MAX11068EVKIT+ Maxim Integrated Products, MAX11068EVKIT+ Datasheet - Page 23

• Manufacturer Part Number: MAX11068EVKIT+
• Description: KIT SMART BATT MEASUREMENT 12CH
• Manufacturer: Maxim Integrated Products

Specifications of MAX11068EVKIT+

• Main Purpose: Power Management, Battery Monitor, Car
• Utilized Ic / Part: MAX11068
• Primary Attributes: Monitors Current, Voltage, Temperature
• Secondary Attributes: 1 ~ 12 Cell- Li-Ion, 1 ~ 12 Cell- NiMH
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Embedded: -

The software features a Save_ Register_ Configuration
and Load_Register_Configuration function. This allows
all current register configurations and GUI control set-
tings to be saved and loaded at a later time. When
saving, the software first performs a read of all the
registers of each device in the SMBus ladder to obtain
their current configurations. Once complete, a Save_All_
Data dialog box appears asking for a file name and type
(the default is 11068config.csv). When loading, a Load_
Configuration file window appears asking for a file to
open (the default is 11068config.csv). The load function
configures the GUI, writes the data from the file to the
registers of all the devices in the SMBus ladder, and
finishes by performing a read of all the selected device
registers.
Note: Read-only data is not saved to the configuration
file. Only configurable options are saved to the configu-
ration file.
The EV kit software supports packet-error checking
(PEC) by implementing a CRC-8 algorithm to maintain
data integrity with the devices in the SMBus ladder.
The software generates the PEC byte when executing
the SETLASTADDRESS, WRITEALL, and WRITEDEVICE
commands and verifies the PEC byte received from
the devices after a READALL command. The software
makes this algorithm available as a PEC calculator,
which is found under the Tools menu. Figure 14 provides
a snapshot of the PEC calculator.
The MAX11068 evaluation kit (EV kit) is designed to
allow for a thorough evaluation of the MAX11068 smart
data-acquisition interface. The EV kit PCB is made up of
two boards, each containing nearly identical MAX11068
circuits. The left side of the EV kit is referenced as side
(A) and the right side is referenced as side (B). The two-
boards-in-one design provides a simple demonstration
Figure 14. PEC Calculator
Detailed Description of Hardware
Save/Load Register Configuration
_______________________________________________________________________________________ _ 23
MAX11068 Evaluation System
PEC Byte
of the MAX11068’s SMBus ladder capability. The addi-
tional dual-row headers (J1 and J102) provided on each
board allow for a 31-device (max) SMBus ladder. Each
side of the EV kit consists of several sections to facilitate
the evaluation of the MAX11068 devices.
The MAX11068 device can be configured to operate
with 2 to 12 battery cells. The cells can be directly con-
nected to the EV kit, or can be routed through header P3.
See the Battery Cells section. The EV kit also facilitates
monitoring the alarm pins, utilizing the auxiliary pins, and
accessing the general-purpose input/output (GPIO) pins.
The EV kit also includes two MAX11080 circuits that
complement the MAX11068 devices, providing addition-
al overvoltage and undervoltage monitoring. In addition,
the MAX11080 devices are each capable of monitoring
up to 12 battery cells and can also be daisy-chained with
up to 31 devices.
The J3 connector, located on side (A) of the EV kit, is
used to connect with Maxim’s MINIQUSB command
module, which provides I
nected to the MINIQUSB command module, the EV kit
can be evaluated with EV kit software. See the Detailed
Description of Software section.
When evaluating the MAX11068 EV system, both the
MAX11068 IC data sheet and this document should be
referenced.
One EV kit includes two connected boards. This design
demonstrates the cascading ability of the MAX11068
device. The left side of the EV kit is referenced as the (A)
side and the right side of the EV kit is referenced as the
(B) side. Both boards contain the same circuit design,
with the exception of host interface headers (P2) located
on the (A) side of the EV kit.
The two boards are mechanically connected at the cen-
ter of the EV kit and are electrically connected with a
Reference Designators and
2
C communication. When con-
IC Pin Net Names