GENERAL RELEASE SPECIFICATION
August 27, 1998
t
DIS
t
t
DIS
DIS
(MIN)
(MIN)
V
CAP
V
MAX
t
CHG
t
X I
CHG
CHG
V
V
=
X
X
C
X
CHG
COMP
TOF
OCF
ICF
0
1
2
3
1
2
Point
Action
Software/Hardware Action
Dependent Variable(s)
Begin initial Discharge and select
0
Mode 1 by clearing CHG and ATD2; Software write.
and setting ATD1 in the ACR.
Software.
1
2
V
falls to V
.
Wait out minimum t
time.
V
, I , C
CAP
SS
DIS
MAX DIS X.
Stop Discharge and begin Charge
by setting CHG control bit in ACR.
Software write.
Software.
V
rises to V and comparator
X
CAP
Wait out t
CPF clears CHG control bit.
time.
CHG
3
output trips, setting CPF which
clears CHG control bit in the ACR.
V , I
, C
X
CHG X.
Figure 15-9. A/D Conversion - Manual/Auto Discharge Control (Mode 1)
MOTOROLA
15-24
ANALOG SUBSYSTEM
MC68HC05SB7
REV 2.1
FREESCALE [ Freescale ]
