參數(shù)資料
型號(hào): LTC1285CS8
廠商: Linear Technology
文件頁數(shù): 14/24頁
文件大?。?/td> 0K
描述: IC A/D CONV SAMPLING 12BIT 8SOIC
標(biāo)準(zhǔn)包裝: 100
位數(shù): 12
采樣率(每秒): 7.5k
數(shù)據(jù)接口: MICROWIRE?,串行,SPI?
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 480µW
電壓電源: 單電源
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 8-SOIC
包裝: 管件
輸入數(shù)目和類型: 1 個(gè)差分,單極
21
LTC1285/LTC1288
LABEL MNEMONIC
OPERAND
COMMENTS
LDAA
#$50
CONFIGURATION DATA FOR SPCR
STAA
$1028
LOAD DATA INTO SPCR ($1028)
LDAA
#$1B
CONFIG. DATA FOR PORT D DDR
STAA
$1009
LOAD DATA INTO PORT D DDR
LDAA
#$01
LOAD DIN WORD INTO ACC A
STAA
$50
LOAD DIN DATA INTO $50
LDAA
#$A0
LOAD DIN WORD INTO ACC A
STAA
$51
LOAD DIN DATA INTO $51
LDAA
#$00
LOAD DUMMY DIN WORD INTO
ACC A
STAA
$52
LOAD DUMMY DIN DATA INTO $52
LDX
#$1000
LOAD INDEX REGISTER X WITH
$1000
LOOP
BCLR
$08,X,#$01
D0 GOES LOW (CS GOES LOW)
LDAA
$50
LOAD DIN INTO ACC A FROM $50
STAA
$102A
LOAD DIN INTO SPI, START SCK
LDAA
$1029
CHECK SPI STATUS REG
WAIT1 BPL
WAIT1
CHECK IF TRANSFER IS DONE
LDAA
$51
LOAD DIN INTO ACC A FROM $51
STAA
$102A
LOAD DIN INTO SPI, START SCK
WAIT2 LDAA
$1029
CHECK SPI STATUS REG
BPL
WAIT2
CHECK IF TRANSFER IS DONE
LDAA
$102A
LOAD LTC1288 MSBs INTO ACC A
STAA
$62
STORE MSBs IN $62
LDAA
$52
LOAD DUMMY INTO ACC A
FROM $52
STAA
$102A
LOAD DUMMY DIN INTO SPI,
START SCK
WAIT3 LDAA
$1029
CHECK SPI STATUS REG
BPL
WAIT3
CHECK IF TRANSFER IS DONE
BSET
$08,X#$01
DO GOES HIGH (CS GOES HIGH)
LDAA
$102A
LOAD LTC1288 LSBs IN ACC
STAA
$63
STORE LSBs IN $63
JMP
LOOP
START NEXT CONVERSION
LABEL MNEMONIC
OPERAND
COMMENTS
Timing Diagram for Interface to the MC68HC11
Hardware and Software Interface to the MC68HC11
CS
CLK
DOUT
MPU
RECEIVED
WORD
LTC1285/88 TA03
SGL/
DIFF
START
B3
B7
B6
B5
B4
B2
B0
B1
B11
B10
B9
B8
DIN
MPU
TRANSMIT
WORD
BYTE 3 (DUMMY)
BYTE 2
00
SGL/
DIFF
1
BYTE 1
X
ODD/
SIGN
MSBF
X
00
0
X
XX
X
BYTE 3
BYTE 2
BYTE 1
B11
?
0
B10
B8
B9
B7
B6
B4
B5
B3
B2
B0
B1
DON'T CARE
ODD/
SIGN
?
??
?
??
?
MSBF
LTC1285/88 TA04
DOUT FROM LTC1298 STORED IN MC68HC11 RAM
B2
B1
B0
B3
B4
B6
B7
B5
0
LSB
MSB
#62
#63
0
B11
B10
B9
B8
CLK
DOUT
CS
ANALOG
INPUTS
D0
SCK
MC68HC11
DIN
MISO
LTC1288
CH0
CH1
BYTE 1
BYTE 2
MOSI
TYPICAL APPLICATIONS N
U
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