Wavecom GX64 Application Note page 9

2.2.1.2 Battery Thermistor
The battery thermistor can be of either PTC or NTC type. The resistor value of both
the thermistor and the bias resistor shall be selected so that the most optimal ADC-
range is available. The slope of the Thermistor curve is not important.
Wireless
CPU type
GS64
GR64001
GR64002
GR64002
There are four temperatures that must be calibrated (low, resume_low, resume_high,
high).
Temp mode
low
resume_low
resume_high
high
Gx64 APPLICATION NOTE
Charging Interface
Page: 9/20
VREF level Description
1.8V R , R
BIAS
2.8V R , R
BIAS
1.8V to 2.8V R , R
BIAS
The value of R
>2.8V to 5.0V voltage level on ADIN1 does not exceed 2.5V at
any extreme temperature.
Temp
Description
(°C)
Low temperature limit. Charging will be suspended if
0
temperature goes below this limit.
Charging resume level. After the low limit has been
+4 reached, charging will not resume until temperature
exceeds this level.
Charging resume level. After the high limit has been
+36 reached, charging will not resume until temperature
is below this level.
High temperature limit. Charging will be suspended
+40
if temperature goes above this limit.
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values should be the same.
TH nom
values should be the same.
TH nom
values should be the same.
TH nom
should be selected so that the
BIAS