Technical data

DRM043/D — Rev 0 Designer Reference Manual
MOTOROLA 19
Designer Reference Manual — DRM043/D
Section 3.
3.1 Contents
3.2 Test Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
3.3 Extra Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
3.4 Further Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
3.5 Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
3.2 Test Description
The solution was tested with one 3.6V Li-ion battery cells using a +5V
power supply (HP6236B)
3.3 Extra Features
There is a useful subroutine included in the file QY2CHGR_INC.asm. It
is DSRL_OUT which is a serial RS232 data transmit routine. It uses
PTA3 as the data line to serial out the data. The baud rate is 19200bps
when the ICG of QT2 is trimmed at bus frequency 3.2MHz. The data line
is output to a standard RS232 interface circuit that connected to the
COM port of a PC. This routine is helpful in project development as
developer can monitor the battery charging status and got the charging
parameters such as voltage, temperature and current for analysis.
Since ICG is used, some fine tune might need on the bit delay routines
if the bus frequency cannot be tuned to exactly to 3.2MHz bus frequency.
When calling this routine, the interrupt mask bit is set to avoid interrupt,
and the mask interrupt bit will be clear before leave this subroutine.
When development of the software is completed. The called of this
routine is not necessary and should be removed and the PTA3 is set it
back to control the LEDs.
Frees
cale Semiconductor,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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