Owner manual

MAXQ1004
1-Wire and SPI Authentication Microcontroller
16
Any Schottky diode used should have a leakage well
below the maximum drive current of the sourcing device.
Diodes with low reverse leakage currents are available
from many vendors.
Additional Documentation
Designers must have the following documents to fully
use all the features of this device. This data sheet
contains pin descriptions, feature overviews, and elec-
trical specifications. Errata sheets contain deviations
from published specifications. The user’s guides offer
detailed information about device features and opera-
tion. The following documents can be downloaded from
www.maxim-ic.com/microcontrollers.
• This MAXQ1004 data sheet, which contains electrical/
timing specifications, pin descriptions, and package
information.
• The MAXQ1004 revision-specific errata sheet
(www.maxim-ic.com/errata).
• The MAXQ1004 User’s Guide, which contains detailed
information on core features and operation, including
programming.
Development and
Technical Support
Maxim and third-party suppliers provide a variety of
highly versatile, affordably priced development tools for
this microcontroller, including the following:
• Compilers
• In-circuit emulators
• Integrated Development Environments (IDEs)
• Serial-to-JTAG converters for programming and
debugging.
A partial list of development tool vendors can be found
at www.maxim-ic.com/MAXQ_tools.
For technical support, go to https://support.maxim-ic.
com/micro.
Typical Application Circuit
The 1-Wire interface can be used to authenticate a
3-contact battery pack and also measure the battery
voltage and temperature. See Figure 4 for a typical appli-
cation circuit.
Figure 3. I/O Protection
V
DD
GND
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
1kΩ
INTERNAL
CIRCUIT
INTERNAL
CIRCUIT
NOT SUBJECT TO
NEGATIVE VOLTAGE OR ESD
LOW-LEAKAGE
SCHOTTKY DIODE
EXTERNAL CONNECTION
EXPOSED TO ESD
µC
USER APPLICATION