4 V, except at X1 where V
33 MHz
–1.5
–1.5
Max
Preliminary
60
15
21
5
5
3
3
1
0.5t
0.5t
=11.25
CLCL
=11.25
CLCL
Min
7.5
7.5
25
25
40 MHz
–1.25
–1.25
IH
= V
CC
– 0.5 V.
Max
60
15
21
5
5
3
3
1
Unit
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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