mc68hc912bl16 Freescale Semiconductor, Inc, mc68hc912bl16 Datasheet - Page 107

• Manufacturer Part Number: mc68hc912bl16
• Description: 16-bit Microcontroller
• Manufacturer: Freescale Semiconductor, 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
MC68HC912BL16TS/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. A write to ATDCTL5 initiates a new conversion sequence. If a conversion se-
quence 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
CD, CC, CB, and CA bits.
group. Refer to Table 36.
Prescale Value
NOTES:
Bit 7
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
0
0
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
Freescale Semiconductor, Inc.
Total Divisor
For More Information On This Product,
SCAN
10
12
14
16
2
4
6
8
Table 35 Clock Prescaler Values
5
0
Go to: www.freescale.com
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
$0065
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