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參數(shù)資料
| 型號： | LTC1090CSW#TR |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 9/28頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DATA ACQ SYSTEM 10BIT 20SOIC |
| 標準包裝： | 1,000 |
| 類型： | 數(shù)據(jù)采集系統(tǒng)（DAS），ADC |
| 分辨率（位）： | 10 b |
| 采樣率（每秒）： | 30k |
| 數(shù)據(jù)接口： | 串行 |
| 電壓電源： | 單/雙電源 |
| 電源電壓： | ±5V，5V，10V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-SOIC（0.295"，7.50mm 寬） |
| 供應商設備封裝： | 20-SOIC |
| 包裝： | 帶卷 (TR) |
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17
LTC1090
1090fc
Parallel Port Microprocessors
When interfacing the LTC1090 to an MPU which has a
parallel port, the serial signals are created on the port with
software. Three MPU port lines are programmed to create
the CS, SCLK and DIN signals for the LTC1090. A fourth
port line reads the DOUT line. An example is made of the
Intel 8051/8052/80C252 family.
Intel 8051
To interface to the 8051, the LTC1090 is programmed for
MSB first format and 10-bit word length. The 8051 gener-
ates CS, SCLK and DIN on three port lines and reads DOUT
on the fourth.
Hardware and Software Interface to Intel 8051 Processor
8051 Code
MNEMONIC
DESCRIPTION
MOV PI,#02H
Initialize port 1 (bit 1 is made
an input)
CLR P1.3
SCLK goes low
SETB P1.4
CS goes high
CONTINUE: MOV A,#0DH
DIN word for the LTC1090 is
placed in ACC.
CLR P1.4
CS goes low
MOV R4,#08
Load counter
NOP
Delay for deglitcher
LOOP:
MOV C, P1.1
Read data bit into carry
RLC A
Rotate data bit into ACC
MOV P1.2, C
Output DIN bit to LTC1090
SETB P1.3
SCLK goes high
CLR P1.3
SCLK goes low
DJNZ R4, LOOP
Next bit
MOV R2, A
Store MSBs in R2
MOV C, P1.1
Read data bit into carry
CLR A
CIear ACC
RLC A
Rotate data bit into ACC
SETB P1.3
SCLK goes high
CLR P1.3
SCLK goes low
MOV C, P1.1
Read data bit into carry
RRC A
Rotate right into ACC
RRC A
Rotate right into ACC
MOV R3, A
Store LSBs in R3
SETB P1.3
SCLK goes high
CLR P1.3
SCLK goes low
SETB P1.4
CS goes high
MOV R5,#07H
Load counter
DELAY:
DJNZ R5, DELAY
Delay for LTC1090 to perform
conversion
AJMP CONTINUE
Repeat program
APPLICATIO S I FOR ATIO
WU
UU
Figure 5. Several LTC1090’s Sharing One 3-Wire Serial Interface
LTC1090
ANALOG
INPUTS
DOUT
DOUT from LTC1090 stored in 8051 RAM
DIN
SCLK
ACLK
CS
P1.1
P1.2
P1.3
ALE
P1.4
8051
B9
R2
R3
*B9 is MSB in unipolar or sign bit in bipolar
MSB*
LSB
B8 B7 B6 B5 B4 B3 B2
B1 B0
000000
LTC1090 AI14
LTC1090
3
21 0
CS
8 CHANNELS
OUTPUT PORT
SERIAL DATA
3-WIRE SERIAL
INTERFACE TO OTHER
PERIPHERALS OR LTC1090s
MPU
LTC1090
3
CS
8 CHANNELS
LTC1090
3
CS
8 CHANNELS
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相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1090M | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Single Chip 10-Bit Data Acquisition System |
| LTC1090MJ | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Single Chip 10-Bit Data Acquisition System |
| LTC1090MJ/883 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Single-Ended Data Acquisition System |
| LTC1091 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1-, 2-, 6- and 8-Channel, 10-Bit Serial I/O Data Acquisition Systems |
| LTC1091AC | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1-, 2-, 6- and 8-Channel, 10-Bit Serial I/O Data Acquisition Systems |
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