參數(shù)資料
型號: MC68HC916X1CTH16
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 16.78 MHz, MICROCONTROLLER, PQFP120
封裝: QFP-120
文件頁數(shù): 155/172頁
文件大小: 1200K
代理商: MC68HC916X1CTH16
MC68HC916X1
MOTOROLA
MC68HC916X1TS/D
83
ADCTL1 is used to initiate an A/D conversion and to select conversion modes and a conversion
channel. It can be written or read at any time. A write to ADCTL1 initiates a conversion sequence.
If a conversion sequence is already in progress, a write to ADCTL1 aborts it and resets the SCF
and CCF flags in the ADC status register.
SCAN — Scan Mode Selection Bit
0 = Single conversion sequence
1 = Continuous conversion
Length of conversion sequence(s) is determined by S8CM.
MULT — Multichannel Conversion Bit
0 = Conversion sequence(s) run on single channel (channel selected via [CD:CA])
1 = Sequential conversion of a block of four or eight channels (block selected via [CD:CA])
Length of conversion sequence(s) is determined by S8CM.
S8CM — Select Eight-Conversion Sequence Mode
0 = Four-conversion sequence
1 = Eight-conversion sequence
This bit determines the number of conversions in a conversion sequence.
[CD:CA] — Channel Selection Field
The bits in this field are used to select an input or block of inputs for A/D conversion.
Table 42 summarizes the operation of S8CM and [CD:CA] when MULT is cleared (single channel
mode). Number of conversions per channel is determined by SCAN.
ADCTL1 — A/D Control Register 1
$YFF70C
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
NOT USED
SCAN MULT S8CM
CD
CC
CB
CA
RESET:
0
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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