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參數(shù)資料
| 型號： | SAFC163-L |
| 廠商： | SIEMENS AG |
| 元件分類： | 圓形連接器 |
| 英文描述： | Circular Connector; No. of Contacts:37; Series:MS27467; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:15-35 RoHS Compliant: No |
| 中文描述： | 16位CMOS單片機 |
| 文件頁數(shù)： | 36/68頁 |
| 文件大?。?/td> | 625K |
| 代理商： | SAFC163-L |
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11Aug98@14:48h Intermediate Version
Semiconductor Group
34
1998-08
C163-L
AC Characteristics
Definition of Internal Timing
The internal operation of the C163-L is controlled by the internal CPU clock f
CPU
. Both edges of the
CPU clock can trigger internal (eg. pipeline) or external (eg. bus cycles) operations.
The specification of the external timing (AC Characteristics) therefore depends on the time between
two consecutive edges of the CPU clock, called “TCL” (see figure below).
Figure 10
Generation Mechanisms for the CPU Clock
The CPU clock signal can be generated via different mechanisms. The duration of TCLs and their
variation (and also the derived external timing) depends on the used mechanism to generate f
CPU
.
This influence must be regarded when calculating the timings for the C163-L.
Note:
The example for PLL operation shown in the figure above refers to a PLL factor of 4.
The used mechanism to generate the CPU clock is selected during reset via the logic levels on pins
P0.15-13 (P0H.7-5).
The table below associates the combinations of these three bits with the respective clock generation
mode.
TCLTCL
TCLTCL
f
CPU
f
OSC
f
CPU
f
OSC
Phase Locked Loop Operation
Direct Clock Drive
TCL
TCL
f
CPU
f
OSC
Prescaler Operation
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