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A1365LKTTN-5-T Datasheet(PDF) 27 Page - Allegro MicroSystems

Part No. A1365LKTTN-5-T
Description  Low-Noise, High-Precision, Programmable Linear Hall-Effect Sensor IC
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Maker  ALLEGRO [Allegro MicroSystems]
Homepage  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

A1365LKTTN-5-T Datasheet(HTML) 27 Page - Allegro MicroSystems

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Low-Noise, High-Precision, Programmable Linear Hall-Effect Sensor IC
With High-Bandwidth (120 kHz) Analog Output and Integrated Fault Comparator
A1365
27
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Synchronize
MSB
MSB
Manchester Code per G. E. Thomas
Bit boundaries
Memory Address
Data
CRC
Read/Write
0 0 0/1 0/1 0/1 0/1 0/1 0/1
0
0
0 1 1
0/1 0/1 0/1 0/1
0/1
0/1
. . .
0/1 0/1
Synchronize
Bit boundaries
VCC(V)
VMAN(L)
tMAN_VCC
VMAN(H)
0 V
Memory Address
Data
CRC
Read/Write
0 0 0/1
0 0
0
1
0/1
Figure 26: General Format for Serial Interface
Commands
Figure 27: VCC Levels During Manchester Communication
Serial Interface Message Structure
The general format of a command message frame is shown in
Figure 26. Note that, in the Manchester coding used, a bit value
of one is indicated by a falling edge within the bit boundary, and
a bit value of zero is indicated by a rising edge within the bit
boundary.
VCC Levels During Manchester Communica-
tion
For all devices with UVLO functionality, after power-up, it
is important that the VCC pin be held at VCC until the first
Synchronization pulse of a read/write transaction is sent (see
Figure 27). During the transaction, the VCC pin varies between
VMAN(H) and VMAN(L), but after the last CRC bit has been sent,
the controller must bring the VCC pin back to the VCC level in
less than tMAN_VCC. This is important in order to avoid triggering
the UVLO functionality during EEPROM read/write.
Serial Interface Command General Format
Quantity
of Bits
Parameter Name
Values
Description
2
Synchronization
00
Used to identify the beginning of a serial interface command
1
Read/Write
0
[As required] Write operation
1
[As required] Read operation
6
Address
0/1
[Read/Write] Register address (volatile memory or EEPROM)
30
Data
0/1
24 data bits and 6 ECC bits
3
CRC
0/1
Incorrect value indicates errors


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