參數(shù)資料
型號(hào): LTC1294
廠商: Linear Technology Corporation
英文描述: Single Chip 12-Bit Data Acquisition System(單片,12位數(shù)據(jù)采集系統(tǒng))
中文描述: 單芯片12位數(shù)據(jù)采集系統(tǒng)(單片,12位數(shù)據(jù)采集系統(tǒng))
文件頁(yè)數(shù): 16/28頁(yè)
文件大?。?/td> 403K
代理商: LTC1294
16
LTC1293/LTC1294/LTC1296
U
S
A
O
PPLICATI
U
U
STAA
$102A
$1029
WAIT2
$102A
$62
$52
LOAD DIN INTO SPI, START SCK
CHECK SPI STATUS REG
CHECK IF TRANSFER IS DONE
LOAD LTC1294 MSBs INTO ACC A
STORE MSBs IN $62
LOAD DUMMY DIN INTO ACC A FROM
$52
LOAD DUMMY DIN INTO SPI, START
SCK
CHECK SPI STATUS REG
CHECK IF TRANSFER IS DONE
D0 GOES HIGH (CS GOES HIGH)
LOAD LTC1294 LSBs IN ACC
STORE LSBs IN $63
WAIT2 LDAA
BPL
LDAA
STAA
LDAA
STAA
$102A
WAIT3 LDAA
$1029
WAIT3
$08,X,$01
$102A
$63
BPL
BSET
LDAA
STAA
JMP
LOOP
START NEXT CONVERSION
LABEL MNEMONIC OPERAND
LDAA
STAA
LDAA
STAA
LDAA
STAA
LDAA
STAA
LDAA
STAA
LDX
LOOP
BCLR
LDAA
STAA
LDAA
WAIT1 BPL
LDAA
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
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
CHECK SPI STATUS REG
CHECK IF TRANSFER IS DONE
LOAD DIN INTO ACC A FROM $51
#$50
$1028
#$1B
$1009
#$10
$50
#$E0
$51
#$00
$52
#$1000
$08,X,$01
$50
$102A
$1029
WAIT1
$51
MC68HC11 CODE
LABEL MNEMONIC OPERAND
COMMENTS
Hardware and Software Interface to Intel 8051
CS
CLK
DATA
(D
IN
/D
OUT
)
LTC1293 TD02
1
2
3
4
6
5
7
8
PS BIT LATCHED
INTO LTC1294
8051 P1.2 OUTPUT DATA
TO LTC1294
8051 P1.2 RECONFIGURED
AS INPUT AFTER THE 8TH RISING
CLK BEFORE THE 8TH FALLING CLK
LTC1294 SEND A/D RESULT
BACK TO 8051 P1.2
LTC1294 TAKES CONTROL OF DATA
LINE ON 8TH FALLING CLK
START
B11
SGL/
DIFF
ODD/
SIGN
SEL
1
SEL
0
UNI
MSB
PS
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
Hardware and Software Interface to Intel 8051
LTC1293 TD02a
DOUT FROM LTC1294 STORED IN 8051 RAM
MSB
0
0
0
0
B0
B2
B3
B1
B10
B11
LSB
R2
R3
B9
B8
B7
B6
B5
B4
CLK
D
OUT
CS
ANALOG
INPUTS
P1.4
P1.3
8051
D
IN
P1.2
MUX ADDRESS
A/D RESULT
LTC1294
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