MC68HC05JJ6 Datasheet, PDF (112/216 Pages) Freescale Semiconductor, Inc – General Release Specification Microcontrollers

Analog Subsystem
Table 8-3. A/D Conversion Options
A/D
Option
Mode
Charge
Control
A/D Options
ISEN ATD2 ATD1 CHG
Current Flow To/From PB0/AN0
Current
Disabled
Source and
Discharge
0
X
X
X Current control disabled, no source or sink current
Disabled
Manual
1
0
0
0
Begin sinking current when the CHG bit is cleared
and continue to sink current until the CHG bit is set.
0
Charge and
Begin sourcing current when the CHG bit is set and
Discharge
1
0
0
1
continue to source current until the CHG bit is
cleared.
Begin sinking current when the CHG bit is cleared
Manual
1
0
1
0
and continue to sink current until the CHG bit is set.
(The CHG bit is cleared by writing a logical zero to
1
Charge and
Automatic
it or when the CPF2 flag bit is set.)
Begin sourcing current when the CHG bit is set; and
Discharge
1
0
1
1
continue to source current until the CHG bit is
cleared. (The CHG bit is set by writing a logical one
to it or cleared when the CPF2 flag bit is set.)
Automatic
Charge and
1
1
0
0
The CHG bit remains cleared until the next timer
TOF occurs.
2
Discharge
(TOF–ICF)
Synchronized ¹
1
0
1
The CHG bit remains set until the next timer ICF
occurs.
to Timer
Automatic
Charge and
1
1
1
0
The CHG bit remains cleared until the next timer
OCF occurs.
3
Discharge
(OCF–ICF)
Synchronized ¹
1
1
1
The CHG bit remains set until the next timer ICF
occurs.
to Timer
X = Don’t Care
General Release Specification
112
Analog Subsystem
MC68HC05JJ6/MC68HC05JP6 — Rev. 3.2
Freescale Semiconductor