MC68HC05L28B MOTOROLA [Motorola, Inc], MC68HC05L28B Datasheet - Page 100

• Manufacturer Part Number: MC68HC05L28B
• Description: Flexible general-purpose microcomputer
• Manufacturer: MOTOROLA [Motorola, Inc]

9
Power-on or external reset will clear the ADON bit, disabling the A/D converter.
9.2.1.4
The CH3–CH0 bits allow the user to determine which channel of the A/D converter multiplexer is
selected. See Table 9-2 for channel selection.
Reset clears these bits.
MOTOROLA
9-4
CH3 – CH0 — A/D channels 3, 2, 1 and 0
ADRC
0
0
1
1
CH3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
ADON
0
1
0
1
Table 9-2 A/D channel assignment
CH2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
Table 9-1 A/D clock selection
oscillator
OFF
OFF
ON
ON
RC
CH1
A/D CONVERTER
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
converter
CH0
OFF
OFF
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
ON
ON
A/D
AD0
AD1
reserved
reserved
reserved
reserved
reserved
reserved
VRH pin (high)
(VRH + VRL) / 2
VRL pin (low)
VRL pin (low)
VRL pin (low)
VRL pin (low)
VRL pin (low)
VRL pin (low)
A/D switched off.
A/D using CPU clock.
Allows the RC oscillator to stabilise.
A/D using RC oscillator clock.
Channel selected
Comments
MC68HC05L28
TPG