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A1360 Datasheet(PDF) 19 Page - Allegro MicroSystems

Part No. A1360
Description  Low-Noise Programmable Linear Hall Effect Sensor ICs with
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Maker  ALLEGRO [Allegro MicroSystems]
Homepage  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

A1360 Datasheet(HTML) 19 Page - Allegro MicroSystems

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A1360, A1361,
and A1362
Figure 6. Pulses to enter Try mode, zone 2. Example shown is
for addressing the Fine Quiescent Voltage Output register. After
addressing desired code, cycle the supply to reset the bit field or apply
a blow pulse to make the parameter value permanent.
Blow Mode
After the required value of the programmable parameter is
addressed using Try mode, its corresponding code can be blown
to make its value permanent. To do this, select the required
parameter register and the appropriate code. (See the Fuse Blow-
ing section. Recall that each bit of a desired code must be blown
individually before cycling the supply.) If the desired parameter
is in the first zone, enter the appropriate key-code combination
and then apply two high-level voltage pulses followed by an
additional blow pulse. If the desired parameter is in the second
zone, enter the appropriate key-code combination and then apply
a single blow pulse on the VOUT pin. This is diagrammed as
follows:
Zone 1: VPH → Key → VPH → Code for Single Bit → VPH
VPH → VPH
Zone 2: VPH → VPH → VPH → Key → VPH → Code for
Single Bit → VPH
Note: During a single blowing sequence, only one programmable
parameter in a single zone should be set at a time. After each
blow sequence the supply should be cycled before attempting to
blow additional bits.
Lock Mode
To lock the device, address the LOCK bit and apply a blow pulse
with CBLOW in place. The LOCK bit is located in zone 2, register
2, code 4. After locking the device, no future programming of any
parameter is possible.
The lock sequence is:
VPH → VPH → VPH → VPM → VPM →VPH → VPM → VPM
→ VPM → VPM → VPH
Low-Noise Programmable Linear Hall Effect Sensor ICs with
Adjustable Bandwidth (50 kHz Maximum) and Analog Output
19
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com


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