Freescale Semiconductor, Inc.
Ana log Sub syste m
Table 8-5. Sample Conversion Timing (V = 5.0 Vdc)
DD
V
f
t
C
EXT
X
OSC
CHG
Bits Counts
A/D Method
Clock Source
(Vdc)
(MHz)
0.1
1.0
2.0
4.0
0.1
1.0
2.0
4.0
0.1
1.0
2.0
4.0
0.1
1.0
2.0
4.0
0.1
1.0
2.0
4.0
0.1
1.0
2.0
4.0
0.1
1.0
2.0
4.0
0.1
1.0
2.0
4.0
(ms)
3.840
0.384
0.192
0.096
1.280
0.128
0.064
0.032
15.36
1.536
0.768
0.384
5.120
0.512
0.256
0.128
61.44
6.144
3.072
1.536
20.48
2.048
1.024
0.512
(µF)
Low Power Oscillator
0.110
0.011
0.006
0.003
0.037
0.004
0.002
0.001
0.439
0.044
0.022
0.011
0.585
0.059
0.029
0.015
1.755
0.176
0.088
0.044
0.585
0.059
0.029
0.015
Software Loop
(12 bus cycles)
4
4
16
16
3.5
(24 f
cycles)
External Pin Oscillator
Low Power Oscillator
External Pin Oscillator
Low Power Oscillator
External Pin Oscillator
Low Power Oscillator
External Pin Oscillator
Low Power Oscillator
External Pin Oscillator
Low Power Oscillator
External Pin Oscillator
Low Power Oscillator
External Pin Oscillator
Low Power Oscillator
External Pin Oscillator
OSC
Mode 0 or 1 (manual)
Programmable Timer
(prescaler = 8)
Mode 2 or 3
(TOF->ICF or OCF->ICF)
3.5
3.5
3.5
3.5
3.5
3.5
3.5
Software Loop
(12 bus cycles)
6
64
(24 f
cycles)
OSC
Mode 0 or 1 (manual)
Programmable Timer
(prescaler = 8)
Mode 2 or 3
(TOF->ICF or OCF->ICF)
6
64
Software Loop
(12 bus cycles)
8
256
256
1024
4096
(24 f
cycles)
OSC
Mode 0 or 1 (manual)
Programmable Timer
(prescaler = 8)
Mode 2 or 3
(TOF->ICF or OCF->ICF)
8
(note 1) (note 1)
Programmable Timer
(prescaler = 8)
Mode 2 or 3
(TOF->ICF or OCF->ICF)
8.192
4.096
2.048
0.234
0.117
0.059
10
12
(note 1) (note 1)
Programmable Timer
(prescaler = 8)
Mode 2 or 3
(TOF->ICF or OCF->ICF)
32.768
16.384
8.192
0.936
0.468
0.234
1. Not usable as the value of CEXT would be greater than 2.0 µF
General Release Specification
MC68HC705JJ7/MC68HC705JP7 — Rev. 3.0
Analog Subsystem
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