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參數(shù)資料
| 型號(hào)： | ST52X420 |
| 廠商： | 意法半導(dǎo)體 |
| 元件分類： | ADC |
| 英文描述： | 8-BIT INTELLIGENT CONTROLLER UNIT (ICU) Three Timer/PWMs, ADC, WDG |
| 中文描述： | 8位智能控制器病房（ICU）3個(gè)定時(shí)器/的PWM，ADC的，水分散粒劑 |
| 文件頁(yè)數(shù)： | 48/84頁(yè) |
| 文件大?。?/td> | 1274K |
| 代理商： | ST52X420 |
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ST52T410/ST52T420/E420
48/84
If input voltage is less than V
SS
(voltage reference
low) then the result is equal to 00h.
The A/D converter is linear and the digital result of
the conversion is provided by the following
formula:
Where Reference Voltage is V
dda
- V
ss
.
The accuracy of the conversion is described in the
Electrical Characteristics Section.
The A/D converter is not affected by the WAIT
mode.
When the MCU enters HALT mode with A/D
converter enabled, the converter is disabled until
HALT mode is terminated and the start-up delay
has elapsed. A stabilization period is also required
before accurate conversions can be performed.
Figure 8.2 Conf. Register (REG_CONF 3)
8.2.1 Operating Modes.
Four main operating modes can be selected by
setting the values of the LP and SEQ bit in the A/D
configuration Register.
One Channel Single Mode
In this mode (
SEQ =
‘
0
’’
, LP =
‘
0
’
) the A/D provides
an EOC signal after the end of channel i-th
conversion; then the A/D waits for a new start
event. Channel i-th is identified by the bit CH0,
CH1, CH2.
i.e CH(2:0) =
‘
011
’
means conversion of channel 3
then stop.
Multiple Channels Single Mode
In this mode (
SEQ =
‘
1
’
, LP =
‘
0
’
) the A/D provides
an EOC signal after the end of the channels
sequence conversion identified by the bit CH0,
CH1, CH2; then the A/D waits for a new start event.
i.e. CH(2:0) =
‘
011
’
means conversion of channels
0,1,2 and 3 then stop.
Digitalresult
inputVoltage
referenceVoltage
255
=
D 7 D0
CH2 CH1 CH0 SCK SEQPOW
LP STR
REG_CONF 3
START/STOP
CONVERSION MODE SEL.
ON/OFF A/D
CONVERSION MODE SEL.
CLOCK SELECTOR
CHANNELS SEL.
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