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STR720 Datasheet(PDF) 144 Page - STMicroelectronics

Part # STR720
Description  ARM720T 16/32-BIT MCU WITH 16K RAM, USB, CAN, 3 TIMERS, ADC, 6 COMMUNICATIONS INTERFACES
PDF  401 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STR720 Datasheet(HTML) 144 Page - STMicroelectronics

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STR720 - RESET AND CLOCK CONTROL UNIT (RCCU)
144/401
Bit 5:0 = MX[5:0]: PLL Multiplication Factor.
This bit field selects the multiplier factor used to generate PLL output clock from its input
reference clock. Refer to Table 37 for multiplier settings
WARNING Not all clock selections are possible and setting the system clock to any
unsupported frequency may cause the system to malfunction. In this case the only way to
start again is a hardware reset. For the allowed values, refer to section 25 on page 364.
1
0
PLLCLKREF/4
1
1
PLLCLKREF/8
Table 37. PLL multiplication factors
MX5
MX4
MX3
MX2
MX1
MX0
Multiply factor
0 to 7
N/A
000111
8
001000
9
001001
10
...
...
...
...
...
...
...
001111
16
010000
17
...
...
...
...
...
...
...
011111
32
100000
33
...
...
...
...
...
...
...
111111
64
Table 36. PLL divider settings
1



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