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AM186ED-20KC/W 数据表(PDF) 79 Page - Advanced Micro Devices

部件名 AM186ED-20KC/W
功能描述  High Performance, 80C186- and 80C188-Compatible, 16-Bit Embedded Microcontrollers
PDF  88 Pages
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制造商  AMD [Advanced Micro Devices]
网页  http://www.amd.com
标志 AMD - Advanced Micro Devices

AM186ED-20KC/W 数据表(HTML) 79 Page - Advanced Micro Devices

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Am186ED/EDLV Microcontrollers
79
PRELI M INARY
D
RA
F T
SWITCHING CHARACTERISTICS over COMMERCIAL and INDUSTRIAL operating ranges
Clock (20 MHz and 25 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 CL =50 pF. For switching tests, VIL=0.45 V and VIH =2.4 V, except at X1 where VIH =VCC – 0.5 V.
a
The specifications for CLKIN are applicable to the normal PLL and CLKDIV2 modes.
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.
Parameter
Preliminary
Unit
20 MHz
25 MHz
No.
Symbol
Description
Min
Max
Min
Max
CLKIN Requirements
36
tCKIN
X1 Period(a)
50
60
40
60
ns
37
tCLCK
X1 Low Time (1.5 V)(a)
15
15
ns
38
tCHCK
X1 High Time (1.5 V)(a)
15
15
ns
39
tCKHL
X1 Fall Time (3.5 to 1.0 V)(a)
55
ns
40
tCKLH
X1 Rise Time (1.0 to 3.5 V)(a)
55
ns
CLKOUT Timing
42
tCLCL
CLKOUTA Period
50
40
ns
43
tCLCH
CLKOUTA Low Time (CL=50 pF)
0.5tCLCL–2=23
0.5tCLCL–2=18
ns
44
tCHCL
CLKOUTA High Time (CL=50 pF)
0.5tCLCL–2=23
0.5tCLCL–2=18
ns
45
tCH1CH2
CLKOUTA Rise Time
(1.0 to 3.5 V)
33
ns
46
tCL2CL1
CLKOUTA Fall Time
(3.5 to 1.0 V)
33
ns
61
tLOCK
Maximum PLL Lock Time
1
1
ms
69
tCICOA
X1 to CLKOUTA Skew
15
15
ns
70
tCICOB
X1 to CLKOUTB Skew
25
25
ns



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