GENERAL RELEASE SPECIFICATION
August 27, 1998
14.2 EXTERNAL TEMPERATURE SENSOR
In fast charge control applications, where close monitoring of the charging pro-
cess is required (especially temperature), an external temperature sensor (ther-
mistor) is recommended. This external thermistor connects to the TM pin (see
Figure 14-2), and its voltage measured via channel 4 (AN4, see Analog Sub-
system section) of the Analog Subsystem. For faster temperature response time
and more accurate measurement (required for fast charge control), the thermistor
should be mounted directly to the battery pack.
Batt+
MC68HC05SB7
VM
V
DD
TM
Batt–
Thermistor
Figure 14-2. External Temperature Sensor Connection
14.3 TEMPERATURE SENSOR OPERATION DURING WAIT MODE
During WAIT mode the temperature sensor continues to operate normally.
14.4 TEMPERATURE SENSOR OPERATION DURING STOP MODE
In STOP mode the temperature sensor is disabled.
MOTOROLA
14-2
TEMPERATURE SENSOR
MC68HC05SB7
REV 2.1
FREESCALE [ Freescale ]
