ST52T441 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
ST52T441
STMicroelectronics
ST52T441 Datasheet PDF : 94 Pages
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ST52T400/T440/E440/T441
The four modes are selected by configuring
REG_CONF1[(2)] to choose among the conver-
sion of a single channel or a sequence of chan-
nels and REG_CONF1[(1)] to perform the
conversion once or continuously.
REG_CONF1[(5:3)] bits allows the user to choose
the channel to be converted in Single Channel
mode or the last channel to be converted (starting
from AC0) in Multiple Channels mode.
To start the conversion, REG_CONF16[(0)] must
be set to “1” and to “0” to stop it.
Note: in Single conversion modes, the Start bit
REG_CONF16[(0)] must be reset to 0 before
starting another conversion; in Comparator Mode
it must be set to ‘”0”.
Table 7.1 Configuration Register 1
Bit Name Value
0
0 REFM
1
Description
Convert only data
Convert data and
reference value
1 CONV
0
Single Conversion
1
Continuous Conversion
2
SEQ
0
1
Single Channel
Multiple Channel
3
000
Channel 0 AC0
001
Channel 1 AC1
4
010
Channel 2 AC2
CHAN
011
100
Channel 3 AC3
Channel 4 AC4
5
101
Channel 5 AC5
110
Not used
111
Not used
6
00
One Conversion
NBCV
01
7
10
Two Conversion
Three Conversion
11
Not Used
Reset Configuration Value = “00000000”
Table 7.2 Configuration Register 15
Bit
Name
Description
7:0
PRES(7:0)
Timer Prescaler (7:0)
Reset Configuration Value = “00000000”
The Analog Comparator in A/D Converter Mode
supplies an interrupt source. The interrupt signal
can be generated either after the end of the each
channel conversion (REG_CONF3[(4)]=0) or after.
the end of the conversion sequence
(REG_CONF3[(4)]=1).
Table 7.3 Configuration Register 3
Bit Name Value
Description
0 MODE
0
1
Comparator Mode
A/D Mode
1
REFV
0
1
Reference= GNDA
Reference = 2.42 V
2
POL
0
1
Rising crossing
Falling crossing
3 UPDW
0
1
Up Counter
Down Counter
4
INT
0
Interrupt after each
conversion
Interrupt after the end
1
of the conversion
cycle
000
Current generator off
5
001
10 µA charge current
010
20 µA charge current
CUR
6
011
30 µA charge current
100
40 µA charge current
101
50 µA charge current
7
110
60 µA charge current
111
70 µA charge current
Reset Configuration Value = “00000000”
Table 7.4 Configuration Register 16
Bit Name Value
Description
0 STRT
0
1
A/D Converter Stopped
A/D Converter Started
1
ADM
OD
0
1
Capacitor ramp
External ramp generator
2
Not used
3
7:4 PRES(11:8
Timer Prescaler (11:8)
Reset Configuration Value = “00000000”
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