MAX11068EVKIT+ Maxim Integrated Products, MAX11068EVKIT+ Datasheet - Page 15

• 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: -

All device alerts are monitored from the Alert/Status
tab (Figure 9). The right side of the tab is divided into
two group boxes: Status_ Flags_ (STATUS) and Alert_
Status_ (ALRTCELL,_ ALRTOVCELL,_ ALRTUVCELL).
The Status_ Flags_ (STATUS) group box displays the
alerts from the STATUS (0x02) register. The_Alert_Status_
(ALRTCELL,_ALRTOVCELL,_ALRTUVCELL) group box
displays the alerts from the ALRTCELL (0x03), ALRTOV
(0x04), and ALRTUV (0x05) registers. Refer to the
Auxiliary Analog Inputs and External Thermistor Supply
Pin and Self-Diagnostics sections in the MAX1068 IC
data sheet for additional information.
Each group box contains buttons that are associated
with that register’s alert bits. When performing a read
of these alert registers, the state of each alert bit is dis-
played on the buttons’ faces. To clear an alert, a zero
must be written to the bit position assigned to that spe-
cific alert. An alert is cleared by:
1) Selecting the alerts to be cleared:
2) Writing to the alert register(s):
The alerts can be disabled by setting their associated
alarm enable bit(s) to 0. The alarm enable bits for the
status alerts are located in the ADCCFG (0x08) register.
In addition, the AIN1 and AIN2 registers each contain
2 bits (HOTEN and COLDEN) that provide secondary
enabling/disabling of the overtemperatue and undertem-
perature alerts (ALRTTHOT and ALRTTCOLD).
The alarm enable bits for the ALRTOV and ALRTUV alerts
are located in the OVALRTEN (0x06) and UVALRTEN
(0x07) registers, respectively. The ALRTCELL alerts
result from an ALRTOV or ALRTUV alert. Thus, to dis-
able an ALRTCELL alert, both the ALRTOV and ALRTUV
alerts for that cell must be disabled (i.e., to disable cell
12’s alert (AL12), the OV12 and UV12 enable bits must
be set to 0).
The MAX11068 alert and alarm functions are enabled/
disabled by checking/unchecking the Enables tab
(Figure 10) checkboxes and then pressing either the
Configure_Active_Device or the Configure_All_Devices_
button. When enabled, the overvoltage and undervolt-
• Press the button displaying the alert. The but-
• Press the Clear_Active_Device button to clear
• Press the Clear_All_Devices button to clear the
ton’s label changes from 1 to 0.
the selected alerts of the active device (see the
Active_Device drop-down list), or
selected alerts of all devices in the chain.
_______________________________________________________________________________________ _ 15
Alert/Status Tab
Enables Tab
MAX11068 Evaluation System
age alerts can be monitored and cleared using the
buttons on the Alert/Status tab. See the Alert/Status
Tab section. The overvoltage and undervoltage alert
enable bits are contained in their register’s lower 12 bits
(_VALRTEN[11:0]).
The General_Configuration_(ADCCFG) group box pro-
vides ALRM_ checkboxes to enable/disable additional
MAX11068 alert functions. These alerts are monitored
and cleared using the buttons on the Alert/Status tab.
The ADCCFG register is also used to enable self-diag-
nostic measurements (DIAGEN), enable conversions on
the AUXIN1 and AUXIN2 inputs (AIN1EN and AIN2EN),
and initiate an ADC scan. See the ADC Scan section for
further scan details and refer to Table 13 in the IC data
sheet for ADCCFG bit descriptions.
The Configuration tab (Figure 11) is divided into
four group boxes: General_ Purpose_ I/O_ (GPIO),
Cell_ Balancing_ (BALCFG),_ ADC acquisition_ time
(ACQCFG), and ADC_Scan_(CELLEN)_–_Global_Setting.
Table 10 lists the configuration controls and their func-
tions.
This register tab (Figure 12) is used to change the
broadcast address, read back each device’s version
number, and configure the I
broadcast address and version number are contained
in the MAX11068 device registers, whereas the clock
frequency is an interface configuration associated with
the MINIQUSB command module.
Broadcast_Address: The broadcast address is used by
the host controller to communicate with all the devices
in the SMBus ladder. This address is used by the host
when executing roll call, write all, and read all com-
mands. The broadcast address is contained in the lower
8 bits ([7:0]) of the 16-bit BROADCAST ADDRESS regis-
ter and can be set in the 0x00 (0000 0000) through 0x7E
(0111 1110) range. The Broadcast_Address combo box
provides a list of selectable addresses and allows a valid
address to be entered into the edit box.
Model_ and_ Version_ Number: The lower nibble of the
Version register (VER[3:0]) contains the IC’s version
number. The upper 12 bits (VER[15:4]) contain the
MAX11068 model number, which is set to 0x068 (0000
0110 1000). The Version register is a read-only register.
I2C_Clock_Frequency: The I
figured using the controls in the I2C_ Clock_ Frequency_
group box. The Multiplier and Exponent drop-down
lists show the current or desired clock frequency.
Broadcast/Version/Freq Tab
2
C clock frequency is con-
2
C clock frequency. The
Configuration Tab