參數(shù)資料
型號(hào): LTC1291DIN8
廠商: LINEAR TECHNOLOGY CORP
元件分類(lèi): ADC
英文描述: Single Chip 12-Bit Data Acquisition System
中文描述: 2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP8
封裝: PLASTIC, DIP-8
文件頁(yè)數(shù): 11/20頁(yè)
文件大小: 376K
代理商: LTC1291DIN8
11
LTC1291
Timing Diagram for Interface to the MC68HC11
LABEL MNEMONIC
LDAA
OPERAND
#$00
COMMENTS
LOAD DUMMY DIN WORD INTO
ACC A
LOAD DUMMY DIN DATA INTO $52
LOAD INDEX REGISTER X WITH
$1000
D0 GOES LOW (CS GOES LOW)
LOAD DIN INTO ACC A FROM $50
LOAD DIN INTO SPI, START SCK
LTC1291 AI07
DOUT FROM LTC1291 STORED IN MC68HC11 RAM
MSB
B2
B1
B0
B3
B4
B6
B7
B5
0
0
LSB
#62
#63
0
0
B11
B10
B9
B8
CLK
D
OUT
CS
ANALOG
INPUTS
D0
SCK
MC68HC11
MISO
D
IN
LTC1291
CH0
CH1
BYTE 1
BYTE 2
MOSI
Hardware and Software Interface to Motorola MC68HC11
MC68HC11 CODE
In this example the D
IN
word configures the input MUX for
a single-ended input to be applied to CH0. The conversion
result is output MSB-first.
CS
CLK
D
OUT
RE WORD
LTC1291 AI06
SGL/
DIFF
START
MSBF
PS
B3
B7
B6
B5
B4
B2
B0
B1
B11
B10
B9
B8
D
IN
TRANMPU
WORD
BYTE 3 (DUMMY)
BYTE 2
0
0
0
DIFF
1
BYTE 1
X
ODD/
MSBF
PS
X
X
X
X
0
0
0
X
X
X
X
X
X
X
X
BYTE 3
BYTE 2
BYTE 1
B11
0
B10
B8
B9
B7
B6
B4
B5
B3
B2
B0
B1
DON'T CARE
ODD/
LABEL MNEMONIC
LDAA
STAA
LDAA
STAA
LDAA
STAA
LDAA
STAA
OPERAND
#$50
$1028
#$1B
$1009
#$03
$50
#$60
$51
COMMENTS
CONFIGURATION DATA FOR SPCR
LOAD DATA INTO SPCR ($1028)
CONFIG. DATA FOR PORT D DDR
LOAD DATA INTO PORT D DDR
LOAD DIN WORD INTO ACC A
LOAD DIN DATA INTO $50
LOAD DIN WORD INTO ACC A
LOAD DIN DATA INTO $51
STAA
LDX
$52
#$1000
LOOP
BCLR
LDAA
STAA
$08,X,#$01
$50
$102A
U
S
A
O
PPLICATI
U
U
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