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STR720 Datasheet(PDF) 341 Page - STMicroelectronics

No. de pieza STR720
Descripción Electrónicos  ARM720T 16/32-BIT MCU WITH 16K RAM, USB, CAN, 3 TIMERS, ADC, 6 COMMUNICATIONS INTERFACES
PDF  401 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STR720 Datasheet(HTML) 341 Page - STMicroelectronics

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STR720 - S-D ANALOG/DIGITAL CONVERTER (ADC)
341/401
ADC Clock Prescaler Register (ADCCPR)
Address Offset: 30h
Reset Value: 0006h
Bits 15:7 = Reserved. These bits should be always written as ‘0’.
Bits 6:0 = PRESC[6:0]: Prescaler value
The 7 bit binary value specified on the clock prescaler register determines the factor by which
the ADC input clock will be divided down in order to produce the oversampling clock of the
sigma-delta modulator, the actual factor being twice the PRESC register value as illustrated in
Table 70 on page 341. The value placed in this register must subsequently generate an
oversampling clock frequency not greater than 4 MHz from the master clock applied to the
ADC. These bits can only be written by software, any read operation on them returns 0h.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reserved
PRESC[6:0]
-w
Table 70. ADC Prescaler setting
Setting
Divide Factor
0
Not available (ADC frozen)
1
Not available (ADC frozen)
24
36
48
..
..
126
252
127
254



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