A1184_06 ALLEGRO [Allegro MicroSystems], A1184_06 Datasheet - Page 12

• Manufacturer Part Number: A1184_06
• Description: Standard Two-Wire Field-Programmable Chopper-Stabilized Unipolar Hall-Effect Switches
• Manufacturer: ALLEGRO [Allegro MicroSystems]

A1184
Enabling Addressing Mode.
keying sequence used to enable the bitfield addressing mode. As
shown in figure 7, this segment consists of one short V
one V
ruptions. This sequence is designed to prevent the device from
being programmed accidentally, such as by noise on the supply
line.
Address Selection.
target bitfield address, is indicated by a series of V
shown in figure 8.
Lock Bit Programming.
is programmed, and all of the corresponding bitfield-level fuses
are blown, the device-level fuse should be blown. To do so, the
lock bit (bitfield address 32) should be encoded as 1 and have
its fuse blown. This is done in the same manner as permanently
setting the other bitfields, as shown in figure 9.
PM
pulse, and one short V
After addressing mode is enabled, the
After the desired B
The first segment of code is a
PH
pulse, with no supply inter-
Chopper-Stabilized Unipolar Hall Effect Switch
OP
calibration value
PM
Standard Two-Wire Field-Programmable
pulses, as
PH
pulse,
V
V
V
V
V
V
V
V
V
PM
PH
PM
PH
PL
PL
PH
PM
0
0
PL
0
V+
V+
V+
Figure 9. Pulse sequence to encode lock bit
Figure 7. Addressing mode enable pulse sequence
Figure 8. Pulse sequence to select addresses
Falling edge of final B
Enable
Address 1
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
Address 2
OP
Encode Lock Bit
address digit
32 pulses
Address
Address n ( ≤ 31)
t
t
Blow
t
12