參數(shù)資料
型號(hào)： SAK-TC1765T-L40EB
廠商： INFINEON TECHNOLOGIES AG
元件分類： 微控制器/微處理器
英文描述： 32-BIT, MROM, 40 MHz, MICROCONTROLLER, PBGA260
封裝： PLASTIC, LBGA-260
文件頁(yè)數(shù)： 50/88頁(yè)
文件大?。?/td> 1274K
代理商： SAK-TC1765T-L40EB
TC1765
Data Sheet
50
V1.2, 2002-12
Preliminary
Clock Generation Unit
The Clock Generation Unit (CGU) in the TC1765, shown in Figure 16, consists of an
oscillator circuit and a Phase-Locked Loop (PLL). The PLL can convert a low-frequency
external clock signal to a high-speed internal clock for maximum performance. The PLL
also has fail-safe logic that detects degenerate external clock behavior such as abnormal
frequency deviations or a total loss of the external clock. It can execute emergency
actions if it looses its lock on the external clock.
In general, the CGU is controlled through the System Control Unit (SCU) module of the
TC1765.
Figure 16
Clock Generation Unit Block Diagram
M C A 04974
O scilla tor
Circu it
XT AL 1
XT AL2
&
f
OS C
Ph a se
Detec t.
VC O
N
Divid er
PLL
f
VC O
f
SYS
S yste m _
CLK
Lock
Dete ctor
OS C _ OK
D e ep
Slee p
BY PAS S
1
0
MU X
Clock Generation Unit
CGU
System C ontrol U nit
SC U
K
Divid e r
Re giste r PLL _ CL C
KD IV
L O C K
PL L BYP
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