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| MC68HC05JJ6 Datasheet, PDF (124/216 Pages) Freescale Semiconductor, Inc – General Release Specification Microcontrollers | |||
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Analog Subsystem
VCAP
VX
tDIS
tDIS
(MIN)
tMAX
tCHG
tDIS
(MIN)
VMAX
VX = tCHG x ICHG
CEXT
CHG
COMP2
TOF
OCF
ICF
0
1
2
3
45
1
Point
Action
Software/Hardware Action
Begin initial discharge and select mode 0
0
by clearing the CHG, ATD2, and ATD1 Software write
control bits in the ACR
1 VCAP falls to VSS.
Wait out minimum tDIS time
2
Stop discharge and begin charge by setting
CHG control bit in ACR.
Software write
3
VCAP rises to VX and comparator 2 output
trips, setting CPF2 and CMP2.
Wait out tCHG time
4 VCAP reaches VMAX.
None
Begin next discharge by clearing the CHG
5
control bit in the ACR. Reset CPF2 by
Software write
writing a 1 to CPFR2.
Dependent Variable(s)
Software
VMAX, IDIS, CEXT
Software
VX, ICHG, CEXT
VMAX, ICHG, CEXT
Software
Figure 8-8. A/D Conversion â Full Manual Control (Mode 0)
General Release Specification
124
Analog Subsystem
MC68HC05JJ6/MC68HC05JP6 â Rev. 3.2
Freescale Semiconductor
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