參數(shù)資料
型號： ST52513F3
廠商： STMICROELECTRONICS
元件分類： 微控制器/微處理器
英文描述： MICROCONTROLLER, PDSO20
封裝： ROHS COMPLIANT, SOP-20
文件頁數(shù)： 103/136頁
文件大?。?/td> 2791K
代理商： ST52513F3
10.3.4 Multiple Channels Continuous Mode.
In this mode (CONT=1, SEQ=1) a continuous
conversion flow is entered by a start event on the
selected channel sequence. The CH2-0 bits
indicate the last channel of the sequence.
At the end of each conversion the relative Input
Registers are updated with the last conversion
results, while the former values are lost.
The conversion continues until a stop command is
executed by writing a ‘0’ in the apposite AD_CR
Configuration Register bit STR.
10.4 Power Down Mode
Before enabling any A/D operation modes, set the
Power On bit (POW) of the Configuration Register
AD_CR to ‘1’ and then start the A/D Converter by
setting the STR bit. It is suggested to execute the
pre-charging after the Power on to speed-up the
auto calibration process. Clearing the Power On bit
is useful when the A/D is not used, reducing the
total chip power consumption. This state is also the
reset configuration and it is forced by hardware
when the core is in HALT state (after a HALT
instruction execution).
10.5 A/D Converter Register Description
The following registers are related to the use of the
A/D Converter.
10.5.1 A/D Converter Configuration Registers.
A/D Converter Control Register 1 (AD_CR1)
Configuration Register 8 (08h) Read/Write
Reset Value: 0000 0000 (00h)
Bit 7-5: CH2-CH0 Channel Number
The number specified identifies the number
of channels to be converted (Multiple
Channel mode) or the channel to be
converted (One Channel mode)
Bit 4: SCK A/D speed mode
0: Slow mode (800 kHz)
1: Fast mode (1600 kHz)
Bit 3: SEQ One/Multiple Channel Mode
0: One Channel Mode
1: Multiple Channel Mode
Bit 2: POW A/D Converter Power Down/Up
0: Power down
1: Power up
Bit 1: CONT Single/Continuous Mode
0: Single Mode
1: Continuous Mode
Bit 0: STR A/D Converter Start bit
0: A/D Converter stopped
1: A/D Converter started
A/D Converter Control Register 2 (AD_CR2)
Configuration Register 47 (02Fh) Read/Write
Reset Value: 0000 0000 (00h)
Bit 7-5: not used
Bit 4: PRECH Pre-charging process on/off
0: Pre-charge on (default)
1: Pre-charge off
Bit 3: REF Voltage Reference (VREF) source
0: Internal from Vdd
1: External from VREF pin
Bit 2: RESOL 8/10 bits resolution
0: 10 bits
1: 8 bits
Bit 1: INT1 Overflow interrupt mask
0: interrupt disabled
1: interrupt enabled (if MSKAD=1)
Bit 0: INT0 End of Conversion interrupt mask
0: interrupt disabled
1: interrupt enabled (if MSKAD=1)
70
CH2
CH1
CH0
SCK
SEQ
POW
CONT
STR
70
-
PRECH
REF
RESOL
INT1
INT0
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