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參數(shù)資料
| 型號(hào)： | SCS152 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | HM Series Hermetically Sealed Basic Switch, Single Pole Double Throw Circuitry, 0.5 A at 28 Vdc, Integral Lever Actuator, Solder Termination |
| 中文描述： | 而Keeloq令牌卡芯片 |
| 文件頁(yè)數(shù)： | 3/16頁(yè) |
| 文件大?。?/td> | 182K |
| 代理商： | SCS152 |
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SCS152
1997 Microchip Technology Inc.
Preliminary
DS40150B-page 3
2.4
Digit Fields
2.4.1
DIGIT FIELD VALUE
Each digit field, D4 to D0, represents a number equal to
the number of ‘1’ bits in the field. Table 2-2 shows the
value of the digit field for each legal digit value.
TABLE 2-2:
Digit Value
DIGIT FIELD VALUES
2.4.2
TOKEN COUNTER VALUE
The following formula shows how the digit fields combine to form the token counter value:
This is, in fact, an octal representation of a value and can be written as:
Suppose the 5-digit field contain the values: (D4=3), (D3=0), (D2=7), (D1=1), (D0=3). The token counter value is then
30713
8
in octal or in decimal:
A digit needs to be set to eight to handle the borrow from the next higher stage. This also implies that each counter value
does not have a unique representation. For example, 00500
8
= 5 x 64 = 320
10
or 00480
8
or 00478
8
.
Field Value
0
1
2
3
4
5
6
7
8
The bits are shown, right to left, in the order
in which they are read out.
0000 0000
1000 0000
1100 0000
1110 0000
1111 0000
1111 1000
1111 1100
1111 1110
1111 1111
Note:
Note:
The value digit D4 is shown in the formulas as |D4| indicating the number of 1 bits in the digit D4 field.
Similarly |D3| indicates the number of 1 bits in the digit D3 field, and so on.
Tokens
D
4
4096
D
3
512
D
2
64
D
1
8
D
0
+
×
+
×
+
×
+
×
=
Tokens
D
4
8
4
D
3
8
3
D
2
8
2
D
1
8
1
D
0
8
0
×
+
×
+
×
+
×
+
×
=
Tokens
3
4096
0
512
7
64
1
8
3
+
×
+
×
+
×
+
×
12747
10
=
=
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| SCS152-IS | Small glass bead with axial leads |
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相關(guān)代理商/技術(shù)參數(shù) |
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| SCS-1522B | 制造商:SYNERGY 制造商全稱:SYNERGY MICROWAVE CORPORATION 功能描述:HIGH POWER BI-DIRECTIONAL COUPLERS |
| SCS-1522D | 制造商:SYNERGY 制造商全稱:SYNERGY MICROWAVE CORPORATION 功能描述:HIGH POWER BI-DIRECTIONAL COUPLERS |
| SCS152-IS | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:KEELOQ Token Card Chip |
| SCS152-IW | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:KEELOQ Token Card Chip |
| SCS152-IWF | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:KEELOQ Token Card Chip |
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