MC68HC912B32MFU8 MOTOROLA [Motorola, Inc], MC68HC912B32MFU8 Datasheet - Page 111

• Manufacturer Part Number: MC68HC912B32MFU8
• Description: 16-Bit Microcontroller
• Manufacturer: MOTOROLA [Motorola, Inc]

ATDCTL5 — ATD Control Register 5
S8CM — Select 8 Channel Mode
SCAN — Enable Continuous Channel Scan
MULT — Enable Multichannel Conversion
CD, CC, CB, and CA — Channel Select for Conversion
MC68HC912B32
MC68HC912B32TS/D
RESET:
The ATD control register 5 is used to select the conversion modes, the conversion channel(s), and ini-
tiate conversions.
Read or write anytime. Writes to the ATD control registers initiate a new conversion sequence. If a con-
version sequence is in progress when a write occurs, that sequence is aborted and the SCF and CCF
bits are reset.
When a conversion sequence is initiated by a write to the ATDCTL register, the user has a choice of
performing a sequence of four (or eight, depending on the S8CM bit) conversions or continuously per-
forming four (or eight) conversion sequences.
0 = Conversion sequence consists of four conversions
1 = Conversion sequence consists of eight conversions
0 = Single conversion sequence
1 = Continuous conversion sequences (scan mode)
0 = ATD sequencer runs all four or eight conversions on a single input channel selected via the
1 = ATD sequencer runs each of the four or eight conversions on sequential channels in a specific
Prescale Value
CD, CC, CB, and CA bits.
group. Refer to Table 41.
NOTES:
Bit 7
0
0
1. Maximum conversion frequency is 2 MHz. Maximum P clock divisor value will become
2. Minimum conversion frequency is 500 kHz. Minimum P clock divisor value will become
00000
00001
00010
00011
00100
00101
00110
00111
01xxx
1xxxx
maximum conversion rate that can be used on this ATD module.
minimum conversion rate that this ATD can perform.
S8CM
6
0
Total Divisor
SCAN
10
12
14
16
2
4
6
8
Table 40 Clock Prescaler Values
5
0
MULT
4
0
Max P Clock
4 MHz
8 MHz
8 MHz
8 MHz
8 MHz
8 MHz
8 MHz
8 MHz
Do Not Use
CD
3
0
1
CC
2
0
Min P Clock
CB
1 MHz
2 MHz
3 MHz
4 MHz
5 MHz
6 MHz
7 MHz
8 MHz
1
0
2
Bit 0
CA
0
MOTOROLA
$0065
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