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| 型号： | A1192LLHLT-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 10/18页 |
| 文件大小： | 383K |
| 描述： | IC HALL EFFECT SWITCH SOT-23-3 |
| 特色产品： | A119x Switches |
| 标准包装： | 1 |
| 类型： | 单极开关 |
| 电源电压： | 3 V ~ 24 V |
| 电流 - 电源： | 6.9mA |
| 输出类型： | 数字 |
| 特点： | 可编程 |
| 工作温度： | -40°C ~ 150°C |
| 封装/外壳： | SOT-23W |
| 供应商设备封装： | SOT-23W |
| 包装： | 标准包装 |
| 其它名称： | 620-1391-6 |
Programmable, Chopper-Stabilized,
Two Wire Hall-Effect Switches
A1190, A1192,
and A1193
10
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Table 2. Programming Logic Table
Register
Bit Field Address (Code)
Description
Key
Name
Binary Format
[MSB ?LSB]
Decimal
Equivalent
Try Mode
0 B
OP
Trim Up Counting
000000
0
Initial value (below minimum |B
OP
| ) (Try mode sequence
starts with code 1); Code corresponds to bit field value (code
1 selects bit field value 000001)
111111
63
Maximum selectable value (above maximum |B
OP
| )
1 B
OP
Trim Down Counting
111111
0
Initial value (above maximum |B
OP
| ) (Try mode sequence
starts with code 1); Code is automatically inverted (code 1
selects bit field value 111110)
000000
63
Minimum selectable value (below minimum |B
OP
|)
7 Fuse Check
000111
7
Check integrity of all fuse bits versus low threshold
001111
15
Check integrity of all fuse bits versus high threshold
Blow Mode
0 B
OP
Trim
000000
0
Initial value (below minimum |B
OP
| ); (Only allows selection
of 1 bit per sequence)
111111
63
Maximum selectable value (above maximum |B
OP
| ); (Only
allows selection of 1 bit per sequence)
7 Programming Lock
001000
8
Locks out access to all registers except Fuse Check
Code. The number used to identify the combination of fuses
activated in a bit field, expressed as the decimal equivalent of the
binary value. The LSB of a bit field is denoted as code 1, or bit 0.
Addressing. Setting the bit field code in a selected register by
serially applying a pulse train through the VCC pin of the device.
Each parameter can be measured during the addressing process,
but the internal fuses must be blown before the programming
code (and parameter value) becomes permanent.
Fuse Blowing. Applying a V
PH
pulse of sufficient duration to
permanently set an addressed bit by blowing a fuse internal to the
device. Once a bit (fuse) has been blown, it cannot be reset.
Blow Pulse. A V
PH
pulse of sufficient duration to blow the
addressed fuse.
Cycling the Supply. Powering-down, and then powering-up the
supply voltage. Cycling the supply is used to clear the program-
ming settings in Try mode.
Programming Procedure
Programming involves selection of a register, a mode, and then
setting values for parameters in the register for evaluation or for
fuse blowing. Figure 10 provides an overview state diagram.
Register Selection Each programmable parameter can be
accessed through a specific register. To select a register, a
sequence of voltage pulses consisting of a V
PH
pulse, a series of
V
PM
pulses, and a V
PH
pulse (with no V
CC
supply interruptions)
must be applied serially to the VCC pin. The quantity of V
PM
pulses is called the key, and uniquely identifies each register. The
pulses for selection of register key 1, is shown in figure 5. No
V
PM
pulse is sent for key 0. The register selections are shown in
table 2.
Mode Selection After register selection, the mode is selected,
either Try or Blow mode. Try mode is selected by default. To
select Blow mode, that mode selection key must be sent.
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