MAX17201 Datasheet, PDF (63/115 Pages) Maxim Integrated Products – Stand-Alone ModelGauge m5 Fuel Gauge

MAX17201/MAX17205/
MAX17211/MAX17215
Stand-Alone ModelGauge m5 Fuel Gauge
with SHA-256 Authentication
enMMV: Enable MinMaxVolt Backup. Set this bit to
enable storage of MinMaxVolt register information into
the nMinMaxVolt register during save operations. There
is no corresponding restore option. When this bit is clear
nMinMaxVolt can be used as general-purpose memory.
enMMT: Enable MinMaxTemp Backup. Set this bit to
enable storage of MinMaxTemp register information into
the nMinMaxTemp register during save operations. There
is no corresponding restore option. When this bit is clear
nMinMaxTemp can be used as general-purpose memory.
enSOC: Enable MixSOC and VFSOC Backup. Set this
bit to enable storage of MixSOC and VFSOC register
information into the nSOC register during save opera-
tions. There is no corresponding restore option. When this
bit and nNVCfg0.enAF are clear nSOC can be used as
general purpose memory. Note that enSOC should not be
set simultaneously with nNVCfg0.enAF (AgeForecasting).
enT: Enable TimerH backup and restore. Set this bit to
enable TimerH register to be backed up and restored by
the nTimerH register. When this bit is cleared, TimerH
restores with its alternate initialization value and nTimerH
can be used as general-purpose memory.
ShdnTimer Register (03Fh)
Register Type: Special
Nonvolatile Backup: None
Initial Value: 0x0000
The ShdnTimer register sets the timeout period from when
a shutdown event is detected until the device disables the
regulators and enters low-power mode. Figure 41 shows
the ShdnTimer register format.
CTR: Shutdown Counter. This register counts the total
amount of elapsed time since the shutdown trigger event.
This counter value stops and resets to 0 when the shut-
down timeout completes. The counter LSb is 1.4s
THR: Sets the shutdown timeout period from a minimum
of 45s to a maximum of 1.6h. The default POR value of 0h
gives a shutdown delay of 45s in active mode. In default
hibernate mode, the minimum shutdown time is 12 min-
utes. The equation setting the period is:
Shutdown Timeout Period = 175.8ms • 2^(8+THR) in active
mode
nConfig Register (1B0h)
Register Type: Special
Nonvolatile Restore: Config (01Dh) and Config2 (0BBh) if
nNVCfg0.enCfg is set.
Alternate Initial Value: 0x2210 for Config, 0x0050 for
Config2
The nConfig register holds all shutdown enable, alert
enable, and temperature enable control bits. Writing a bit
location enables the corresponding function within one
task period. Figure 42, Figure 43, and Figure 44 show the
register formats.
0: Bit must be written 0. Do not write 1.
1: Bit must be written 1. Do not write 0.
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
THR
CTR
Figure 41. ShdnTimer (03Fh) Format
D15 D14 D13 D12 D11 D10 D9
0 SS TS VS ALRTp AINSH Ten
Figure 42. nConfig (1B0h) Format
D8 D7
D6
D5 D4 D3 D2 D1
D0
Tex SHDN COMMSH ALSH 1 FTHRM Aen dSOCen TAlrtEn
D15 D14 D13 D12 D11 D10 D9
0
SS TS VS ALRTp AINSH Ten
Figure 43. Config (01Dh) Format
D8 D7
D6
D5 D4 D3 D2 D1 D0
Tex SHDN COMMSH 0 ETHRM FTHRM Aen Bei Ber
D15 D14 D13 D12 D11 D10 D9 D8 D7
D6 D5 D4 D3 D2 D1
D0
0
0
0
0
0
0
0
0 dSOCen TAlrtEn 0
1
0
0
0 POR_CMD
Figure 44. Config2 (0BBh) Format
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